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Fike CD, Aschner JL, Avachat C, Birnbaum AK, Sherwin CMT. Multi-dose enteral L-citrulline administration in premature infants at risk of developing pulmonary hypertension associated with bronchopulmonary dysplasia. J Perinatol 2024; 44:280-287. [PMID: 37907796 PMCID: PMC10844094 DOI: 10.1038/s41372-023-01809-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 10/10/2023] [Accepted: 10/18/2023] [Indexed: 11/02/2023]
Abstract
OBJECTIVE Information is needed to guide the design of randomized controlled trials (RCTs) evaluating L-citrulline therapy for premature infants with pulmonary hypertension associated with bronchopulmonary dysplasia (BPD-PH). Based on our single-dose pharmacokinetic study, we evaluated the ability of a multi-dose enteral L-citrulline strategy to achieve a target trough steady-state L-citrulline plasma concentration and its tolerability in premature infants. STUDY DESIGN Plasma L-citrulline concentrations were measured in six premature infants receiving 60 mg/kg L-citrulline every 6 h for 72 h before the first and last L-citrulline doses. L-citrulline concentrations were compared to concentration-time profiles from our previous study. RESULTS Target trough plasma L-citrulline concentrations were achieved in 2/6 subjects. No serious adverse events occurred. CONCLUSIONS Multi-dose L-citrulline was well tolerated. These results will assist in the design of phase II RCTs evaluating L-citrulline dosage strategies to achieve target plasma L-citrulline concentrations in infants at risk for BPD-PH. CLINICAL TRIALS gov ID: NCT03542812.
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Affiliation(s)
- Candice D Fike
- Department of Pediatrics, the University of Utah Health, Salt Lake City, UT, USA.
| | - Judy L Aschner
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Pediatrics, Hackensack Meridian School of Medicine, Nutley, NJ, USA
| | - Charul Avachat
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Angela K Birnbaum
- Department of Pediatrics, the University of Utah Health, Salt Lake City, UT, USA
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Catherine M T Sherwin
- Department of Pediatrics, the University of Utah Health, Salt Lake City, UT, USA
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
- Dayton Children's Hospital, Dayton, OH, USA
- Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton, OH, USA
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Cohen MJ, Meador KJ, Loring DW, Matthews AG, Brown C, Robalino CP, Birnbaum AK, Voinescu PE, Kalayjian LA, Gerard EE, Gedzelman ER, Hanna J, Cavitt J, Sam MC, French JA, Hwang ST, Pack AM, Pennell PB. Behavioral Outcomes and Neurodevelopmental Disorders Among Children of Women With Epilepsy. JAMA Neurol 2024; 81:19-29. [PMID: 37983058 PMCID: PMC10660252 DOI: 10.1001/jamaneurol.2023.4315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 09/21/2023] [Indexed: 11/21/2023]
Abstract
Importance The association of fetal exposure to antiseizure medications (ASMs) with outcomes in childhood are not well delineated. Objective To examine the association of fetal ASM exposure with subsequent adaptive, behavioral or emotional, and neurodevelopmental disorder outcomes at 2, 3, and 4.5 years of age. Design, Setting, and Participants The Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) study is a prospective, observational cohort study conducted at 20 epilepsy centers in the US. A total of 456 pregnant women with epilepsy or without epilepsy were enrolled from December 19, 2012, to January 13, 2016. Children of enrolled women were followed up with formal assessments at 2, 3, 4.5, and 6 years of age. Statistical analysis took place from August 2022 to May 2023. Exposures Exposures included mother's epilepsy status as well as mother's ASM blood concentration in the third trimester (for children of women with epilepsy). Women with epilepsy were enrolled regardless of ASM regimen. Main Outcomes and Measures The primary outcome was the Adaptive Behavior Assessment System, Third Edition (ABAS-3) General Adaptive Composite (GAC) score among children at 4.5 years of age. Children of women with epilepsy and children of women without epilepsy were compared, and the associations of ASM exposures with outcomes among exposed children were assessed. Secondary outcomes involved similar analyses of other related measures. Results Primary analysis included 302 children of women with epilepsy (143 boys [47.4%]) and 84 children of women without epilepsy (45 boys [53.6%]). Overall adaptive functioning (ABAS-3 GAC score at 4.5 years) did not significantly differ between children of women with epilepsy and children of women without epilepsy (parameter estimate [PE], 0.4 [95% CI, -2.5 to 3.4]; P = .77). However, in adjusted analyses, a significant decrease in functioning was seen with increasing third-trimester maximum ASM blood concentrations (PE, -7.8 [95% CI, -12.6 to -3.1]; P = .001). This decrease in functioning was evident for levetiracetam (PE, -18.9 [95% CI, -26.8 to -10.9]; P < .001) and lamotrigine (PE, -12.0 [95% CI, -23.7 to -0.3]; P = .04), the ASMs with sample sizes large enough for analysis. Results were similar with third-trimester maximum daily dose. Conclusions and Relevance This study suggests that adaptive functioning of children of women with epilepsy taking commonly used ASMs did not significantly differ from that of children of women without epilepsy, but there was an exposure-dependent association of ASMs with functioning. Thus, psychiatric or psychological screening and referral of women with epilepsy and their offspring are recommended when appropriate. Additional research is needed to confirm these findings.
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Affiliation(s)
- Morris J. Cohen
- Pediatric Neuropsychology International LLC, Augusta, Georgia
| | - Kimford J. Meador
- Department of Neurology & Neurological Sciences, Stanford University, Palo Alto, California
| | - David W. Loring
- Department of Neurology, Emory University School of Medicine, Atlanta, Georgia
| | - Abigail G. Matthews
- Department of Biostatistics, The Emmes Company, Rockville, Maryland
- Department of Project Leadership, The Emmes Company, Rockville, Maryland
| | - Carrie Brown
- Department of Biostatistics, The Emmes Company, Rockville, Maryland
- Department of Project Leadership, The Emmes Company, Rockville, Maryland
| | - Chelsea P. Robalino
- Department of Biostatistics, The Emmes Company, Rockville, Maryland
- Department of Project Leadership, The Emmes Company, Rockville, Maryland
| | - Angela K. Birnbaum
- Epilepsy Research and Education Program, Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis
| | - Paula E. Voinescu
- Department of Neurology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | | | - Elizabeth E. Gerard
- Division of Epilepsy and Clinical Neurophysiology, Department of Neurology, Northwestern University, Chicago, Illinois
| | - Evan R. Gedzelman
- Department of Neurology, Emory University School of Medicine, Atlanta, Georgia
| | - Julie Hanna
- Adult Epilepsy, Minnesota Epilepsy Group, St Paul
| | - Jennifer Cavitt
- Division of Epilepsy, Department of Neurology, University of Cincinnati, Cincinnati, Ohio
| | - Maria C. Sam
- Department of Neurology, Wake Forest University, Winston-Salem, North Carolina
| | - Jacqueline A. French
- Department of Neurology and Comprehensive Epilepsy Center, New York University Comprehensive Epilepsy Center, New York
| | - Sean T. Hwang
- Department of Neurology, Northwell Health, Great Neck, New York
| | - Alison M. Pack
- Department of Neurology, Columbia University, New York, New York
| | - Page B. Pennell
- Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania
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Avachat C, Younis IR, Birnbaum AK. Characterization of the US Food and Drug Administration Post-Marketing Commitments and Requirements for Pregnancy and Lactation. Clin Pharmacol Ther 2023; 114:1238-1242. [PMID: 37750407 PMCID: PMC11006429 DOI: 10.1002/cpt.3059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/06/2023] [Indexed: 09/27/2023]
Abstract
Enactment of the US Food and Drug Administration Amendments Act (FDAAA) in 2007 and the Pregnancy and Lactation Labeling Rule (PLLR) in 2015 are important milestones giving the FDA the authority to request studies in pregnant and lactating women. Our objective was to characterize trends of pregnancy and lactation-related postmarketing commitments (PMCs) and postmarketing requirements (PMRs) for new molecular entities approved by the FDA between 2000 and 2022. Approval letters of original New Drug Applications (NDAs, N = 488) for new molecular entities were obtained from the FDA website. NDAs with pregnancy and lactation-based PMCs/PMRs were identified, and data extracted. Data included: PMC/PMR timelines and attributes of requested study(ies) (type, design elements, and outcomes) when available. Fifty-nine NDAs included 92 PMCs/PMRs related to pregnancy and lactation. Forty-one NDAs had pregnancy-related PMRs/PMCs, 4 had lactation-related PMRs, and 14 had both. Most PMRs/PMCs were for nervous system medications (N = 33). Forty-seven NDAs specified safety data collection in infants in at least the first year of life. All pregnancy-related PMRs were issued after 2008, most PMCs (N = 8) were issued before 2008. Only one PMC requested a pharmacokinetic study in pregnant women. All lactation-related PMRs (N = 18) requested measurement of drug concentrations in breast milk with one also requiring measurement of maternal blood concentrations. Eighty-nine percent of lactation-related PMRs were requested after 2015. There was a steady increase in pregnancy and lactation-related PMRs following enactment of FDAAA and PLLR. Additions involved information collection pertaining to safety of the medication in pregnant and lactating women and children exposed to medications during pregnancy and breastfeeding.
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Affiliation(s)
- Charul Avachat
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Islam R Younis
- Department of Quantitative Clinical Pharmacology and Pharmacometrics, Merck & Co., Inc., Rahway, New Jersey, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
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Haslund-Krog S, Barry JM, Birnbaum AK, Dalhoff K, Brink Henriksen T, Sherwin CMT, Avachat C, Poulsen S, Christensen U, Remmel RP, Wilkins D, van den Anker JN, Holst H. Pharmacokinetics and safety of prolonged paracetamol treatment in neonates: An interventional cohort study. Br J Clin Pharmacol 2023; 89:3421-3431. [PMID: 37353311 DOI: 10.1111/bcp.15834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 06/25/2023] Open
Abstract
AIMS To investigate the pharmacokinetics and safety of prolonged paracetamol use (>72 h) for neonatal pain. METHODS Neonates were included if they received paracetamol orally or intravenously for pain treatment. A total of 126 samples were collected. Alanine aminotransferase and bilirubin were measured as surrogate liver safety markers. Paracetamol and metabolites were measured in plasma. Pharmacokinetic parameters for the parent compound were estimated with a nonlinear mixed-effects model. RESULTS Forty-eight neonates were enrolled (38 received paracetamol for >72 h). Median gestational age was 38 weeks (range 25-42), and bodyweight at inclusion was 2954 g (range 713-4750). Neonates received 16 doses (range 4-55) over 4.1 days (range 1-13.8). The median (range) dose was 10.1 mg/kg (2.9-20.3). The median oxidative metabolite concentration was 14.6 μmol/L (range 0.12-113.5) and measurable >30 h after dose. There was no significant difference (P > .05) between alanine aminotransferase and bilirubin measures at <72 h or >72 h of paracetamol treatment or the start and end of the study. Volume of distribution and paracetamol clearance for a 2.81-kg neonate were 2.99 L (% residual standard error = 8, 95% confidence interval 2.44-3.55) and 0.497 L/h (% residual standard error = 7, 95% confidence interval 0.425-0.570), respectively. Median steady-state concentration from the parent model was 50.3 μmol/L (range 30.6-92.5), and the half-life was 3.55 h (range 2.41-5.65). CONCLUSION Our study did not provide evidence of paracetamol-induced liver injury nor changes in metabolism in prolonged paracetamol administration in neonates.
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Affiliation(s)
- Sissel Haslund-Krog
- Department of Clinical Pharmacology, Bispebjerg and Frederiksberg University Hospital, Copenhagen NV, Denmark
| | - Jessica M Barry
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Kim Dalhoff
- Department of Clinical Pharmacology, Bispebjerg and Frederiksberg University Hospital, Copenhagen NV, Denmark
| | - Tine Brink Henriksen
- Neonatal Intensive Care Unit, Department of Paediatrics, Aarhus University Hospital, Aarhus N, Denmark
| | - Catherine M T Sherwin
- Pediatric Clinical Pharmacology, Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton, Ohio, USA
- Department of Pediatrics, Dayton Children's Hospital, Dayton, Ohio, USA
| | - Charul Avachat
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Susanne Poulsen
- Neonatal Intensive Care Unit, Rigshospitalet, Copenhagen Ø, Denmark
| | - Ulla Christensen
- Neonatal Intensive Care Unit, Department of Paediatrics, Aarhus University Hospital, Aarhus N, Denmark
| | - Rory P Remmel
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Diana Wilkins
- Division of Medical Laboratory Sciences, Department of Pathology, University of Utah, School of Medicine, Salt Lake City, Utah, USA
| | - John N van den Anker
- Division of Clinical Pharmacology, Children's National Hospital, Washington, District of Columbia, USA
- Division of Paediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Basel, Switzerland
| | - Helle Holst
- Department of Clinical Pharmacology, Bispebjerg and Frederiksberg University Hospital, Copenhagen NV, Denmark
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Barry JM, French JA, Pennell PB, Karanam A, Harden CL, Birnbaum AK. Empiric dosing strategies to predict lamotrigine concentrations during pregnancy. Pharmacotherapy 2023; 43:998-1006. [PMID: 37475496 PMCID: PMC10948204 DOI: 10.1002/phar.2856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 05/30/2023] [Accepted: 06/04/2023] [Indexed: 07/22/2023]
Abstract
INTRODUCTION Maintaining seizure control with lamotrigine is complicated by altered pharmacokinetics and existence of subpopulations in whom clearance increases or remains constant during pregnancy. OBJECTIVE Our objective was to characterize the potential for particular dosing scenarios to lead to increased seizure risk or toxicity. METHODS Lamotrigine pharmacokinetic parameters obtained from our previous study were applied to a one-compartment model structure with subpopulations (75:25%) exhibiting different clearance changes. A single-patient simulation was conducted with typical pharmacokinetic parameter values from each subpopulation. Population-level simulations (N = 48,000) included six dosing scenarios and considered four preconception doses using the R package mrgsolve (Metrum Research Group). Thresholds for efficacy and toxicity were selected as drug concentration that are 65% lower than preconception concentrations and doubling of preconception concentrations, respectively. RESULTS Individual simulation results demonstrated that without dose increases, concentrations fell below 0.65 at 6-8 weeks in the high clearance change (HC) subpopulation, depending on preconception clearance. While no simulated dosing regimen allowed all women in both subpopulations to maintain preconception concentrations, some regimens provided a more balanced risk profile than others. Predicted concentrations suggested potential increased seizure risk for 7%-100% of women in the HC group depending on preconception dose and subpopulation. Additionally, in 63% of dosing scenarios for women with low clearance change (LC), there was an increased risk of toxicity (34%-100% of women). SIGNIFICANCE A substantial percentage of simulated individuals had concentrations low enough to potentially increase seizure risk or high enough to create toxicity. Early clearance changes indicate possible subpopulation categorization if therapeutic drug monitoring is conducted in the first trimester. An arbitrary "one-size-fits-all" philosophy may not work well for lamotrigine dosing adjustments during pregnancy and reinforces the need for therapeutic drug monitoring until a patient is determined to be in the LC or HC group.
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Affiliation(s)
- Jessica M Barry
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Jacqueline A French
- Department of Neurology, New York University Comprehensive Epilepsy Center, New York, New York
| | - Page B Pennell
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Ashwin Karanam
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | | | - Angela K Birnbaum
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
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Meador KJ, Cohen MJ, Loring DW, Matthews AG, Brown C, Robalino CP, Birnbaum AK, Voinescu PE, Kalayjian LA, Gerard EE, Gedzelman ER, Hanna J, Cavitt J, Sam M, French JA, Hwang S, Pack AM, Pennell PB. Cognitive outcomes at age 3 years in children with fetal exposure to antiseizure medications (MONEAD study) in the USA: a prospective, observational cohort study. Lancet Neurol 2023; 22:712-722. [PMID: 37479375 PMCID: PMC10423009 DOI: 10.1016/s1474-4422(23)00199-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 07/23/2023]
Abstract
BACKGROUND The neurodevelopmental effects of fetal exposure to most antiseizure medications are unclear. We aimed to investigate the effects of fetal exposure to commonly used antiseizure medications on neuropsychological outcomes at age 3 years. METHODS The Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) study is a prospective, observational, multicentre cohort study at 20 specialty epilepsy centres in the USA. We have investigated pregnancy outcomes in women (aged 14-45 years) with and without epilepsy who were enrolled during pregnancy (≤20 weeks' gestational age), and their children. The primary outcome for children at age 3 years was a blindly assessed Verbal Index score, which was calculated by averaging scores on the Naming Vocabulary and Verbal Comprehension subtests of Differential Ability Scales-II, Expressive Communication and Auditory Comprehension subscales of Preschool Language Scale-5, and Peabody Picture Vocabulary Test-4. Children of women with and without epilepsy were compared, and the associations of medication exposures to outcomes in exposed children were assessed. The MONEAD study is registered with ClinicalTrials.gov, NCT0730170, and is ongoing. FINDINGS Between Dec 19, 2012, and Jan 13, 2016, 456 pregnant women (351 with epilepsy and 105 without epilepsy) were enrolled into the study. 345 children were born to women with epilepsy and 106 children were born to women without epilepsy. Verbal Index scores at age 3 years did not differ for children of women with epilepsy (n=284; adjusted least-square mean 102·7, 95% CI 101·4 to 103·9) versus those without epilepsy (n=87; 102·3, 99·8 to 104·7). Significant risk factors for reduced Verbal Index scores included maternal intelligence quotient, maternal education, post-birth anxiety, gestational age at enrolment, child's sex, and child's ethnicity. For Verbal Index scores, antiseizure medication exposure effects were not seen for maximum third trimester blood concentrations (n=258; adjusted parameter estimate -2·9, 95% CI -6·7 to 1·0). However, in secondary analyses, exposure-dependent effects were present on multiple cognitive measures, which varied by medication. INTERPRETATION We found no difference in neurodevelopmental outcomes between children with fetal exposure to newer antiseizure medications compared with unexposed children. However, some exposure-dependent antiseizure medication effects were seen in secondary analyses. The adverse effects of maternal post-birth anxiety emphasise the importance of screening mothers during pregnancy and postpartum and implementing interventions. Additional studies are needed to clarify the exposure-dependent effects. FUNDING National Institutes of Health, National Institute of Neurological Disorders and Stroke, and National Institute of Child Health and Development.
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Affiliation(s)
| | - Morris J Cohen
- Pediatric Neuropsychology International, Augusta, GA, USA
| | | | | | | | | | | | - Paula E Voinescu
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | | | | | | | - Julie Hanna
- Minnesota Epilepsy Group, Roseville, MN, USA
| | | | - Maria Sam
- Wake Forest University, Winston-Salem, NC, USA
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Lyu X, Illamola SM, Marino SE, Leppik IE, Dahmer S, Lehfeldt P, Conway JM, Remmel RP, Kingsley K, Birnbaum AK. Medical Cannabis Received by Patients According to Qualifying Condition in a US State Cannabis Program: Product Choice, Dosing, and Age-Related Trends. Curr Ther Res Clin Exp 2023; 99:100709. [PMID: 37538850 PMCID: PMC10393751 DOI: 10.1016/j.curtheres.2023.100709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 06/02/2023] [Indexed: 08/05/2023]
Abstract
Background Little is known about the distribution of cannabidiol (CBD) and Δ9-tetrahydrocannabinol (THC) to patients participating in state medical cannabis programs. The Minnesota cannabis program requires third-party testing of products with limited formulations of cannabis for distribution to patients. Objective To characterize the distribution of cannabis products, their CBD/THC content, and dosing among patients with qualifying conditions. Methods This is a retrospective analysis of ∼50% of registered users receiving medical cannabis in Minnesota (June 16, 2016, to November 15, 2019). Data included formulation, CBD/THC prescribed doses, and qualifying conditions. The primary end points were calculated using daily dose and duration of use. Comparisons were made for CBD and THC total daily dose dispensed, patient age, and approved product. Nonparametric statistical tests were used (significance was set at p < 0.05). Results A total of 11,520 patients were listed with 1 qualifying condition. The most common condition was intractable pain (60.0%). Median dispensation duration varied from 53 days (cancer) to 322 days (muscle spasms). Most (≥62.8%) patients across all qualifying conditions received both CBD and THC. Median THC dose was lower in older (≥65 years) compared with younger adults with intractable pain (p < 0.0001) and cancer patients (p = 0.0152), and the same pattern was found CBD dose with seizure (p = 0.0498) patients. For commercial products with Food and Drug Administration indications, the median CBD total daily dose was 86.9% lower than the recommended doses for patients with seizures (Epidiolex: Jazz Pharmaceuticals, Palo Alto CA) and median THC total daily dose was 65.3% (Syndros: Benuvia Manufacturing, Round Rock, TX) or 79.3% lower (Marinol: Banner Pharmacaps, Inc., High Point, NC) for cancer patients. Conclusions A majority of patients received products containing both CBD and THC. Dosages varied by age group and were lower than recommended for conditions with Food and Drug Administration-approved products. Complex pharmacokinetics of THC and CBD, possible age-related changes in physiology, unknown efficacy, and potential for drug interactions all increase the need for monitoring of patients receiving cannabis products. (Curr Ther Res Clin Exp. 2023; 84:XXX-XXX).
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Affiliation(s)
- Xintian Lyu
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Sílvia M. Illamola
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Susan E. Marino
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
- Center for Clinical and Cognitive Neuropharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Ilo E. Leppik
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
- Center for Clinical and Cognitive Neuropharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
- Department of Neurology, School of Medicine, University of Minnesota, Minneapolis, Minnesota
| | - Stephen Dahmer
- Family Medicine and Community Health, Icahn School of Medicine at Mount Sinai, New York, New York
- Goodness Growth Holdings, Minneapolis, Minnesota
| | | | - Jeannine M. Conway
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Rory P. Remmel
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | | | - Angela K. Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
- Center for Clinical and Cognitive Neuropharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
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Ramsay RE, Becker D, Vazquez B, Birnbaum AK, Misra SN, Carrazana E, Rabinowicz AL. Acute Abortive Therapies for Seizure Clusters in Long-Term Care. J Am Med Dir Assoc 2023:S1525-8610(23)00405-X. [PMID: 37253432 DOI: 10.1016/j.jamda.2023.04.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 06/01/2023]
Abstract
OBJECTIVES To describe acute seizure treatment for the long-term care setting, emphasizing rescue (acute abortive) medications for on-site management of acute unexpected seizures and seizure clusters. DESIGN Narrative review. SETTING AND PARTICIPANTS People with seizures in long-term care, including group residences. METHODS PubMed was searched using keywords that pertained to rescue medications, seizure emergencies/epilepsy, seizure action plans, and long-term care. RESULTS Seizure disorder, including epilepsy, is prevalent in long-term care residences, and rescue medications can be used for on-site treatment. Diazepam rectal gel, intranasal midazolam, and diazepam nasal spray are US Food and Drug Administration (FDA)-approved seizure-cluster rescue medications, and intravenous diazepam and lorazepam are approved for status epilepticus. Benzodiazepines differ by formulation, route of administration, absorption, and metabolism. Intranasal formulations are easy and ideal for public use and when rectal treatment is challenging (eg, wheelchair). Intranasal, intrabuccal, and rectal formulations do not require specialized training to administer and are easier for staff at all levels of training compared with intravenous treatment. Off-label rescue medications may have anecdotal support; however, potential disadvantages include variable absorption and onset of action as well as potential risks to patients and caregivers/care partners. Delivery of intravenous-administered rescue medications is delayed by the time needed to set up and deliver the medication and is subject to dosing errors. Seizure action plans that include management of acute seizures can optimize the quality and timing of treatment, which may reduce emergency service needs and prevent progression to status epilepticus. CONCLUSIONS AND IMPLICATIONS Seizure disorder is prevalent across all ages but is increased in older adults and in those with intellectual and developmental disabilities. Prompt intervention may reduce negative outcomes associated with acute unexpected seizures and seizure clusters. Seizure action plans that include acute seizures can improve the treatment response by detailing the necessary information for staff to provide immediate treatment.
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Affiliation(s)
- R Eugene Ramsay
- International Center for Epilepsy, St. Bernard Parish Medical Center, New Orleans, LA, USA.
| | - Danielle Becker
- Department of Neurology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Blanca Vazquez
- Comprehensive Epilepsy Center, New York University, New York, NY, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, USA
| | | | - Enrique Carrazana
- Neurelis, Inc, San Diego, CA, USA; John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
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Sherwin CM, Tran NK, Sullivan K, Wead S, Birnbaum AK, Avachat C, Healy DP, Kagan RJ. Exploring the Past to Inform the Future to Optimize the Pharmacokinetics of Vancomycin in Children With Severe Burn Injuries. J Burn Care Res 2023; 44:353-362. [PMID: 36194537 DOI: 10.1093/jbcr/irac147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Indexed: 11/12/2022]
Abstract
Sepsis remains one of the leading causes of death among pediatric patients with burn injuries. Despite limited vancomycin pharmacokinetic (PK) information within this population, it is widely used to treat severe burn injuries. Those with severe burns are at risk of nephrotoxicity, with an incidence of acute kidney injury (AKI) over 50%. Delivering an effective vancomycin dose and avoiding unnecessary toxicity is essential for improved patient outcomes. This was a retrospective analysis of 115 children aged 0.2 months to 18 years with severe burns, >10% total body surface area. Vancomycin was given via intravenous infusion; blood samples were drawn between 6- and 12-hour postinfusion. A population pharmacokinetic model was developed using nonlinear mixed-effect modeling (Monolix, version 2016R1). A one-compartment model described a steady-state volume of distribution (V), dependent on weight. Vancomycin clearance (CL) was influenced by age and estimated creatinine clearance (CrCL). The study population's (median age = 4 years, median weight = 20 kg, median total body surface area (%TBSA) = 40%) median V and CL were calculated to be 1.25 L/kg (95% CI, 1.04-1.46) and 0.15 L/h/kg (95% CI, 0.126-0.165), respectively. The PK model was explicitly developed to characterize the impact of physiological changes in children under 18 years of age and the percentage of the burn surface area using limited data. The analysis determined that weight, age, and estimated CrCL were important covariates in predicting vancomycin PK with high variability in CL and V.
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Affiliation(s)
- Catherine M Sherwin
- Dept of Pediatrics, Boonshoft School of Medicine, Wright State University, Dayton, OH, USA.,Dayton Children's Hospital, Dayton, OhH, USA.,James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA.,Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Nam K Tran
- Department of Pathology and Laboratory Medicine, University of California, School of Medicine, Davis, CA, USA
| | - Kevin Sullivan
- University of Tennessee Medical Center and College of Pharmacy, Knoxville, TN, USA
| | | | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Charul Avachat
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Daniel P Healy
- James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, OH, USA
| | - Richard J Kagan
- The Shriners Hospitals for Children®, Dayton (Cincinnati), OH, USA.,Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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10
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Avachat C, Birnbaum AK. Women of childbearing age: What antiseizure medications are they taking? Br J Clin Pharmacol 2023; 89:46-48. [PMID: 36261929 PMCID: PMC10134405 DOI: 10.1111/bcp.15555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 09/02/2022] [Accepted: 09/18/2022] [Indexed: 11/28/2022] Open
Affiliation(s)
- Charul Avachat
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota, USA
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11
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Fike CD, Avachat C, Birnbaum AK, Aschner JL, Sherwin CM. Pharmacokinetics of L-Citrulline in Neonates at Risk of Developing Bronchopulmonary Dysplasia-Associated Pulmonary Hypertension. Paediatr Drugs 2023; 25:87-96. [PMID: 36316628 PMCID: PMC10039462 DOI: 10.1007/s40272-022-00542-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/02/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Options to treat pulmonary hypertension (PH) in neonates with bronchopulmonary dysplasia (BPD) are few and largely ineffective. Improving the bioavailability of nitric oxide (NO) might be an efficacious treatment for BPD-PH. When administered orally, the NO-L-arginine precursor, L-citrulline, increases NO production in children and adults, however, pharmacokinetic (PK) studies of oral L-citrulline have not been performed in infants and children. OBJECTIVES This study characterized the PK of enterally administered L-citrulline in neonates at risk of developing BPD-PH to devise a model-informed dosing strategy. METHODS AND RESULTS Ten premature neonates (≤ 28 weeks gestation) were administered a single dose of 150 mg/kg (powder form solubilized in sterile water) oral L-citrulline at 32 ± 1 weeks postmenstrual age. Due to the need to limit blood draws, time windows were used to maximize the sampling over the dosing interval by assigning neonates to one of two groups (ii) samples collected pre-dose and at 1- and 2.5-h post-dose, and (ii) pre-dose and 0.25- and 3-h post-dose. The L-arginine concentrations (µmol/L) and the L-citrulline (µmol/L) plasma concentration-time data were evaluated using non-compartmental analysis (Phoenix WinNonlin version 8.1). Optimal dosage strategies were derived using a simulation-based methodology. Simulated doses of 51.5 mg or 37.5 mg/kg given four times a day produced steady-state concentrations close to a target of 50 µmol/L. The volume of distribution (V/F) and clearance (CL/F) were 302.89 ml and 774.96 ml/h, respectively, with the drug exhibiting a half-life of 16 minutes. The AUC from the time of dosing to the time of last concentration was 1473.3 h*μmol/L, with Cmax and Tmax of 799 μmol/L and 1.55 h, respectively. CONCLUSION This is the first PK study in neonates presenting data that can be used to inform dosing strategies in future randomized controlled trials evaluating enteral L-citrulline as a potential treatment to reduce PH associated with BPD in premature neonates. REGISTRATION Clinical trials.gov Identifier: NCT03542812.
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Affiliation(s)
- Candice D Fike
- Department of Pediatrics, The University of Utah Health, Salt Lake City, UT, USA
| | - Charul Avachat
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Angela K Birnbaum
- Department of Pediatrics, The University of Utah Health, Salt Lake City, UT, USA
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Judy L Aschner
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Pediatrics, Hackensack Meridian School of Medicine, Nutley, NJ, USA
| | - Catherine M Sherwin
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA.
- Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton, OH, USA.
- Dayton Children's Hospital, Dayton, OH, USA.
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12
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Leppik IE, Birnbaum AK, Svensden K, Eberly LE. New Onset (Incidence) of Epilepsy and Seizures in Nursing Home Residents. J Am Med Dir Assoc 2022; 23:1589.e11-1589.e15. [PMID: 35779573 PMCID: PMC10069272 DOI: 10.1016/j.jamda.2022.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 05/27/2022] [Accepted: 06/01/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The point prevalence of epilepsy is high in nursing homes (NH), but the incidence of epilepsy after admission is unknown. This study was done to determine the incidence of epilepsy/seizure (epi/sz) comorbid with other conditions in older adult NH residents. DESIGN Retrospective evaluation of Minimum Data Set records to identify new onset epi/sz in NH residents. SETTING AND PARTICIPANTS Five cross-sectional cohorts of all residents in any Medicare/Medicaid certified NH in the United States on July 15 of each year 2003-2007. MEASURES Epi/sz was identified by International Classification of Diseases, Ninth Revision codes (345.xx or 780.39) or check box on the Minimum Data Set. Those with no such code on admission and with 1 to 3 plus years of follow-up (n = 3,609,422) were followed through 2007 or end of stay. RESULTS Overall incidence of epi/sz was 16.42/1000 patient years (PY). Incidence was highest in the first year after admission and declined thereafter. There were more women (n = 2,523,951) than men (n = 1,089,631), but men had a higher incidence (21.17/1000PY) compared with women (14.81/1000PY). Although the 65‒74 years of age cohort included fewer residents (n = 594,722) compared with the age 85 years + cohort (n = 1,520,167), the younger residents had the highest incidence (28.53/1000 PY) compared with the oldest, 10.22/1000 PY for the age 85+ years cohort. The highest incidences were among those with brain tumor (122.55/1000PY), followed by head injury (45.66/1000PY). Overall, 714,340 had a diagnosis of stroke, and incidence was 27.52/1000PY. Those with none of selected risk factors had an overall incidence of 12.45/1000PY. CONCLUSIONS AND IMPLICATIONS The incidence of epi/sz in older individuals after admission to a NH is high. There is a need to develop practice approaches to best manage this large cohort. There does not appear to be a uniform approach to managing new onset epilepsy in NHs at this time. Studies to develop evidence for practice guidelines are needed.
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Affiliation(s)
- Ilo E Leppik
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA; Department of Neurology, University of Minnesota, Minneapolis, MN, USA.
| | - Angela K Birnbaum
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Kenneth Svensden
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Lynn E Eberly
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, USA
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13
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Pennell PB, Karanam A, Meador KJ, Gerard E, Kalayjian L, Penovich P, Matthews A, McElrath TM, Birnbaum AK. Antiseizure Medication Concentrations During Pregnancy: Results From the Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) Study. JAMA Neurol 2022; 79:370-379. [PMID: 35157004 PMCID: PMC8845026 DOI: 10.1001/jamaneurol.2021.5487] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
IMPORTANCE During pregnancy in women with epilepsy, lower blood concentrations of antiseizure medications can have adverse clinical consequences. OBJECTIVE To characterize pregnancy-associated concentration changes for several antiseizure medications among women with epilepsy. DESIGN, SETTING, AND PARTICIPANTS Enrollment in this prospective, observational cohort study, Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD), occurred from December 19, 2012, to February 11, 2016, at 20 US sites. Enrolled cohorts included pregnant women with epilepsy and nonpregnant control participants with epilepsy. Inclusion criteria were women aged 14 to 45 years, an intelligence quotient greater than 70 points, and, for the cohort of pregnant women, a fetal gestational age younger than 20 weeks. A total of 1087 women were assessed for eligibility; 397 were excluded and 230 declined. Data were analyzed from May 1, 2014, to June 30, 2021. EXPOSURE Medication plasma concentrations in women taking monotherapy or in combination with noninteracting medications. The cohort of pregnant women was monitored through 9 months post partum, with similar time points for control participants. MAIN OUTCOMES AND MEASURES Dose-normalized concentrations were calculated as total or unbound plasma medication concentrations divided by total daily dose. Phlebotomy was performed during 4 pregnancy study visits and 3 postpartum visits for the pregnant women and 7 visits over 18 months for control participants. The primary hypothesis was to test pregnancy changes of dose-normalized concentrations from nonpregnant postpartum samples compared with those of control participants. RESULTS Of the 351 pregnant women and 109 control participants enrolled in MONEAD, 326 pregnant women (median [range] age, 29 [19-43] years) and 104 control participants (median [range] age, 29 [16-43] years) met eligibility criteria for this analysis. Compared with postpartum values, dose-normalized concentrations during pregnancy were decreased by up to 56.1% for lamotrigine (15.60 μg/L/mg to 6.85 μg/L/mg; P < .001), 36.8% for levetiracetam (11.33 μg/L/mg to 7.16 μg/L/mg; P < .001), 17.3% for carbamazepine (11.56 μg/L/mg to 7.97 μg/L/mg; P = .03), 32.6% for oxcarbazepine (11.55 μg/L/mg to 7.79 μg/L/mg; P < .001), 30.6% for unbound oxcarbazepine (6.15 μg/L/mg to 4.27 μg/L/mg; P < .001), 39.9% for lacosamide (26.14 μg/L/mg to 15.71 μg/L/mg; P < .001), and 29.8% for zonisamide (40.12 μg/L/mg to 28.15 μg/L/mg; P < .001). No significant changes occurred for unbound carbamazepine, carbamazepine-10,11-epoxide, and topiramate, although a decrease was observed for topiramate (29.83 μg/L/mg to 13.77 μg/L/mg; P = .18). Additionally, compared with dose-normalized concentrations from control participants, pregnancy dose-normalized median (SE) concentrations decreased significantly by week of gestational age: carbamazepine, -0.14 (0.06) μg/L/mg (P = .02); carbamazepine unbound, -0.04 (0.01) μg/L/mg (P = .01); lacosamide, -0.23 (0.07) μg/L/mg (P < .001); lamotrigine, -0.20 (0.02) μg/L/mg (P < .001); levetiracetam, -0.06 (0.03) μg/L/mg (P = .01); oxcarbazepine, -0.14 (0.04) μg/L/mg (P < .001); oxcarbazepine unbound, -0.11 (0.03) μg/L/mg (P < .001); and zonisamide, -0.53 (0.14) μg/L/mg (P < .001) except for topiramate (-0.35 [0.20] μg/L/mg per week) and carbamazepine-10,11-epoxide (0.02 [0.01] μg/L/mg). CONCLUSIONS AND RELEVANCE Study results suggest that therapeutic drug monitoring should begin early in pregnancy and that increasing doses of these anticonvulsants may be needed throughout the course of pregnancy.
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Affiliation(s)
- Page B Pennell
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.,Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Ashwin Karanam
- Department of Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis
| | - Kimford J Meador
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Palo Alto, California
| | - Elizabeth Gerard
- Department of Neurology, Northwestern University, Chicago, Illinois
| | - Laura Kalayjian
- Department of Neurology, University of Southern California, Los Angeles
| | | | | | - Thomas M McElrath
- Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis
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14
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Singkham N, Avihingsanon A, Brundage RC, Birnbaum AK, Thammajaruk N, Ruxrungtham K, Bunupuradah T, Kiertiburanakul S, Chetchotisakd P, Punyawudho B. Pharmacogenetics-based population pharmacokinetic analysis for dose optimization of ritonavir-boosted atazanavir in Thai adult HIV-infected patients. Expert Rev Clin Pharmacol 2021; 15:99-108. [PMID: 34727835 DOI: 10.1080/17512433.2022.2000858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND This population pharmacokinetic-pharmacogenetic study aimed to investigate the optimal dose of RTV-boosted ATV (ATV/RTV) for Thai adult HIV-infected patients. METHODS A total of 1460 concentrations of ATV and RTV from 544 patients receiving an ATV/RTV-based regimen were analyzed. The CYP3A5 6986 A > G, ABCB1 3435 C > T, ABCB1 2677 G > T, SLCO1B1 521 T > C, and NR1I2 63396 C > T were genotyped. A population pharmacokinetic model was performed using a nonlinear mixed-effect model (NONMEM®). Monte Carlo simulations were conducted to compare the percentages of patients achieving the therapeutic range of ATV through concentrations (Ctrough). RESULTS The apparent oral clearance of ATV (CL/FATV) without RTV was 7.69 L/h with interindividual variability (IIV) of 28.7%. Patients with CYP3A5 6986 GG had a 7.1% lower CL/FATV than those with AA or AG genotype. The CL/FATV decreased by 10.8% for females compared with males. Simulation results showed higher percentages (~70%) of patient receiving doses of 200/100 or 200/50 mg achieved the target ATV Ctrough, while more patients (~40%) receiving a standard dose (300/100 mg) had ATV Ctrough above this target. CONCLUSIONS Both CYP3A5 6986 A > G and female decreased CL/FATV in Thai HIV-infected patients. Simulations supported that the reduced dose of ATV/RTV was sufficient to achieve the target concentration for Thai population.
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Affiliation(s)
- Noppaket Singkham
- Department of Pharmaceutical Care, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, Thailand.,School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
| | - Anchalee Avihingsanon
- HIV Netherlands Australia Thailand Research Collaboration, Thai Red Cross AIDS Research Centre, Bangkok, Thailand.,Tuberculosis Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Richard C Brundage
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, USA
| | - Narukjaporn Thammajaruk
- HIV Netherlands Australia Thailand Research Collaboration, Thai Red Cross AIDS Research Centre, Bangkok, Thailand
| | - Kiat Ruxrungtham
- HIV Netherlands Australia Thailand Research Collaboration, Thai Red Cross AIDS Research Centre, Bangkok, Thailand.,Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Torsak Bunupuradah
- HIV Netherlands Australia Thailand Research Collaboration, Thai Red Cross AIDS Research Centre, Bangkok, Thailand
| | | | | | - Baralee Punyawudho
- Department of Pharmaceutical Care, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, Thailand
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15
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Barry JM, Birnbaum AK, Jasin LR, Sherwin CM. Maternal Exposure and Neonatal Effects of Drugs of Abuse. J Clin Pharmacol 2021; 61 Suppl 2:S142-S155. [PMID: 34396555 DOI: 10.1002/jcph.1928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 06/17/2021] [Indexed: 11/08/2022]
Abstract
The public health crisis of pregnant women being exposed to drugs of abuse and of its impact on their unborn children continues to grow at an alarming rate globally. The state of pregnancy is unique, with physiological changes that can lead to changes in the way drugs are handled by the body in both pharmacokinetics and response. These changes place the pregnant woman, fetus, and newborn infant at risk, as many of these drugs can cross the placenta and into breast milk. The substances most commonly linked to harmful effects include alcohol, tobacco, cannabis, stimulants, and opioids. The pharmacological and toxicological changes caused by in utero exposure or breastfeeding exposure are difficult to study, and the full extent of the mechanisms involved are not fully understood. However, these changes can significantly affect the risks of substance abuse and influence optimal treatment of pregnant women with a substance use disorder. In addition, newborns who were exposed to drugs of abuse in utero can experience withdrawal syndromes. Pharmacological management in infants is used to guide and treat withdrawal symptoms, with the goal being to improve the infant's sleep, eating, and comfort. Several barriers may prevent pregnant women from seeking help for substance use, including stigma and interactions with the legal system. Understanding changes in pharmacology, including pharmacokinetic changes that happen during pregnancy, is essential for anticipating the extent of maternal exposure and neonatal adverse effects.
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Affiliation(s)
- Jessica M Barry
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minnesota, Minneapolis, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minnesota, Minneapolis, USA
| | - Lisa R Jasin
- Neonatal Intensive Care Unit, Dayton Children's Hospital, Dayton, Ohio, USA
| | - Catherine M Sherwin
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minnesota, Minneapolis, USA.,Department of Pediatrics, Wright State University, Boonshoft School of Medicine, Dayton Children's Hospital, Dayton, Ohio, USA
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16
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Zylla DM, Eklund J, Gilmore G, Gavenda A, Guggisberg J, VazquezBenitez G, Pawloski PA, Arneson T, Richter S, Birnbaum AK, Dahmer S, Tracy M, Dudek A. A randomized trial of medical cannabis in patients with stage IV cancers to assess feasibility, dose requirements, impact on pain and opioid use, safety, and overall patient satisfaction. Support Care Cancer 2021; 29:7471-7478. [PMID: 34085149 DOI: 10.1007/s00520-021-06301-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 05/14/2021] [Indexed: 12/17/2022]
Abstract
PURPOSE The prevalence of medical cannabis (MC) use in patients with cancer is growing, but questions about safety, efficacy, and dosing remain. Conducting randomized, controlled trials (RCTs) using state-sponsored MC programs is novel and could provide data needed to guide patients and providers. METHODS A pilot RCT of patients with stage IV cancer requiring opioids was conducted. Thirty patients were randomized 1:1 to early cannabis (EC, n = 15) versus delayed start cannabis (DC, n = 15). The EC group obtained 3 months (3 M) of MC through a state program at no charge, while the DC group received standard oncology care without MC for the first 3 M. Patients met with licensed pharmacists at one of two MC dispensaries to determine a suggested MC dosing, formulation, and route. Patients completed surveys on pain levels, opioid/MC use, side effects, and overall satisfaction with the study. RESULTS Interest in the study was high as 36% of patients who met eligibility criteria ultimately enrolled. The estimated mean daily THC and CBD allotments at 3 M were 34 mg and 17 mg, respectively. A higher proportion of EC patients achieved a reduction in opioid use and improved pain control. No serious safety issues were reported, and patients reported high satisfaction. CONCLUSION Conducting RCTs using a state cannabis program is feasible. The addition of MC to standard oncology care was well-tolerated and may lead to improved pain control and lower opioid requirements. Conducting larger RCTs with MC in state-sponsored programs may guide oncology providers on how to safely and effectively incorporate MC for interested patients.
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Affiliation(s)
- Dylan M Zylla
- The Cancer Research Center, HealthPartners/Park Nicollet, Minneapolis, MN, USA.
| | - Justin Eklund
- The Cancer Research Center, HealthPartners/Park Nicollet, Minneapolis, MN, USA
| | - Grace Gilmore
- The Cancer Research Center, HealthPartners/Park Nicollet, Minneapolis, MN, USA
| | - Alissa Gavenda
- The Cancer Research Center, HealthPartners/Park Nicollet, Minneapolis, MN, USA
| | - Jordan Guggisberg
- The Cancer Research Center, HealthPartners/Park Nicollet, Minneapolis, MN, USA
| | | | | | - Tom Arneson
- Minnesota Department of Health, Office of Medical Cannabis, St. Paul, MN, USA
| | - Sara Richter
- Professional Data Analysts, Minneapolis, MN, USA
| | | | - Stephen Dahmer
- Family Medicine & Community Health At the Icahn School of Medicine At Mount Sinai, New York, NY, USA.,Vireo Health International, Minneapolis, MN, USA
| | | | - Arkadiusz Dudek
- The Cancer Research Center, HealthPartners/Park Nicollet, Minneapolis, MN, USA
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17
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Barkley CM, Hu Z, Fieberg AM, Eberly LE, Birnbaum AK, Leppik IE, Marino SE. An association between resting state EEG parameters and the severity of topiramate-related cognitive impairment. Epilepsy Behav 2021; 114:107598. [PMID: 33268020 DOI: 10.1016/j.yebeh.2020.107598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/19/2020] [Accepted: 10/24/2020] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Many commonly prescribed drugs cause cognitive deficits. We investigated whether parameters of the resting-state electroencephalogram (rsEEG) are related to the severity of cognitive impairments associated with administration of the antiseizure drug topiramate (TPM) and the benzodiazepine lorazepam (LZP). METHODS We conducted a double-blind, randomized, placebo-controlled crossover study. After a baseline visit, subjects completed three sessions at which they received either a single dose of TPM, LZP, or placebo. Four-hours after drug administration and at baseline, subjects completed a working memory (WM) task after their rsEEG was recorded. After quantifying drug-related behavioral (WM accuracy (ACC)/reaction time (RT)) and electrophysiological (alpha, theta, beta (1,2), gamma power) change for each subject, we constructed drug-specific mixed effects models of change for each WM and EEG measure. Regression models were constructed to characterize the relationship between baseline rsEEG measures and drug-related performance changes. RESULTS Linear mixed effects models showed theta power increases in response to TPM administration. The results of the regression models revealed a number of robust relationships between baseline rsEEG parameters and TPM-related, but not LZP-related, WM impairment. CONCLUSIONS We showed for the first time that parameters of the rsEEG are associated with the severity of TPM-related WM deficits; this suggests that rsEEG measures may have novel clinical applications in the future.
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Affiliation(s)
- Christopher M Barkley
- Center for Clinical and Cognitive Neuropharmacology, Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, 308 Harvard Street, Minneapolis, MN 55455, United States.
| | - Zhenhong Hu
- Department of Biomedical Engineering, University of Florida, 1275 Center Drive, Gainesville, FL 32611, United States
| | - Ann M Fieberg
- Division of Biostatistics, University of Minnesota, 429 Delaware Street SE, Minneapolis, MN 55455, United States.
| | - Lynn E Eberly
- Division of Biostatistics, University of Minnesota, 429 Delaware Street SE, Minneapolis, MN 55455, United States.
| | - Angela K Birnbaum
- Center for Clinical and Cognitive Neuropharmacology, Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, 308 Harvard Street, Minneapolis, MN 55455, United States.
| | - Ilo E Leppik
- Center for Clinical and Cognitive Neuropharmacology, Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, 308 Harvard Street, Minneapolis, MN 55455, United States.
| | - Susan E Marino
- Center for Clinical and Cognitive Neuropharmacology, Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, 308 Harvard Street, Minneapolis, MN 55455, United States.
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18
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Pennell PB, French JA, May RC, Gerard E, Kalayjian L, Penovich P, Gedzelman E, Cavitt J, Hwang S, Pack AM, Sam M, Miller JW, Wilson SH, Brown C, Birnbaum AK, Meador KJ. Changes in Seizure Frequency and Antiepileptic Therapy during Pregnancy. N Engl J Med 2020; 383:2547-2556. [PMID: 33369356 PMCID: PMC7919187 DOI: 10.1056/nejmoa2008663] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Among women with epilepsy, studies regarding changes in seizure frequency during pregnancy have been limited by the lack of an appropriate nonpregnant comparator group to provide data on the natural course of seizure frequency in both groups. METHODS In this prospective, observational, multicenter cohort study, we compared the frequency of seizures during pregnancy through the peripartum period (the first 6 weeks after birth) (epoch 1) with the frequency during the postpartum period (the following 7.5 months after pregnancy) (epoch 2). Nonpregnant women with epilepsy were enrolled as controls and had similar follow-up during an 18-month period. The primary outcome was the percentage of women who had a higher frequency of seizures that impaired awareness during epoch 1 than during epoch 2. We also compared changes in the doses of antiepileptic drugs that were administered in the two groups during the first 9 months of epoch 1. RESULTS We enrolled 351 pregnant women and 109 controls with epilepsy. Among the 299 pregnant women and 93 controls who had a history of seizures that impaired awareness and who had available data for the two epochs, seizure frequency was higher during epoch 1 than during epoch 2 in 70 pregnant women (23%) and in 23 controls (25%) (odds ratio, 0.93; 95% confidence interval [CI], 0.54 to 1.60). During pregnancy, the dose of an antiepileptic drug was changed at least once in 74% of pregnant women and in 31% of controls (odds ratio, 6.36; 95% CI, 3.82 to 10.59). CONCLUSIONS Among women with epilepsy, the percentage who had a higher incidence of seizures during pregnancy than during the postpartum period was similar to that in women who were not pregnant during the corresponding epochs. Changes in doses of antiepileptic drugs occurred more frequently in pregnant women than in nonpregnant women during similar time periods. (Funded by the National Institutes of Health; MONEAD ClinicalTrials.gov number, NCT01730170.).
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Affiliation(s)
- Page B Pennell
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Jacqueline A French
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Ryan C May
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Elizabeth Gerard
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Laura Kalayjian
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Patricia Penovich
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Evan Gedzelman
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Jennifer Cavitt
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Sean Hwang
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Alison M Pack
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Maria Sam
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - John W Miller
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Steffanie H Wilson
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Carrie Brown
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Angela K Birnbaum
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
| | - Kimford J Meador
- From Brigham and Women's Hospital, Harvard Medical School, Boston (P.B.P.); New York University Comprehensive Epilepsy Center (J.A.F.) and Columbia University (A.M.P.), New York, and Northwell Health, Great Neck (S.H.) - both in New York; Emmes, Rockville, MD (R.C.M., S.H.W., C.B.); Northwestern University, Chicago (E. Gerard); the University of Southern California, Los Angeles (L.K.), and Stanford University, Palo Alto (K.J.M.) - both in California; the Minnesota Epilepsy Group, St. Paul (P.P.), and the University of Minnesota, Minneapolis (A.K.B.); Emory University School of Medicine, Atlanta (E. Gedzelman); the University of Cincinnati, Cincinnati (J.C.); Wake Forest University, Winston-Salem, NC (M.S.); and the University of Washington, Seattle (J.W.M.)
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Birnbaum AK, Meador KJ, Pennell PB. Exposure of Infants Who Are Breastfed to Antiepileptic Drugs-Reply. JAMA Neurol 2020; 77:1578. [PMID: 32852542 PMCID: PMC8694359 DOI: 10.1001/jamaneurol.2020.3033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis
| | | | - Page B Pennell
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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Birnbaum AK, Meador KJ, Karanam A, Brown C, May RC, Gerard EE, Gedzelman ER, Penovich PE, Kalayjian LA, Cavitt J, Pack AM, Miller JW, Stowe ZN, Pennell PB. Antiepileptic Drug Exposure in Infants of Breastfeeding Mothers With Epilepsy. JAMA Neurol 2020; 77:441-450. [PMID: 31886825 DOI: 10.1001/jamaneurol.2019.4443] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Importance There is limited information on infant drug exposure via breastfeeding by mothers who are receiving antiepileptic drug therapy. Objective To provide direct, objective information on antiepileptic drug exposure through breast milk. Design, Setting, and Participants This prospective cohort study was conducted between December 2012 to October 2016, with follow-up in children until 6 years of age at 20 sites across the United States. Data were collected via an observational multicenter investigation (Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs [MONEAD]) of outcomes in pregnant mothers with epilepsy and their children. Pregnant women with epilepsy who were aged 14 to 45 years, had pregnancies that had progressed to less than 20 weeks' gestational age, and had measured IQ scores of more than 70 points were enrolled and followed up through pregnancy and 9 postpartum months. Their infants were enrolled at birth. Data were analyzed from May 2014 to August 2019. Exposures Antiepileptic drug exposure in infants who were breastfed. Main Outcomes and Measures The percentage of infant-to-mother concentration of antiepileptic drugs. Antiepileptic drug concentrations were quantified from blood samples collected from infants and mothers at the same visit, 5 to 20 weeks after birth. Concentrations of antiepileptic drugs in infants at less than the lower limit of quantification were assessed as half of the lower limit. Additional measures collected were the total duration of all daily breastfeeding sessions and/or the volume of pumped breast milk ingested from a bottle. Results A total of 351 women (of 865 screened and 503 eligible individuals) were enrolled, along with their 345 infants (179 female children [51.9%]; median [range] age, 13 [5-20] weeks). Of the 345 infants, 222 (64.3%) were breastfed; the data collection yielded 164 matching infant-mother concentration pairs from 138 infants. Approximately 49% of all antiepileptic drug concentrations in nursing infants were less than the lower limit of quantification. The median percentage of infant-to-mother concentration for all 7 antiepileptic drugs and 1 metabolite (carbamazepine, carbamazepine-10,11-epoxide, levetiracetam, lamotrigine, oxcarbazepine, topiramate, valproate, and zonisamide) ranged from 0.3% (range, 0.2%-0.9%) to 44.2% (range, 35.2%-125.3%). In multiple linear regression models, maternal concentration was a significant factor associated with lamotrigine concentration in infants (Pearson correlation coefficient, 0.58; P < .001) but not levetiracetam concentration in infants. Conclusions and Relevance Overall, antiepileptic drug concentrations in blood samples of infants who were breastfed were substantially lower than maternal blood concentrations. Given the well-known benefits of breastfeeding and the prior studies demonstrating no ill effects when the mother was receiving antiepileptic drugs, these findings support the breastfeeding of infants by mothers with epilepsy who are taking antiepileptic drug therapy.
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Affiliation(s)
- Angela K Birnbaum
- Experimental & Clinical Pharmacology, University of Minnesota, Minneapolis
| | - Kimford J Meador
- Department of Neurology & Neurological Sciences, Stanford University, Stanford, California
| | - Ashwin Karanam
- Experimental & Clinical Pharmacology, University of Minnesota, Minneapolis
| | | | - Ryan C May
- The Emmes Corporation, Rockville, Maryland
| | | | | | | | - Laura A Kalayjian
- Department of Neurology, University of Southern California, Los Angeles
| | | | | | - John W Miller
- Department of Neurology, University of Washington, Seattle.,Department of Neurological Surgery, University of Washington, Seattle
| | - Zachary N Stowe
- Department of Psychiatry, University of Wisconsin at Madison, Madison
| | - Page B Pennell
- Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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Callisto SP, Illamola SM, Birnbaum AK, Barkley CM, Bathena SPR, Leppik IE, Marino SE. Severity of Topiramate-Related Working Memory Impairment Is Modulated by Plasma Concentration and Working Memory Capacity. J Clin Pharmacol 2020; 60:1166-1176. [PMID: 32297992 DOI: 10.1002/jcph.1611] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 02/25/2020] [Indexed: 11/10/2022]
Abstract
Drug side effects that impair cognition can lead to diminished quality of life and discontinuation of therapy. Topiramate is an antiepileptic drug that elicits cognitive deficits more frequently than other antiepileptic drugs, impairing multiple cognitive domains including language, attention, and memory. Although up to 40% of individuals taking topiramate may experience cognitive deficits, we are currently unable to predict which individuals will be most severely affected before administration. The objective of this study was to show the contributions of plasma concentration and working memory capacity in determining the severity of an individual's topiramate-related cognitive impairment. Subjects were enrolled in a double-blind, placebo-controlled crossover study during which they received a single dose of either 100, 150, or 200 mg topiramate. Working memory function was assessed using a modified Sternberg working memory task with 3 memory loads administered 4 hours after dosing. After adjustment for differences in working memory capacity, each 1 μg/mL of topiramate plasma concentration was associated with a 3.6% decrease in accuracy for all memory loads. Placebo effects occurred as a function of working memory capacity, with individuals with high working memory capacity experiencing less severe placebo-related impairment compared with those with low working memory capacity. Our results demonstrate that severity of topiramate-related cognitive deficits occurs as a function of both drug exposure and baseline cognitive function. By identifying patient- and exposure-related characteristics that modulate the severity of cognitive side effects, topiramate dosing strategies may be individually tailored in the future to prevent unwanted cognitive impairment.
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Affiliation(s)
- Samuel P Callisto
- Experimental and Clinical Pharmacology Department, University of Minnesota, Minneapolis, Minnesota, USA
| | - Sílvia M Illamola
- Experimental and Clinical Pharmacology Department, University of Minnesota, Minneapolis, Minnesota, USA
| | - Angela K Birnbaum
- Experimental and Clinical Pharmacology Department, University of Minnesota, Minneapolis, Minnesota, USA
| | - Christopher M Barkley
- Experimental and Clinical Pharmacology Department, University of Minnesota, Minneapolis, Minnesota, USA
| | - Sai Praneeth R Bathena
- Experimental and Clinical Pharmacology Department, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ilo E Leppik
- Experimental and Clinical Pharmacology Department, University of Minnesota, Minneapolis, Minnesota, USA
| | - Susan E Marino
- Experimental and Clinical Pharmacology Department, University of Minnesota, Minneapolis, Minnesota, USA
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Meador KJ, Pennell PB, May RC, Van Marter L, McElrath TF, Brown C, Gerard E, Kalayjian L, Gedzelman E, Penovich P, Cavitt J, French J, Hwang S, Pack AM, Sam M, Birnbaum AK, Finnell R. Fetal loss and malformations in the MONEAD study of pregnant women with epilepsy. Neurology 2020; 94:e1502-e1511. [PMID: 31806691 PMCID: PMC7251524 DOI: 10.1212/wnl.0000000000008687] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 10/11/2019] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To examine occurrence of severe adverse fetal outcomes (SAO), including fetal loss and major congenital malformations (MCMs), in pregnant women with epilepsy (PWWE) vs healthy pregnant women (HPW). METHODS The Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) study is an NIH-funded, prospective, observational, multicenter investigation of pregnancy outcomes for both mother and child, which enrolled women December 2012 through January 2016. RESULTS The 351 PWWE had 365 conceptions, and 105 HPW had 109 conceptions. SAOs occurred more often in PWWE (7.9%) vs HPW (1.9%) (p = 0.025) with odds ratio (OR) 4.45 (95% confidence intervals [CI] 1.04-19.01). There were no significant differences for fetal loss (2.8% vs 0%, p = 0.126) or MCMs (5.2% vs 1.9%, p = 0.185; OR 2.86, 95% CI 0.65-12.53) individually. No fetal losses in PWWE appeared to be related to acute seizures. Outcomes were not affected by periconceptional folate, unplanned/unwanted pregnancies, prior maternal pregnancy history, or antiepileptic drug (AED) blood levels, except for an AED level effect for fetal loss that appeared to be due to polytherapy. Combined maternal or paternal family history of MCM was marginally associated with increased SAOs (p = 0.046). CONCLUSIONS The findings provide additional information on risks of SAOs in PWWE, assessing effects of both AED levels and periconceptional folate. Group differences in average enrollment gestational age could have affected fetal loss results. Analyses are limited by small sample sizes as the MONEAD study was not powered for these secondary outcomes. The large majority of pregnancies in women with epilepsy do not have SOAs.
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Affiliation(s)
- Kimford J Meador
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX.
| | - Page B Pennell
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Ryan C May
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Linda Van Marter
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Thomas F McElrath
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Carrie Brown
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Elizabeth Gerard
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Laura Kalayjian
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Evan Gedzelman
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Patricia Penovich
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Jennifer Cavitt
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Jacqueline French
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Sean Hwang
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Alison M Pack
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Maria Sam
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Angela K Birnbaum
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
| | - Richard Finnell
- From Stanford University (K.J.M.), CA; Brigham & Women's Hospital (P.B.P., L.V.M., T.F.M.), Harvard Medical School, Boston, MA; Emmes (R.C.M., C.B.), Rockville, MD; Northwestern University (E.G.), Evanston, IL; University of Southern California (L.K.), Los Angeles; Emory University (E.G.), Atlanta, GA; Minnesota Epilepsy Group (P.P.), St. Paul; University of Cincinnati (J.C.), OH; New York University (J.F.); Northwell Heath (S.H.); Columbia University (A.M.P.), New York, NY; Wake Forest University (M.S.), Winston-Salem, NC; University of Minnesota (A.K.B.), Minneapolis; and Baylor College of Medicine (R.F.), Houston, TX
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Illamola SM, Amaeze OU, Krepkova LV, Birnbaum AK, Karanam A, Job KM, Bortnikova VV, Sherwin CMT, Enioutina EY. Use of Herbal Medicine by Pregnant Women: What Physicians Need to Know. Front Pharmacol 2020; 10:1483. [PMID: 31998122 PMCID: PMC6962104 DOI: 10.3389/fphar.2019.01483] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 11/15/2019] [Indexed: 12/13/2022] Open
Abstract
About 80% of the consumers worldwide use herbal medicine (HMs) or other natural products. The percentage may vary significantly (7%-55%) among pregnant women, depending upon social status, ethnicity, and cultural traditions. This manuscript discusses the most common HMs used by pregnant women, and the potential interactions of HMs with conventional drugs in some medical conditions that occur during pregnancy (e.g., hypertension, asthma, epilepsy). It also includes an examination of the characteristics of pregnant HM consumers, the primary conditions for which HMs are taken, and a discussion related to the potential toxicity of HMs taken during pregnancy. Many cultures have used HMs in pregnancy to improve wellbeing of the mother and/or baby, or to help decrease nausea and vomiting, treat infection, ease gastrointestinal problems, prepare for labor, induce labor, or ease labor pains. One of the reasons why pregnant women use HMs is an assumption that HMs are safer than conventional medicine. However, for pregnant women with pre-existing conditions like epilepsy and asthma, supplementation of conventional treatment with HMs may further complicate their care. The use of HMs is frequently not reported to healthcare professionals. Providers are often not questioning HM use, despite little being known about the HM safety and HM-drug interactions during pregnancy. This lack of knowledge on potential toxicity and the ability to interact with conventional treatments may impact both mother and fetus. There is a need for education of women and their healthcare professionals to move away from the idea of HMs not being harmful. Healthcare professionals need to question women on whether they use any HMs or natural products during pregnancy, especially when conventional treatment is less efficient and/or adverse events have occurred as herbal-drug interactions could be the reason for these observations. Additionally, more preclinical and clinical studies are needed to evaluate HM efficacy and toxicity.
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Affiliation(s)
- Sílvia M Illamola
- Division of Clinical Pharmacology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, United States.,Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, United States
| | - Ogochukwu U Amaeze
- Department of Clinical Pharmacy and Biopharmacy, Faculty of Pharmacy, University of Lagos, Lagos, Nigeria
| | - Lubov V Krepkova
- Center of Medicine, All-Russian Research Institute of Medicinal and Aromatic Plants (VILAR), Moscow, Russia
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, United States
| | - Ashwin Karanam
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, United States
| | - Kathleen M Job
- Division of Clinical Pharmacology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, United States
| | - Valentina V Bortnikova
- Center of Medicine, All-Russian Research Institute of Medicinal and Aromatic Plants (VILAR), Moscow, Russia
| | - Catherine M T Sherwin
- Division of Clinical Pharmacology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, United States.,Department of Pharmacotherapy, College of Pharmacy, University of Utah, Salt Lake City, UT, United States
| | - Elena Y Enioutina
- Division of Clinical Pharmacology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, United States.,Department of Pathology, School of Medicine, University of Utah, Salt Lake City, UT, United States.,Pharmaceutics & Pharmaceutical Chemistry, College of Pharmacy, University of Utah, Salt Lake City, UT, United States
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24
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Illamola SM, Birnbaum AK, Sherwin CM. Generic drug products in paediatrics: Where are the data? Br J Clin Pharmacol 2019; 85:1871-1873. [PMID: 31281980 DOI: 10.1111/bcp.14036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/19/2019] [Accepted: 06/12/2019] [Indexed: 12/12/2022] Open
Affiliation(s)
- Sílvia M Illamola
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Catherine M Sherwin
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA.,Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton, OH, USA.,Dayton Children's Hospital, Dayton, OH, USA
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25
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Birnbaum AK, Karanam A, Marino SE, Barkley CM, Remmel RP, Roslawski M, Gramling‐Aden M, Leppik IE. Food effect on pharmacokinetics of cannabidiol oral capsules in adult patients with refractory epilepsy. Epilepsia 2019; 60:1586-1592. [DOI: 10.1111/epi.16093] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 06/01/2019] [Accepted: 06/03/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Angela K. Birnbaum
- Experimental and Clinical Pharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
- Center for Clinical and Cognitive Neuropharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
| | - Ashwin Karanam
- Experimental and Clinical Pharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
- Center for Clinical and Cognitive Neuropharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
| | - Susan E. Marino
- Experimental and Clinical Pharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
- Center for Clinical and Cognitive Neuropharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
| | - Christopher M. Barkley
- Experimental and Clinical Pharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
- Center for Clinical and Cognitive Neuropharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
| | - Rory P. Remmel
- Experimental and Clinical Pharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
- Center for Clinical and Cognitive Neuropharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
| | - Michaela Roslawski
- Experimental and Clinical Pharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
| | - Mary Gramling‐Aden
- MINCEP Epilepsy Care University of Minnesota Physicians Minneapolis Minnesota
| | - Ilo E. Leppik
- Experimental and Clinical Pharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
- Center for Clinical and Cognitive Neuropharmacology College of Pharmacy University of Minnesota Minneapolis Minnesota
- MINCEP Epilepsy Care University of Minnesota Physicians Minneapolis Minnesota
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26
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Baruffaldi F, Raleigh MD, King SJ, Roslawski MJ, Birnbaum AK, Hassler C, Carroll FI, Runyon SP, Winston S, Pentel PR, Pravetoni M. Formulation and Characterization of Conjugate Vaccines to Reduce Opioid Use Disorders Suitable for Pharmaceutical Manufacturing and Clinical Evaluation. Mol Pharm 2019; 16:2364-2375. [PMID: 31018096 DOI: 10.1021/acs.molpharmaceut.8b01296] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This study focused on formulating conjugate vaccines targeting oxycodone and heroin for technology transfer, good manufacturing practice (GMP), and clinical evaluation. Lead vaccines used the highly immunogenic carrier protein keyhole limpet hemocyanin (KLH), which poses formulation problems because of its size. To address this barrier to translation, an oxycodone-based hapten conjugated to GMP-grade subunit KLH (OXY-sKLH) and adsorbed on alum adjuvant was studied with regard to carbodiimide coupling reaction time, buffer composition, purification methods for conjugates, conjugate size, state of aggregation, and protein/alum ratio. Vaccine formulations were screened for post-immunization antibody levels and efficacy in reducing oxycodone distribution to the brain in rats. While larger conjugates were more immunogenic, their size prevented characterization of the haptenation ratio by standard analytical methods and sterilization by filtration. To address this issue, conjugation chemistry and vaccine formulation were optimized for maximal efficacy, and conjugate size was measured by dynamic light scattering prior to adsorption to alum. An analogous heroin vaccine (M-sKLH) was also optimized for conjugation chemistry, formulated in alum, and characterized for potency against heroin in rats. Finally, this study found that the efficacy of OXY-sKLH was preserved when co-administered with M-sKLH, supporting the proof of concept for a bivalent vaccine formulation targeting both heroin and oxycodone. This study suggests methods for addressing the unique formulation and characterization challenges posed by conjugating small molecules to sKLH while preserving vaccine efficacy.
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Affiliation(s)
- F Baruffaldi
- Hennepin Healthcare Research Institute , Minneapolis , Minnesota 55404 , United States
| | - M D Raleigh
- Hennepin Healthcare Research Institute , Minneapolis , Minnesota 55404 , United States
| | - S J King
- Hennepin Healthcare Research Institute , Minneapolis , Minnesota 55404 , United States
| | - M J Roslawski
- University of Minnesota College of Pharmacy , Minneapolis , Minnesota 55455 , United States
| | - A K Birnbaum
- University of Minnesota College of Pharmacy , Minneapolis , Minnesota 55455 , United States
| | - C Hassler
- RTI International , Research Triangle Park , North Carolina 27709-2194 , United States
| | - F I Carroll
- RTI International , Research Triangle Park , North Carolina 27709-2194 , United States
| | - S P Runyon
- RTI International , Research Triangle Park , North Carolina 27709-2194 , United States
| | - S Winston
- Winston Biopharmaceutical Consulting , 4475 Laguna Place #215 , Boulder , Colorado 80303 , United States
| | - P R Pentel
- Hennepin Healthcare Research Institute , Minneapolis , Minnesota 55404 , United States
| | - M Pravetoni
- Hennepin Healthcare Research Institute , Minneapolis , Minnesota 55404 , United States
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Babu Henry Samuel I, Barkley C, Marino SE, Wang C, Han SM, Birnbaum AK, Cibula JE, Ding M. Brain's compensatory response to drug-induced cognitive impairment. J Clin Exp Neuropsychol 2018; 40:1000-1012. [PMID: 29720037 PMCID: PMC6141311 DOI: 10.1080/13803395.2018.1458822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Topiramate (TPM), a frequently prescribed antiseizure medication, can cause severe cognitive side-effects. Though these side-effects have been studied behaviorally, the underlying neural mechanisms are unknown. In a double-blind, randomized, placebo-controlled, crossover study of TPM's impact on cognition, nine healthy volunteers completed three study sessions: a no-drug baseline session and two sessions during which they received either TPM or placebo. Electroencephalogram was recorded during each session while subjects performed a working-memory task with three memory-loads. RESULTS Comparing TPM with baseline we found the following results. (a) TPM administration led to declines in behavioral performance. (b) Fronto-central event-related potentials (ERP) elicited by probe stimuli, representing the primary task network activity, showed strong memory-load modulations at baseline, but the magnitude of these load-dependent modulations was significantly reduced during TPM session, suggesting drug-induced impairments of the primary task network. (c) ERP responses over bilateral fronto-temporal electrodes, which were not load sensitive at baseline, showed significant memory-load modulations after TPM administration, suggesting the drug-related recruitment of additional neural resources. (d) At fronto-central scalp sites, there was significant increase in response amplitude for low memory-load during TPM session compared to baseline, and the amplitude increase was dependent on TPM plasma concentration, suggesting that the primary task network became less efficient under TPM impact. (e) At bilateral fronto-temporal electrodes, there were no ERP differences when comparing low memory-load trials, but TPM administration led to an increase in ERP responses to high load, the magnitude of which was positively correlated with task performance, suggesting that the recruited neural resources were beneficial for task performance. Placebo-TPM comparison yielded similar effects albeit with generally reduced significance and effect sizes. CONCLUSION Our findings support the hypothesis that TPM impairs the primary task network by reducing its efficiency, which triggers compensatory recruitment of additional resources to maintain task performance.
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Affiliation(s)
- Immanuel Babu Henry Samuel
- a J. Crayton Pruitt Family Department of Biomedical Engineering , University of Florida , Gainesville , FL , USA
| | - Christopher Barkley
- b Center for Clinical and Cognitive Neuropharmacology , University of Minnesota , Minneapolis , MN , USA
| | - Susan E Marino
- b Center for Clinical and Cognitive Neuropharmacology , University of Minnesota , Minneapolis , MN , USA
| | - Chao Wang
- a J. Crayton Pruitt Family Department of Biomedical Engineering , University of Florida , Gainesville , FL , USA
| | - Sahng-Min Han
- a J. Crayton Pruitt Family Department of Biomedical Engineering , University of Florida , Gainesville , FL , USA
| | - Angela K Birnbaum
- b Center for Clinical and Cognitive Neuropharmacology , University of Minnesota , Minneapolis , MN , USA
| | - Jean E Cibula
- c Department of Neurology , University of Florida , Gainesville , FL , USA
| | - Mingzhou Ding
- a J. Crayton Pruitt Family Department of Biomedical Engineering , University of Florida , Gainesville , FL , USA
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28
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Ahn JE, Bathena SPR, Brundage RC, Conway JM, Leppik IE, Birnbaum AK. Iron supplements in nursing home patients associated with reduced carbamazepine absorption. Epilepsy Res 2018; 147:115-118. [PMID: 30327119 PMCID: PMC11006430 DOI: 10.1016/j.eplepsyres.2018.07.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 07/19/2018] [Accepted: 07/23/2018] [Indexed: 01/26/2023]
Abstract
Persons in nursing homes receive a number of medications that may interfere with the pharmacokinetics of carbamazepine (CBZ). The aim of our study was to determine factors that may affect the pharmacokinetics of CBZ in elderly nursing home patients. METHODS CBZ concentration data collected from 60 nursing homes across the US were evaluated. Inclusion criteria included residency in a nursing home for at least 2 months, age 65 years or older, a stable dosing regimen of CBZ for at least 4 weeks (considered steady state), available CBZ concentration, and complete information regarding all co-medications. Using a nonlinear mixed-effects model, the data were adequately described by a one-compartment model with first-order absorption and elimination. Goodness-of-fit plots, plausibility of parameter estimates, visual predictive check and nonparametric bootstrap were used to evaluate the models. MAIN FINDINGS The final data set consisted of 345 CBZ concentrations from 99 subjects (38 males, 61 females). The population estimate of apparent clearance (CL/F) for a 70-kg person was 3.69 L/hr (RSE 6.9%). Residents were receiving either immediate (93.9%) or extended release (6.1%) formulation of CBZ and the Ka of each formulation was fixed to literature values. Age, sex, and co-medications had no effect on CL/F and apparent volume of distribution. Iron supplementation, which was taken by 16% of the residents, resulted in a 33% decrease in bioavailability (p < 0.001). No other medications were found to have an effect. CONCLUSIONS Results from this pharmacokinetic study indicate that use of iron supplementation is associated with a reduction in absorption of CBZ and may need to be considered when dosing CBZ in patients taking iron supplementation.
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Affiliation(s)
- Jae Eun Ahn
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota, United States; Current affiliation: Pharmacometrics, Pfizer, Inc, Cambridge, Massachusetts, United States
| | - Sai Praneeth R Bathena
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota, United States
| | - Richard C Brundage
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota, United States
| | - Jeannine M Conway
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota, United States
| | - Ilo E Leppik
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota, United States; Department of Neurology, University of Minnesota, Minneapolis, Minnesota, United States
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, Minnesota, United States.
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Karanam A, Pennell PB, French JA, Harden CL, Allien S, Lau C, Barnard S, Callisto SP, Birnbaum AK. Lamotrigine clearance increases by 5 weeks gestational age: Relationship to estradiol concentrations and gestational age. Ann Neurol 2018; 84:556-563. [DOI: 10.1002/ana.25321] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 07/27/2018] [Accepted: 08/23/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Ashwin Karanam
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota; Minneapolis Minnesota
| | - Page B. Pennell
- Division of Epilepsy, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Jacqueline A. French
- Department of Neurology, New York University Comprehensive Epilepsy Center; New York
| | - Cynthia L. Harden
- Department of Neurology, Icahn School of Medicine at Mount Sinai; New York New York
| | - Stephanie Allien
- Division of Epilepsy, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School; Boston Massachusetts
| | - Connie Lau
- Department of Neurology, Northwell Health; Great Neck New York
| | - Sarah Barnard
- Department of Neurology, New York University Comprehensive Epilepsy Center; New York
| | - Samuel P. Callisto
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota; Minneapolis Minnesota
| | - Angela K. Birnbaum
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota; Minneapolis Minnesota
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Polepally AR, Brundage RC, Remmel RP, Leppik IE, Pennell PB, White JR, Ramsay RE, Kistner BM, Birnbaum AK. Lamotrigine pharmacokinetics following oral and stable-labeled intravenous administration in young and elderly adult epilepsy patients: Effect of age. Epilepsia 2018; 59:1718-1726. [PMID: 30101556 DOI: 10.1111/epi.14519] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/29/2018] [Accepted: 06/29/2018] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The objectives of this study were to investigate the effect of age on pharmacokinetic parameters of lamotrigine (LTG) and estimate parameter variability. METHODS Patients (>18 years old) who were already on a steady-state dose of LTG therapy with no interacting comedications were enrolled. Patients with significant cardiac disease, severe kidney dysfunction, or moderate-to-severe liver dysfunction were excluded. Fifty milligrams of a stable-labeled intravenous LTG formulation (SL-LTG) replaced 50 mg of a patient's normal daily oral LTG dose. Thirteen blood samples were collected in each person over 96 hours. SL-LTG and unlabeled LTG concentrations were measured simultaneously by gas chromatography-mass spectrometry. Concentration-time data were analyzed by nonlinear mixed-effects modeling (NONMEM version 7.3). RESULTS Twenty-eight patients representing 16 young (18-48 years old) and 12 elderly (63-87 years old) patients were included, yielding 382 unlabeled and 351 SL-LTG concentrations. A two-compartment model with first-order absorption and elimination adequately described the plasma concentration-time data. Bioavailability of oral LTG was approximately 74% and did not differ by age. LTG clearance was 27.2% lower in elderly than in young patients (1.80 L/h for a 70-kg patient). SIGNIFICANCE Although LTG bioavailability was not affected by age, LTG clearance was 27.2% lower in elderly versus young patients of comparable body weight, possibly indicating lower dosages being needed in this population.
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Affiliation(s)
- Akshanth R Polepally
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Richard C Brundage
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Rory P Remmel
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota.,Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Ilo E Leppik
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Page B Pennell
- Department of Neurology at Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | | | - R Eugene Ramsay
- Department of Neurology, University of Miami, Miami, Florida
| | - Brett M Kistner
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Angela K Birnbaum
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
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Raleigh MD, Laudenbach M, Baruffaldi F, Peterson SJ, Roslawski MJ, Birnbaum AK, Carroll FI, Runyon SP, Winston S, Pentel PR, Pravetoni M. Opioid Dose- and Route-Dependent Efficacy of Oxycodone and Heroin Vaccines in Rats. J Pharmacol Exp Ther 2018. [PMID: 29535156 DOI: 10.1124/jpet.117.247049] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Heroin and oxycodone abuse occurs over a wide range of drug doses and by various routes of administration characterized by differing rates of drug absorption. The current study addressed the efficacy of a heroin vaccine [morphine hapten conjugated to keyhole limpet hemocyanin (M-KLH)] or oxycodone vaccine [oxycodone hapten conjugated to keyhole limpet hemocyanin (OXY-KLH)] for reducing drug distribution to brain after intravenous heroin or oxycodone, or subcutaneous oxycodone. Rats immunized with M-KLH or keyhole limpet hemocyanin (KLH) control received an intravenous bolus dose of 0.26 or 2.6 mg/kg heroin. Vaccination with M-KLH increased retention of heroin and its active metabolites 6-acetylmorphine (6-AM) and morphine in plasma compared with KLH controls, and reduced total opioid (heroin + 6-AM + morphine) distribution to brain but only at the lower heroin dose. Immunization also protected against respiratory depression at the lower heroin dose. Rats immunized with OXY-KLH or KLH control received 0.22 or 2.2 mg/kg oxycodone intravenously, the molar equivalent of the heroin doses. Immunization with OXY-KLH significantly reduced oxycodone distribution to brain after either oxycodone dose, although the magnitude of effect of immunization at the higher oxycodone dose was small (12%). By contrast, vaccination with OXY-KLH was more effective when oxycodone was administered subcutaneously rather than intravenously, reducing oxycodone distribution to brain by 44% after an oxycodone dose of 2.3 mg/kg. Vaccination also reduced oxycodone-induced antinociception. These data suggest that the efficacy of OXY-KLH and M-KLH opioid vaccines is highly dependent upon opioid dose and route of administration.
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Affiliation(s)
- Michael D Raleigh
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Megan Laudenbach
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Federico Baruffaldi
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Samantha J Peterson
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Michaela J Roslawski
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Angela K Birnbaum
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - F Ivy Carroll
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Scott P Runyon
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Scott Winston
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Paul R Pentel
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
| | - Marco Pravetoni
- Minneapolis Medical Research Foundation, Minneapolis, Minnesota (M.D.R., M.L., F.B., S.J.P., P.R.P., M.P.); University of Minnesota College of Pharmacy, Minneapolis, Minnesota (M.J.R., A.K.B.); Research Triangle Institute, Research Triangle Park, North Carolina (F.I.C., S.P.R.); Winston Biopharmaceutical Consulting, Boulder, Colorado (S.W.); and University of Minnesota Medical School (P.R.P., M.P.), and Center for Immunology (M.P.), University of Minnesota, Minneapolis, Minnesota
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Conway JM, Eberly LE, Collins JF, Macias FM, Ramsay RE, Leppik IE, Birnbaum AK. Factors in Variability of Serial Gabapentin Concentrations in Elderly Patients with Epilepsy. Pharmacotherapy 2017; 37:1197-1203. [PMID: 28801938 PMCID: PMC9949609 DOI: 10.1002/phar.2012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES To characterize and quantify the variability of serial gabapentin concentrations in elderly patients with epilepsy. METHODS This study included 83 patients (age ≥ 60 yrs) from an 18-center randomized double-blind double-dummy parallel study from the Veterans Affairs Cooperative 428 Study. All patients were taking 1500 mg/day gabapentin. Within-person coefficient of variation (CV) in gabapentin concentrations, measured weekly to bimonthly for up to 52 weeks, then quarterly, was computed. Impact of patient characteristics on gabapentin concentrations (linear mixed model) and CV (linear regression) were estimated. RESULTS A total of 482 gabapentin concentration measurements were available for analysis. Gabapentin concentrations and intrapatient CVs ranged from 0.5 to 22.6 μg/ml (mean 7.9 μg/ml, standard deviation [SD] 4.1 μg/ml) and 2% to 79% (mean 27.9%, SD 15.3%), respectively, across all visits. Intrapatient CV was higher by 7.3% for those with a body mass index of ≥ 30 kg/m2 (coefficient = 7.3, p=0.04). CVs were on average 0.5% higher for each 1-unit higher CV in creatinine clearance (coefficient = 0.5, p=0.03) and 1.2% higher for each 1-hour longer mean time after dose (coefficient = 1.2, p=0.04). CONCLUSIONS Substantial intrapatient variability in serial gabapentin concentration was noted in elderly patients with epilepsy. Creatinine clearance, time of sampling relative to dose, and obesity were found to be positively associated with variability.
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Affiliation(s)
- Jeannine M. Conway
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota
| | - Lynn E. Eberly
- Division of Biostatistics, School of Public Health, University of Minnesota
| | | | | | | | - Ilo E. Leppik
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota,Department of Neurology, University of Minnesota
| | - Angela K. Birnbaum
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota
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Tak CR, Job KM, Schoen-Gentry K, Campbell SC, Carroll P, Costantine M, Brixner D, Birnbaum AK, Sherwin CMT. The impact of exposure to antidepressant medications during pregnancy on neonatal outcomes: a review of retrospective database cohort studies. Eur J Clin Pharmacol 2017; 73:1055-1069. [PMID: 28600701 DOI: 10.1007/s00228-017-2269-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 05/22/2017] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Concerns with prescription antidepressant use in pregnant women have instigated the examination of potential associations between fetal exposure to antidepressant medication and outcomes including preterm delivery, congenital malformations, perinatal and post-natal adverse events, persistent pulmonary hypertension, and mortality. The retrospective cohort model is an often utilized study design. The objective of this review is to evaluate the literature on antidepressant use in pregnancy conducted as retrospective cohorts in national/regional medical, or claims databases that assess neonatal and infant outcomes for agreement between studies, ultimately providing a methodological and outcomes summary for future scientific endeavors. METHODS PubMed was searched for literature relating to antidepressant use and infant outcomes from the earliest available date through July 15, 2016. Studies with a retrospective cohort design and conducted in national/regional medical or claims databases were included. Searched outcomes included preterm delivery, congenital malformations, low birth weight, small for gestational age, persistent pulmonary hypertension of the newborn, and other select adverse events comprising low Apgar score (5 min), convulsions/seizures, respiratory distress/problems, fetal mortality, and infant mortality. RESULTS Of the 784 studies identified, 36 retrospective cohort studies met eligibility criteria. An increase in preterm delivery and respiratory distress/problems and no increase in congenital malformation or fetal and infant death were associated with prenatal use of prescription antidepressants by majority consensus (at least 2/3 [67%] of studies). CONCLUSIONS While consensus indicates that perinatal prescription antidepressant use has consequences for the fetus and infant, there are notable inconsistencies in the literature. More investigations that address prenatal exposure to depression and other important covariates are needed.
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Affiliation(s)
- Casey R Tak
- Pharmacotherapy Outcomes Research Center, Department of Pharmacotherapy, College of Pharmacy, University of Utah, Salt Lake City, UT, USA.,Clinical Trials Office, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
| | - Kathleen M Job
- Division of Clinical Pharmacology, Department of Pediatrics, University of Utah of Medicine, SLC, Utah 295 Chipeta Way, Salt Lake City, UT, 84108, USA
| | - Katie Schoen-Gentry
- Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT, USA
| | - Sarah C Campbell
- Nelson Laboratories, Salt Lake City, UT, USA.,Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah Salt Lake City, Salt Lake City, UT, USA
| | - Patrick Carroll
- Women and Newborn Clinical Program, Department of Pediatrics, Dixie Regional Medical Center, Intermountain Healthcare, St. George, UT, USA.,Neonatal Services, Dixie Regional Medical Center, 544 East 400 South, St George, UT, 84770, USA
| | - Maged Costantine
- Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX, USA
| | - Diana Brixner
- Pharmacotherapy Outcomes Research Center, Department of Pharmacotherapy, College of Pharmacy, University of Utah, Salt Lake City, UT, USA.,Program in Personalized Health, Health Sciences Center, University of Utah, Salt Lake City, UT, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Catherine M T Sherwin
- Clinical Trials Office, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA. .,Division of Clinical Pharmacology, Department of Pediatrics, University of Utah of Medicine, SLC, Utah 295 Chipeta Way, Salt Lake City, UT, 84108, USA. .,Department of Pharmacology and Toxicology, College of Pharmacy, University of Utah Salt Lake City, Salt Lake City, UT, USA.
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Bathena SPR, Leppik IE, Kanner AM, Birnbaum AK. Antiseizure, antidepressant, and antipsychotic medication prescribing in elderly nursing home residents. Epilepsy Behav 2017; 69:116-120. [PMID: 28242474 PMCID: PMC5464952 DOI: 10.1016/j.yebeh.2017.01.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 01/24/2017] [Accepted: 01/25/2017] [Indexed: 12/18/2022]
Abstract
OBJECTIVE The incidence of epilepsy is highest in the elderly and the prevalence of epilepsy is higher in nursing home residents than in other cohorts. Co-medications that act in the central nervous system (CNS) are frequently prescribed in this population. The objective was to identify the most commonly prescribed antiseizure drugs (ASDs) and determine the frequency of use of antipsychotic and antidepressant medications in elderly nursing home residents receiving ASDs. METHODS Data were obtained from a pharmacy database serving 18,752 patients in Minnesota and Wisconsin nursing homes. Prescribing information was available on ASD, antidepressant, and antipsychotic drugs on one day in October 2013. The frequency distribution by age, formulation, trademarked/generic drugs, route of administration, and multiple drug combinations were determined. RESULTS Overall, 66.8% of 18,752 residents received at least one CNS-active drug as classified by the Generic Product Identifier classification system. For those 65years and older, ASDs were prescribed for 14.3% residents. Gabapentin comprised 7.3%; valproate 3.0%; levetiracetam 1.8%; and phenytoin 0.9%. An antidepressant was used in 64.2% of persons prescribed an ASD. Antidepressant use varied for specific ASDs and ranged from 50 to 75%. An antipsychotic medication was used in 30% of persons prescribed an ASD and ranged from 16.8 to 54.2% for specific ASDs. Both antidepressant and antipsychotic use occurred in 22.2% of persons prescribed an ASD, respectively. SIGNIFICANCE The pattern of CNS-active drug use has changed from previous years in this geographic region. Use of phenytoin has declined markedly, but antidepressant use has increased substantially. The CNS side effect profile of these medications and the possible long-term consequences in this population can greatly complicate their therapy.
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Affiliation(s)
- Sai Praneeth R Bathena
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, United States
| | - Ilo E Leppik
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, United States; MINCEP Epilepsy Care, Minneapolis, MN, United States; Department of Neurology, School of Medicine, University of Minnesota, United States
| | - Andres M Kanner
- Department of Neurology, Miller School of Medicine, University of Miami, United States
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, United States.
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Ahmed GF, Bathena SPR, Brundage RC, Leppik IE, Conway JM, Schwartz JB, Birnbaum AK. Pharmacokinetics and Saturable Absorption of Gabapentin in Nursing Home Elderly Patients. AAPS J 2017; 19:551-556. [PMID: 28070716 PMCID: PMC10118240 DOI: 10.1208/s12248-016-0022-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/22/2016] [Indexed: 12/26/2022] Open
Abstract
Pharmacokinetic data of gabapentin (GBP) in community-dwelling elderly patients show a significant effect of advanced age on GBP pharmacokinetics due to altered renal function. However, there are no data in elderly nursing home (NH) patients to evaluate gabapentin absorption and elimination. Our objective was to characterize the pharmacokinetics of GBP in elderly nursing home patients maintained on GBP therapy. This was a prospective pharmacokinetic study in elderly nursing home patients (≥60 years) receiving GBP for the management of chronic pain or epilepsy from seven nursing homes. Pharmacokinetic parameters were estimated by nonlinear mixed-effects modeling. A one-compartment model described the data and clearance (CL) was associated with estimated glomerular filtration rate (eGFR) (p < 0.0001). The GBP CL in elderly nursing home patients was 2.93 L/h. After adjusting for the effect of GFR, GBP CL was not affected by age, sex, body weight, or comorbidity scores. No significant effects of body size measures, age, and sex were detected on volume of distribution. Dose-dependent bioavailability of GBP was demonstrated, and the saturable absorption profile was described by a nonlinear hyperbolic function. Prediction-corrected visual predictive check (pc-VPC) suggests adequate fixed- and random-effects models that successfully simulated the mean trend and variability in gabapentin concentration-time profiles. In this analysis, the parameters of the hyperbolic nonlinearity appear to be similar between elderly and younger adults.
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Affiliation(s)
- Ghada F Ahmed
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Room 463, 717 Delaware St., SE, Minneapolis, Minnesota, 55414, USA
| | - Sai Praneeth R Bathena
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Room 463, 717 Delaware St., SE, Minneapolis, Minnesota, 55414, USA
| | - Richard C Brundage
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Room 463, 717 Delaware St., SE, Minneapolis, Minnesota, 55414, USA
| | - Ilo E Leppik
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Room 463, 717 Delaware St., SE, Minneapolis, Minnesota, 55414, USA.,Center for Clinical and Cognitive Neuropharmacology, University of Minnesota, Minneapolis, Minnesota, USA.,Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jeannine M Conway
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Room 463, 717 Delaware St., SE, Minneapolis, Minnesota, 55414, USA
| | - Janice B Schwartz
- Departments of Medicine and Bioengineering and Therapeutic Sciences, University of California, San Francisco and Jewish Home of San Francisco, San Francisco, California, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Room 463, 717 Delaware St., SE, Minneapolis, Minnesota, 55414, USA. .,Center for Clinical and Cognitive Neuropharmacology, University of Minnesota, Minneapolis, Minnesota, USA.
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Lim CN, Liang S, Feng K, Chittenden J, Henry A, Mouksassi S, Birnbaum AK. Phxnlme: An R package that facilitates pharmacometric workflow of Phoenix NLME analyses. Comput Methods Programs Biomed 2017; 140:121-129. [PMID: 28254068 DOI: 10.1016/j.cmpb.2016.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 10/27/2016] [Accepted: 12/06/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND AND OBJECTIVE Pharmacometric analyses are integral components of the drug development process, and Phoenix NLME is one of the popular software used to conduct such analyses. To address current limitations with model diagnostic graphics and efficiency of the workflow for this software, we developed an R package, Phxnlme, to facilitate its workflow and provide improved graphical diagnostics. METHODS Phxnlme was designed to provide functionality for the major tasks that are usually performed in pharmacometric analyses (i.e. nonlinear mixed effects modeling, basic model diagnostics, visual predictive checks and bootstrap). Various estimation methods for modeling using the R package are made available through the Phoenix NLME engine. The Phxnlme R package utilizes other packages such as ggplot2 and lattice to produce the graphical output, and various features were included to allow customizability of the output. Interactive features for some plots were also added using the manipulate R package. RESULTS Phxnlme provides enhanced capabilities for nonlinear mixed effects modeling that can be accessed using the phxnlme() command. Output from the model can be graphed to assess the adequacy of model fits and further explore relationships in the data using various functions included in this R package, such as phxplot() and phxvpc.plot(). Bootstraps, stratified up to three variables, can also be performed to obtain confidence intervals around the model estimates. With the use of an R interface, different R projects can be created to allow multi-tasking, which addresses the current limitation of the Phoenix NLME desktop software. In addition, there is a wide selection of diagnostic and exploratory plots in the Phxnlme package, with improvements in the customizability of plots, compared to Phoenix NLME. CONCLUSIONS The Phxnlme package is a flexible tool that allows implementation of the analytical workflow of Phoenix NLME with R, with features for greater overall efficiency and improved customizable graphics. Phxnlme is freely available for download on the CRAN repository (https://cran.r-project.org/web/packages/Phxnlme/).
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Affiliation(s)
- Chay Ngee Lim
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, 717 Delaware St SE Room 463, Minneapolis, MN, USA
| | - Shuang Liang
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, 717 Delaware St SE Room 463, Minneapolis, MN, USA
| | - Kevin Feng
- Pharsight, a Certara Company, Princeton, NJ, USA
| | | | - Ana Henry
- Pharsight, a Certara Company, Princeton, NJ, USA
| | | | - Angela K Birnbaum
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, 717 Delaware St SE Room 463, Minneapolis, MN, USA.
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Birnbaum AK, Leppik IE, Svensden K, Eberly LE. Prevalence of epilepsy/seizures as a comorbidity of neurologic disorders in nursing homes. Neurology 2017; 88:750-757. [PMID: 28108639 DOI: 10.1212/wnl.0000000000003629] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 11/22/2016] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To determine the prevalence of epilepsy/seizure (epi/sz) comorbid with other neurologic disorders in elderly nursing home residents and to examine demographic and regional variability and associations with clinical characteristics. METHODS We studied 5 cross-sectional cohorts of all residents in any Medicare/Medicaid-certified nursing home in the United States on July 15 of each year from 2003 to 2007. Epi/sz was identified by ICD-9 codes (345.xx or 780.39) or check box (Minimum Data Set). Epi/sz prevalence was stable across all years, so only 2007 data were examined further. Logistic regression with generalized estimating equations was used to model cross-sectional prevalence of epi/sz as a function of demographics and neurologic comorbidities of interest, with adjustment for clinical characteristics, including cognitive status, comorbidity burden, medication burden, and activities of daily living. RESULTS Point prevalence of epi/sz in 2007 was 7.7% (n = 91,372 of N = 1,186,579) differing by geographical region, race/ethnicity, age group, and sex. Neurologic conditions having the highest association with epi/sz were brain tumor (epi/sz prevalence 23.4%-35.2%), head injury (17.9%), hemiplegia (17.7%), and stroke (13.7%). Epi/sz comorbid with stroke or dementia had a strong decreasing association with age (65-74 years had ≈3.8-times higher odds of epi/sz than 85+ years). Activities of daily living, comorbidity burden, and cognition scores were worse in persons with than without epi/sz. CONCLUSIONS The prevalence of epi/sz in the elderly nursing home population is >7-fold higher compared to community-dwelling elderly and is 7 to 30 times higher among those with certain comorbid neurologic conditions. Demographics and clinical characteristics had weaker associations with epi/sz prevalence.
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Affiliation(s)
- Angela K Birnbaum
- From Experimental and Clinical Pharmacology (A.K.B., I.E.L.), College of Pharmacy, Department of Neurology (I.E.L.), and Division of Biostatistics (K.S., L.E.E.), School of Public Health, University of Minnesota, Minneapolis.
| | - Ilo E Leppik
- From Experimental and Clinical Pharmacology (A.K.B., I.E.L.), College of Pharmacy, Department of Neurology (I.E.L.), and Division of Biostatistics (K.S., L.E.E.), School of Public Health, University of Minnesota, Minneapolis
| | - Kenneth Svensden
- From Experimental and Clinical Pharmacology (A.K.B., I.E.L.), College of Pharmacy, Department of Neurology (I.E.L.), and Division of Biostatistics (K.S., L.E.E.), School of Public Health, University of Minnesota, Minneapolis
| | - Lynn E Eberly
- From Experimental and Clinical Pharmacology (A.K.B., I.E.L.), College of Pharmacy, Department of Neurology (I.E.L.), and Division of Biostatistics (K.S., L.E.E.), School of Public Health, University of Minnesota, Minneapolis
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Ahmed GF, Marino SE, Brundage RC, Pakhomov SVS, Leppik IE, Cloyd JC, Clark A, Birnbaum AK. Pharmacokinetic-pharmacodynamic modelling of intravenous and oral topiramate and its effect on phonemic fluency in adult healthy volunteers. Br J Clin Pharmacol 2016; 79:820-30. [PMID: 25403343 DOI: 10.1111/bcp.12556] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 11/07/2014] [Indexed: 11/26/2022] Open
Abstract
AIMS The aim was to develop a quantitative approach that characterizes the magnitude of and variability in phonemic generative fluency scores as measured by the Controlled Oral Word Association (COWA) test in healthy volunteers after administration of an oral and a novel intravenous (IV) formulation of topiramate (TPM). METHODS Nonlinear mixed-effects modelling was used to describe the plasma TPM concentrations resulting from oral or IV administration. A pharmacokinetic-pharmacodynamic (PK-PD) model was developed sequentially to characterize the effect of TPM concentrations on COWA with different distributional assumptions. RESULTS Topiramate was rapidly absorbed, with a median time to maximal concentration of 1 h and an oral bioavailability of ~100%. Baseline COWA score increased by an average of 12% after the third administration on drug-free sessions. An exponential model described the decline of COWA scores, which decreased by 14.5% for each 1 mg l(-1) increase in TPM concentration. The COWA scores were described equally well by both continuous normal and Poisson distributions. CONCLUSIONS This analysis quantified the effect of TPM exposure on generative verbal fluency as measured by COWA. Repetitive administration of COWA resulted in a better performance, possibly due to a learning effect. The model predicts a 27% reduction in the COWA score at the average observed maximal plasma concentration after a 100 mg dose of TPM. The single-dose administration of relatively low TPM doses and narrow range of resultant concentrations in our study were limitations to investigating the PK-PD relationship at higher TPM exposures. Hence, the findings may not be readily generalized to the broader patient population.
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Affiliation(s)
- Ghada F Ahmed
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
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Lim CN, Birnbaum AK, Brundage RC, Leppik IE, Cloyd JC, Clark A, Marino SE. Pharmacokinetic-Pharmacodynamic Modeling of Intravenous and Oral Topiramate and Its Effect on the Symbol-Digit Modalities Test in Adult Healthy Volunteers. J Clin Pharmacol 2015; 56:714-22. [PMID: 26395889 DOI: 10.1002/jcph.646] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/20/2015] [Indexed: 11/10/2022]
Abstract
A sequential pharmacokinetic-pharmacodynamic (PK-PD) modeling approach was used to quantify the effects of a single dose of topiramate (100 or 200 mg) on working memory, attention, and psychomotor speed as measured by the Symbol-Digit Modalities Test (SDMT). Established on data pooled from 3 randomized, crossover studies in healthy subjects (19-55 years of age), using both oral and a novel stable-labeled intravenous (IV) formulation of topiramate, an inhibitory Emax model was found to characterize the topiramate concentration-SDMT score relationship well. At the EC50 of 2.85 μg/mL, this topiramate plasma concentration value was estimated to be associated with a 25.5% reduction of SDMT score relative to baseline. Age was an important determinant of the baseline SDMT score, with an estimated decrease of 1.13% in baseline SDMT score with every year of age. Moreover, this approach enabled the quantification of the practice effect observed with repeated administration of the neuropsychological test over shorter testing intervals than have previously been reported in the literature. The finding of a significant effect following a single dose of topiramate in the range widely used to treat migraine and epilepsy needs to be evaluated in a broader patient population undergoing chronic treatment, as the narrow range of resultant concentrations limits the generalizability of the findings.
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Affiliation(s)
- Chay Ngee Lim
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Angela K Birnbaum
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA.,Center for Clinical and Cognitive Neuropharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Richard C Brundage
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Ilo E Leppik
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA.,Center for Clinical and Cognitive Neuropharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - James C Cloyd
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA.,Center for Orphan Drug Research, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Annie Clark
- Upsher Smith Laboratories, Minneapolis, MN, USA
| | - Susan E Marino
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA.,Center for Clinical and Cognitive Neuropharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
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40
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Polepally AR, Remmel RP, Brundage RC, Leppik IE, Rarick JO, Ramsay RE, Birnbaum AK. Steady-state pharmacokinetics and bioavailability of immediate-release and extended-release formulations of lamotrigine in elderly epilepsy patients: Use of stable isotope methodology. J Clin Pharmacol 2015; 55:1101-8. [PMID: 25903807 DOI: 10.1002/jcph.522] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 04/14/2015] [Indexed: 11/06/2022]
Abstract
A classic 2-period crossover bioavailability study was conducted to evaluate the relative and absolute bioavailability of immediate-release (IR) and extended-release (XR) lamotrigine formulations under steady-state conditions in elderly patients with epilepsy. On treatment days, each subject's morning dose (IR or XR lamotrigine) was replaced with an intravenous 50-mg dose of stable-labeled lamotrigine. Lamotrigine concentrations were measured at 13 points between 0 and 96 hours. XR and IR lamotrigine formulations were similar with respect to steady-state area under the concentration-time curve from 0 to 24 hours (AUC0-24 h ss), average concentration (Cavg, ss), and trough concentration (Cτ, ss). A 33% lower fluctuation in concentrations with XR was observed relative to IR lamotrigine. The time to peak concentration (Tmax, ss) was delayed for XR lamotrigine (3.0 vs 1.3 hours) with lower peak concentration (15% lower). The absolute bioavailability for IR and XR formulations was 73% and 92%, respectively. The formulations were bioequivalent with respect to AUC0-24 h ss, Cτ, ss, and Cavg, ss indicating that it may be possible to switch directly from IR to XR lamotrigine without changes in the total daily dose.
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Affiliation(s)
- Akshanth R Polepally
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Rory P Remmel
- Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Richard C Brundage
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Ilo E Leppik
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA.,Department of Neurology, University of Minnesota, Minneapolis, MN, USA
| | - John O Rarick
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - R Eugene Ramsay
- Department of Neurology, Ochsner Baptist Medical Center, New Orleans, LA, USA.,University of Miami, Miami, FL, USA
| | - Angela K Birnbaum
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
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41
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Leppik IE, Birnbaum AK. Treating epilepsy in the elderly: More art than science. Cleve Clin J Med 2014; 81:499-500. [DOI: 10.3949/ccjm.81a.14030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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42
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Conway JM, Birnbaum AK, Leppik IE, Pennell PB, White JR, Rarick JO, Remmel RP. Safety of an intravenous formulation of lamotrigine. Seizure 2014; 23:390-2. [PMID: 24560492 DOI: 10.1016/j.seizure.2014.01.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 01/23/2014] [Accepted: 01/24/2014] [Indexed: 10/25/2022] Open
Abstract
PURPOSE Intravenous (IV) formulations are useful when treating patients where oral administration is not possible and to study certain pharmacokinetic parameters such as bioavailability. We developed a stable-labeled IV formulation of lamotrigine (LTG) for studying pharmacokinetics in epilepsy patients. METHODS Stable-labeled IV LTG was given to 20 persons with epilepsy (6 men; 14 women) with a mean age of 34.8 years (SD 11.7). A 50mg dose of LTG (stable labeled) was given intravenously and replaced 50mg of the regular morning oral dose of LTG (unlabeled, commercially available formulation). RESULTS No significant changes in blood pressure, heart rate, or adverse events including rash were attributed to administration of a 50-mg dose of the intravenous LTG formulation. CONCLUSION Our results show that LTG base that is complexed with 2-hydroxypropyl-β-cyclodextrin and stable-labeled can be given safely as a tracer replacement dose.
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Affiliation(s)
- Jeannine M Conway
- Experimental and Clinical Pharmacology, 308 Harvard Street SE, Minneapolis, MN 55455, United States
| | - Angela K Birnbaum
- Experimental and Clinical Pharmacology, 308 Harvard Street SE, Minneapolis, MN 55455, United States.
| | - Ilo E Leppik
- Experimental and Clinical Pharmacology, 308 Harvard Street SE, Minneapolis, MN 55455, United States; Department of Neurology, 420 Delaware St. SE, University of Minnesota, Minneapolis, MN 55455, United States; MINCEP Epilepsy Care, 5775 Wayzata Boulevard, Minneapolis, MN 55416, United States
| | - Page B Pennell
- Department of Neurology and Division of Women's Health at Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, United States
| | - James R White
- MINCEP Epilepsy Care, 5775 Wayzata Boulevard, Minneapolis, MN 55416, United States
| | - John O Rarick
- Experimental and Clinical Pharmacology, 308 Harvard Street SE, Minneapolis, MN 55455, United States
| | - Rory P Remmel
- Department of Medicinal Chemistry, 308 Harvard Street SE, University of Minnesota, Minneapolis 55455, MN, United States
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43
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Polepally AR, Pennell PB, Brundage RC, Stowe ZN, Newport DJ, Viguera AC, Ritchie JC, Birnbaum AK. MODEL-BASED LAMOTRIGINE CLEARANCE CHANGES DURING PREGNANCY: CLINICAL IMPLICATION. Ann Clin Transl Neurol 2014; 1:99-106. [PMID: 24883336 PMCID: PMC4038031 DOI: 10.1002/acn3.29] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Objective The objective of the study was to characterize changes in the oral clearance (CL/F) of lamotrigine (LTG) over the course of pregnancy and the postpartum period through a model-based approach incorporating clinical characteristics that may influence CL/F, in support of developing clinical management guidelines. Methods Women receiving LTG therapy who were pregnant or planning pregnancy were enrolled. Maternal blood samples were collected at each visit. A pharmacokinetic analysis was performed using a population-based, nonlinear, mixed-effects model. Results A total of 600 LTG concentrations from 60 women (64 pregnancies) were included. The baseline LTG CL/F was 2.16 L/h with a between-subject variability of 40.6%. The influence of pregnancy on CL/F was described by gestational week. Two subpopulations of women emerged based on the rate of increase in LTG CL/F during pregnancy. The gestational age-associated increase in CL/F displayed a 10-fold higher rate in 77% of the women (0.118 L/h per week) compared to 23% (0.0115 L/h per week). The between-subject variability in these slopes was 43.0%. The increased CL/F at delivery declined to baseline values with a half-life of 0.55 weeks. Interpretation The majority of women had a substantial increase in CL/F from 2.16 to 6.88 L/h by the end of pregnancy, whereas 23% of women had a minimal increase. An increase in CL/F may correspond to decreases in LTG blood concentrations necessitating the need for more frequent dosage adjustments and closer monitoring in some pregnant women with epilepsy. Postpartum doses should be tapered to preconception dose ranges within 3 weeks of delivery.
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Affiliation(s)
- Akshanth R Polepally
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Page B Pennell
- Department of Neurology and Division of Women's Health at Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Richard C Brundage
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
| | - Zachary N Stowe
- Department of Psychiatry, Pediatrics, and Obstetrics & Gynecology, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - D Jeffrey Newport
- Departments of Psychiatry and Obstetrics & Gynecology, The Ohio State University College of Medicine, Columbus, Ohio ; Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia
| | | | - James C Ritchie
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia ; Department of Pathology, Emory University School of Medicine
| | - Angela K Birnbaum
- Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
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44
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Passey C, Birnbaum AK, Brundage RC, Schladt DP, Oetting WS, Leduc RE, Israni AK, Guan W, Matas AJ, Jacobson PA. Validation of tacrolimus equation to predict troughs using genetic and clinical factors. Pharmacogenomics 2013; 13:1141-7. [PMID: 22909204 DOI: 10.2217/pgs.12.98] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM Tacrolimus is an immunosuppressant used in transplantation. This article reports the validation of the authors' recently developed genetics-based tacrolimus equation that predicts troughs. METHODS Validation was performed in an independent cohort of 795 kidney transplant recipients receiving tacrolimus. The performance of the equation to predict initial troughs was assessed by calculating the bias and precision of the equation. For all troughs in the first 6 months post-transplant, a comparison was made between the troughs predicted using the equation versus those predicted using a basic apparent clearance model with no covariates. RESULTS For initial troughs, the equation had a low bias (0.2 ng/ml) and high precision (1.8 ng/ml). For all troughs, the equation predicted troughs significantly better than the basic apparent clearance model. CONCLUSION The tacrolimus equation had good bias and precision in predicting initial troughs and performed better than a basic apparent clearance model for all the troughs.
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Affiliation(s)
- Chaitali Passey
- Department of Experimental & Clinical Pharmacology, 717 Delaware Street, University of Minnesota, Minneapolis, MN 55455, USA
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Raleigh MD, Pravetoni M, Harris AC, Birnbaum AK, Pentel PR. Selective effects of a morphine conjugate vaccine on heroin and metabolite distribution and heroin‐induced behaviors in rats. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.886.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Marco Pravetoni
- Dept of PharmacologyU of MinnesotaMinneapolisMN
- Minneapolis Medical Research FoundationMinneapolisMN
| | - Andrew C Harris
- Dept of MedicineU of MinnesotaMinneapolisMN
- Minneapolis Medical Research FoundationMinneapolisMN
| | - Angela K Birnbaum
- Dept of Experimental and Clinical PharmacologyU of MinnesotaMinneapolisMN
| | - Paul R Pentel
- Dept of PharmacologyU of MinnesotaMinneapolisMN
- Minneapolis Medical Research FoundationMinneapolisMN
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46
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Punyawudho B, Ramsay RE, Macias FM, Rowan AJ, Collins JF, Brundage RC, Birnbaum AK. Population Pharmacokinetics of Lamotrigine in Elderly Patients. J Clin Pharmacol 2013; 48:455-63. [DOI: 10.1177/0091270007313391] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Ahmed GF, Brundage RC, Marino SE, Cloyd JC, Leppik IE, Pennell PB, Ramsay RE, Birnbaum AK. Population pharmacokinetics of unbound and total drug concentrations following intravenously administered carbamazepine in elderly and younger adult patients with epilepsy. J Clin Pharmacol 2013; 53:276-84. [PMID: 23408495 DOI: 10.1002/jcph.8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 06/28/2012] [Indexed: 11/08/2022]
Abstract
The objective of the study was to investigate the pharmacokinetics (PK) of unbound and total plasma carbamazepine (CBZ) concentrations following simultaneous administration of intravenous and oral formulations. We tested the hypothesis that age-related alterations in physiology and patient characteristics influence CBZ disposition and protein binding. Patients (n = 113) on maintenance therapy received a 100 mg dose of a novel, intravenous, stable-labeled (SL) CBZ formulation as partial replacement of their morning CBZ dose. A two-compartment model described unbound and total SL-CBZ data. The stable-labeled intravenous dosing methodology enabled the estimation of the CBZ clearance (CL) and volumes of distribution. The CL of CBZ was dependent on race through the model equation unbound CL (L/hour) = 11.2 × (1.30)(Race); where Race = 1 for Caucasian, 0 for African American. Total body weight explained 57% and 70% of the interindividual variability in the central and peripheral volumes of distribution, respectively. Age, sex, smoking, plasma albumin, and alpha 1-acid glycoprotein concentrations had no effect on CL, binding or volumes of distribution. The model was evaluated via bootstrap and predictive check. Results may support race specific dosing for CBZ where an average African-American individual would receive 70% of the standard dose prescribed for the Caucasian person.
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Affiliation(s)
- Ghada F Ahmed
- Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, USA
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48
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Pakhomov SVS, Marino SE, Birnbaum AK. Quantification of Speech Disfluency as a Marker of Medication-Induced Cognitive Impairment: An Application of Computerized Speech Analysis in Neuropharmacology. COMPUT SPEECH LANG 2013; 27:116-134. [PMID: 37539014 PMCID: PMC10399282 DOI: 10.1016/j.csl.2012.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present the results of a study investigating the use of speech and language characteristics extracted from spontaneous spoken discourse to assess changes in cognitive function. Specifically, we investigated the use of automatic speech recognition technology to characterize spontaneous speech disfluency induced by topiramate, an anti-epileptic medication with language-related side-effects. We audio recorded spontaneous speech samples from 20 participants during several picture description tasks and analyzed the recordings automatically and manually to extract a range of spoken fluency measurements including speech discontinuities (e.g., filled pauses, false starts, and repetitions), silent pause duration, speaking rate and vowel lengthening. Our results indicate that some of these paralinguistic speech characteristics are a) sensitive to the effects of topiramate, b) are associated with topiramate concentrations in the blood, and c) complement standard neuropsychological tests typically used to investigate cognitive effects of medications. This work demonstrates the use of computational linguistic tools to assess cognitive effects in a more sensitive, objective and reproducible manner than is currently available with standard tests.
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Affiliation(s)
- Serguei V S Pakhomov
- Center for Clinical and Cognitive Neuropharmacology, 7-125F Weaver Densford Hall, 308 Harvard St. SE, Minneapolis, MN, 55406 USA
| | - Susan E Marino
- Center for Clinical and Cognitive Neuropharmacology, 7-125F Weaver Densford Hall, 308 Harvard St. SE, Minneapolis, MN, 55406 USA
| | - Angela K Birnbaum
- Center for Clinical and Cognitive Neuropharmacology, 7-125F Weaver Densford Hall, 308 Harvard St. SE, Minneapolis, MN, 55406 USA
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Puranik YG, Birnbaum AK, Marino SE, Ahmed G, Cloyd JC, Remmel RP, Leppik IE, Lamba JK. Association of carbamazepine major metabolism and transport pathway gene polymorphisms and pharmacokinetics in patients with epilepsy. Pharmacogenomics 2013; 14:35-45. [PMID: 23252947 PMCID: PMC3570048 DOI: 10.2217/pgs.12.180] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
AIM The aim of this study was to evaluate the association of genetic variants in the major genes involved in carbamazepine (CBZ) metabolism and transport with its pharmacokinetics in epilepsy patients. MATERIALS & METHODS Twenty-five SNPs within seven CBZ pathway genes, namely CYP3A4, CYP3A5, EPHX1, NR1I2, UGT2B7, ABCB1 and ABCC2, were analyzed for association with CBZ pharmacokinetics in 90 epilepsy patients. RESULTS The CYP3A4*1B SNP was significantly associated with CBZ clearance. Significant association of EPHX1 SNPs was observed with greater carbamazepine-10,11-trans dihydrodiol:carbamazepine 10-11 epoxide ratios. Among drug transporters, ABCB1 and ABCC2 SNPs were significantly associated with altered CBZ clearance. CONCLUSION SNPs within CBZ pathway genes contribute to interpatient variation in CBZ pharmacokinetics and might contribute to pharmacoresistant epilepsy. Although our results need further clinical validation in a larger patient cohort, they indicate that genetic variation in CBZ pathway genes could influence its pharmacokinetics, and hence would have clinical significance.
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Affiliation(s)
- Yogita Ghodke Puranik
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Angela K Birnbaum
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
- Center for Clinical & Cognitive Neuropharmacology, University of Minnesota, Minneapolis, MN, USA
| | - Susan E Marino
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
- Center for Clinical & Cognitive Neuropharmacology, University of Minnesota, Minneapolis, MN, USA
| | - Ghada Ahmed
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - James C Cloyd
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
- Center for Orphan Drug Research, University of Minnesota, Minneapolis MN, USA
| | - Rory P Remmel
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
| | - Ilo E Leppik
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
- Department of Neurology, School of Medicine, University of Minnesota, Minneapolis, MN, USA
- MINCEP Epilepsy Care, Minneapolis, MN, USA
| | - Jatinder K Lamba
- Department of Experimental & Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN, USA
- PUMA-Institute of Personalized Medicine, Minneapolis, MN, USA
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Raleigh MD, Pravetoni M, Harris AC, Birnbaum AK, Pentel PR. Selective effects of a morphine conjugate vaccine on heroin and metabolite distribution and heroin-induced behaviors in rats. J Pharmacol Exp Ther 2012; 344:397-406. [PMID: 23220743 DOI: 10.1124/jpet.112.201194] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Morphine conjugate vaccines have effectively reduced behavioral effects of heroin in rodents and primates. To better understand how these effects are mediated, heroin and metabolite distribution studies were performed in rats in the presence and absence of vaccination. In non-vaccinated rats 6-monoacetylmorphine (6-MAM) was the predominant opioid in plasma and brain as early as 1 minute after i.v. administration of heroin and for up to 14 minutes. Vaccination with morphine conjugated to keyhole limpet hemocyanin (M-KLH) elicited high titers and concentrations of antibodies with high affinity for heroin, 6-MAM, and morphine. Four minutes after heroin administration vaccinated rats showed substantial retention of all three opioids in plasma compared to controls and reduced 6-MAM and morphine, but not heroin, distribution to brain. Administration of 6-MAM rather than heroin in M-KLH vaccinated rats showed a similar drug distribution pattern. Vaccination reduced heroin-induced analgesia and blocked heroin-induced locomotor activity throughout 2 weeks of repeated testing. Higher serum opioid-specific antibody concentrations were associated with higher plasma opioid concentrations, lower brain 6-MAM and morphine concentrations, and lower heroin-induced locomotor activity. Serum antibody concentrations over 0.2 mg/ml were associated with substantial effects on these measures. These data support a critical role for 6-MAM in mediating the early effects of i.v. heroin and suggest that reducing 6-MAM concentration in brain is essential to the efficacy of morphine conjugate vaccines.
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Affiliation(s)
- M D Raleigh
- Department of Pharmacology, University of Minnesota, Minneapolis, Minnesota, USA.
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