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Ziesenitz VC, Welzel T, van Dyk M, Saur P, Gorenflo M, van den Anker JN. Efficacy and Safety of NSAIDs in Infants: A Comprehensive Review of the Literature of the Past 20 Years. Paediatr Drugs 2022; 24:603-655. [PMID: 36053397 PMCID: PMC9592650 DOI: 10.1007/s40272-022-00514-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/25/2022] [Indexed: 11/29/2022]
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) are commonly used in infants, children, and adolescents worldwide; however, despite sufficient evidence of the beneficial effects of NSAIDs in children and adolescents, there is a lack of comprehensive data in infants. The present review summarizes the current knowledge on the safety and efficacy of various NSAIDs used in infants for which data are available, and includes ibuprofen, dexibuprofen, ketoprofen, flurbiprofen, naproxen, diclofenac, ketorolac, indomethacin, niflumic acid, meloxicam, celecoxib, parecoxib, rofecoxib, acetylsalicylic acid, and nimesulide. The efficacy of NSAIDs has been documented for a variety of conditions, such as fever and pain. NSAIDs are also the main pillars of anti-inflammatory treatment, such as in pediatric inflammatory rheumatic diseases. Limited data are available on the safety of most NSAIDs in infants. Adverse drug reactions may be renal, gastrointestinal, hematological, or immunologic. Since NSAIDs are among the most frequently used drugs in the pediatric population, safety and efficacy studies can be performed as part of normal clinical routine, even in young infants. Available data sources, such as (electronic) medical records, should be used for safety and efficacy analyses. On a larger scale, existing data sources, e.g. adverse drug reaction programs/networks, spontaneous national reporting systems, and electronic medical records should be assessed with child-specific methods in order to detect safety signals pertinent to certain pediatric age groups or disease entities. To improve the safety of NSAIDs in infants, treatment needs to be initiated with the lowest age-appropriate or weight-based dose. Duration of treatment and amount of drug used should be regularly evaluated and maximum dose limits and other recommendations by the manufacturer or expert committees should be followed. Treatment for non-chronic conditions such as fever and acute (postoperative) pain should be kept as short as possible. Patients with chronic conditions should be regularly monitored for possible adverse effects of NSAIDs.
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Affiliation(s)
- Victoria C Ziesenitz
- Pediatric Cardiology and Congenital Heart Diseases, Centre for Child and Adolescent Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany.
- Pediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Basel, Switzerland.
| | - Tatjana Welzel
- Pediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Basel, Switzerland
- Pediatric Rheumatology and Autoinflammatory Reference Center, University Hospital Tuebingen, Tuebingen, Germany
| | - Madelé van Dyk
- Flinders Centre for Innovation in Cancer, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Patrick Saur
- Pediatric Cardiology and Congenital Heart Diseases, Centre for Child and Adolescent Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany
| | - Matthias Gorenflo
- Pediatric Cardiology and Congenital Heart Diseases, Centre for Child and Adolescent Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany
| | - Johannes N van den Anker
- Pediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Basel, Switzerland
- Division of Clinical Pharmacology, Children's National Hospital, Washington DC, USA
- Intensive Care and Department of Pediatric Surgery, Sophia Children's Hospital, Rotterdam, The Netherlands
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2
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Kane Z, Gastine S, Obiero C, Williams P, Murunga S, Thitiri J, Ellis S, Correia E, Nyaoke B, Kipper K, van den Anker J, Sharland M, Berkley JA, Standing JF. IV and oral fosfomycin pharmacokinetics in neonates with suspected clinical sepsis. J Antimicrob Chemother 2021; 76:1855-1864. [PMID: 33855449 PMCID: PMC8212774 DOI: 10.1093/jac/dkab083] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 02/20/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Fosfomycin has the potential to be re-purposed as part of a combination therapy to treat neonatal sepsis where resistance to current standard of care (SOC) is common. Limited data exist on neonatal fosfomycin pharmacokinetics and estimates of bioavailability and CSF/plasma ratio in this vulnerable population are lacking. OBJECTIVES To generate data informing the appropriate dosing of IV and oral fosfomycin in neonates using a population pharmacokinetic analysis of plasma and CSF data. METHODS The NeoFosfo study (NCT03453177) was a randomized trial that examined the safety and pharmacokinetics of fosfomycin comparing SOC versus SOC plus fosfomycin. Sixty-one neonates received fosfomycin (100 mg/kg IV q12h for 48 h) and then they converted to oral therapy at the same dose. Two plasma pharmacokinetic samples were taken following the first IV and oral doses, sample times were randomized to cover the whole pharmacokinetic profile and opportunistic CSF pharmacokinetic samples were collected. A population pharmacokinetic model was developed in NONMEM and simulations were performed. RESULTS In total, 238 plasma and 15 CSF concentrations were collected. A two-compartment disposition model, with an additional CSF compartment and first-order absorption, best described the data. Bioavailability was estimated as 0.48 (95% CI = 0.347-0.775) and the CSF/plasma ratio as 0.32 (95% CI = 0.272-0.409). Allometric weight and postmenstrual age (PMA) scaling was applied; additional covariates included postnatal age (PNA) on clearance and CSF protein on CSF/plasma ratio. CONCLUSIONS Through this analysis a population pharmacokinetic model has been developed that can be used alongside currently available pharmacodynamic targets to select a neonatal fosfomycin dose based on an infant's PMA, PNA and weight.
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Affiliation(s)
- Zoe Kane
- Infection, Immunity and Inflammation, Great Ormond Street Institute of Child Health, University College London, London, UK.,Quotient Sciences, Mere Way, Ruddington, Nottingham, UK
| | - Silke Gastine
- Infection, Immunity and Inflammation, Great Ormond Street Institute of Child Health, University College London, London, UK
| | | | - Phoebe Williams
- KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya.,Centre for Tropical Medicine & Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | | | | | - Sally Ellis
- GARDP-Global Antibiotic Research & Development Partnership, Genève, Switzerland
| | - Erika Correia
- GARDP-Global Antibiotic Research & Development Partnership, Genève, Switzerland
| | - Borna Nyaoke
- DNDi-Drugs for Neglected Diseases initiative, Nairobi, Kenya
| | - Karin Kipper
- Institute of Chemistry, University of Tartu, Tartu, Estonia
| | - John van den Anker
- Department of Paediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Basel, Switzerland.,Division of Clinical Pharmacology, Children's National Hospital, Washington, DC, USA
| | - Mike Sharland
- Paediatric Infectious Diseases Research Group, Institute for Infection and Immunity, St George's, University of London, London, UK
| | - James A Berkley
- KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya.,Centre for Tropical Medicine & Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK.,The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
| | - Joseph F Standing
- Infection, Immunity and Inflammation, Great Ormond Street Institute of Child Health, University College London, London, UK.,Pharmacy Department, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
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Verscheijden LFM, Koenderink JB, de Wildt SN, Russel FGM. Development of a physiologically-based pharmacokinetic pediatric brain model for prediction of cerebrospinal fluid drug concentrations and the influence of meningitis. PLoS Comput Biol 2019; 15:e1007117. [PMID: 31194730 PMCID: PMC6592555 DOI: 10.1371/journal.pcbi.1007117] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/25/2019] [Accepted: 05/21/2019] [Indexed: 01/28/2023] Open
Abstract
Different pediatric physiologically-based pharmacokinetic (PBPK) models have been described incorporating developmental changes that influence plasma drug concentrations. Drug disposition into cerebrospinal fluid (CSF) is also subject to age-related variation and can be further influenced by brain diseases affecting blood-brain barrier integrity, like meningitis. Here, we developed a generic pediatric brain PBPK model to predict CSF concentrations of drugs that undergo passive transfer, including age-appropriate parameters. The model was validated for the analgesics paracetamol, ibuprofen, flurbiprofen and naproxen, and for a pediatric meningitis population by empirical optimization of the blood-brain barrier penetration of the antibiotic meropenem. Plasma and CSF drug concentrations derived from the literature were used to perform visual predictive checks and to calculate ratios between simulated and observed area under the concentration curves (AUCs) in order to evaluate model performance. Model-simulated concentrations were comparable to observed data over a broad age range (3 months–15 years postnatal age) for all drugs investigated. The ratios between observed and simulated AUCs (AUCo/AUCp) were within 2-fold difference both in plasma (range 0.92–1.09) and in CSF (range 0.64–1.23) indicating acceptable model performance. The model was also able to describe disease-mediated changes in neonates and young children (<3m postnatal age) related to meningitis and sepsis (range AUCo/AUCp plasma: 1.64–1.66, range AUCo/AUCp CSF: 1.43–1.73). Our model provides a new computational tool to predict CSF drug concentrations in children with and without meningitis and can be used as a template model for other compounds that passively enter the CNS. Developmental processes in children affect pharmacokinetics and should ideally be taken into account when establishing drug dosing regimens. One way to incorporate developmental differences is by making use of physiologically-based pharmacokinetic (PBPK) models in which kinetic equations are used to describe drug disposition processes and developmental biology. With these equations the absorption of drugs into the model, the flow of drugs between different compartments (representing major organs/tissues), and excretion from the model are predicted. PBPK models can also be used to describe drug concentrations in different target tissues, which often correlate better with the clinical effects. Here, we developed a generic pediatric PBPK model of drug disposition in the cerebrospinal fluid (CSF), that was able to describe clinically measured drug concentrations of several drugs in neonates and children. The model could be useful in predicting CSF concentrations of other drugs in pediatric populations where clinical data is often sparse or absent and by this means guide first-in-child dose recommendations.
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Affiliation(s)
- Laurens F. M. Verscheijden
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Jan B. Koenderink
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Saskia N. de Wildt
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Frans G. M. Russel
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
- * E-mail:
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Lovell DJ, Dare JA, Francis-Sedlak M, Ball J, LaMoreaux BD, Von Scheven E, Reinhardt A, Jerath R, Alpan O, Gupta R, Goldsmith D, Zeft A, Naddaf H, Gottlieb B, Jung L, Holt RJ. A 6-month, multicenter, open-label study of fixed dose naproxen/esomeprazole in adolescent patients with juvenile idiopathic arthritis. Pediatr Rheumatol Online J 2018; 16:41. [PMID: 29941047 PMCID: PMC6019234 DOI: 10.1186/s12969-018-0260-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 06/14/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Juvenile idiopathic arthritis (JIA) is an inflammatory arthritis of unknown etiology, which lasts for greater than 6 weeks with onset before 16 years of age. JIA is the most common chronic rheumatic disease in children. NSAIDs have been the mainstay of initial management with naproxen (NAP) being commonly used, but they may cause serious side effects such as gastric ulcers which can be reduced by concomitant administration of proton pump inhibitors, such as esomeprazole (ESO). METHODS Primary objective was to evaluate the safety and tolerability of 3 fixed doses of NAP/ESO in JIA patients aged 12 to 16 years. Forty-six children and adolescents with JIA by International League of Associations for Rheumatology criteria, mean age of 13.6 years, from 18 US sites were prospectively enrolled over 2 years and followed for up to 6 months. Doses of the NAP/ESO fixed combination were based on baseline weight. The exploratory efficacy outcome was assessed with the ACR Pediatric-30, - 50, - 70, - 90 Response and the Childhood Health Assessment Questionnaire (CHAQ) discomfort and functional scores at months 1, 3, and 6 as change from baseline. Occurrence and causality were assessed for treatment emergent AEs (TEAEs) and discontinuations were monitored monthly. RESULTS Forty-six patients received at least 1 dose of naproxen/esomeprazole and 36 completed the trial. Thirty-seven (80.4%) had at least 1 treatment emergent adverse event (TEAE) and, with the exception of 2 events in one patient, all of the TEAEs were mild or moderate. Frequent TEAEs (≥5% of patients) were upper respiratory tract and gastrointestinal related. Eleven (23.9%) had at least 1 TEAE considered to be related to study drug. Four patients (8.7%) discontinued due to a TEAE with one of these being the only serious AE reported, acute hepatitis. Mean number of active joints at baseline was 3.1. Improvement in JIA signs and symptoms occurred at most assessments and by month 6, the percentage of patients with an ACR Pediatric-30, - 50, - 70, and - 90 Response was 47.1, 38.2, 32.4, and 17.6%, respectively. The percent of patients achieving ACR Pediatric response increased over time. CHAQ discomfort improved at each assessment and functional scores improved at all assessments for 'Arising, Walking, and Activities' with several improved for 'Dressing and Grooming, Eating, Hygiene, and Grip'. There was no indication of a dose-related efficacy effect. CONCLUSION NAP/ESO was well tolerated in JIA patients aged 12 to 16 years with high levels of response to ACR criteria. No new safety signals were identified for the well-characterized components of this fixed dosed JIA treatment, which was developed to reduce the risk of gastric ulcers. TRIAL REGISTRATION Clinicaltrials.gov, NCT01544114 . Registered February 21, 2012.
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Affiliation(s)
- Daniel J. Lovell
- 0000 0000 9025 8099grid.239573.9Cincinnati Children’s Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH 45229 USA ,0000 0001 2179 9593grid.24827.3bUniversity of Cincinnati School of Medicine, 3230 Eden Ave, Cincinnati, OH 45267 USA
| | - Jason A. Dare
- 0000 0001 2157 2081grid.239305.eArkansas Children’s Hospital, 1 Children’s Way, Slot# 512-2, Little Rock, AR 72202 USA
| | - Megan Francis-Sedlak
- 0000 0004 4903 3495grid.476366.6Horizon Pharma USA, Inc, 150 South Saunders Road, Lake Forest, IL 60045 USA
| | - Julie Ball
- 0000 0004 4903 3495grid.476366.6Horizon Pharma USA, Inc, 150 South Saunders Road, Lake Forest, IL 60045 USA
| | - Brian D. LaMoreaux
- 0000 0004 4903 3495grid.476366.6Horizon Pharma USA, Inc, 150 South Saunders Road, Lake Forest, IL 60045 USA
| | - Emily Von Scheven
- 0000 0001 2297 6811grid.266102.1University of California San Francisco Pediatric Rheumatology, 550 16th Street, 5th Fl, San Francisco, CA 94158 USA
| | - Adam Reinhardt
- 0000 0001 0775 5412grid.266815.eUniversity of Nebraska Medical Center/Children’s Hospital and Medical Center, 8200 Dodge St, Omaha, NE 68114 USA
| | - Rita Jerath
- 0000 0001 2284 9329grid.410427.4Augusta University Medical Center, 1120 15th Street, Augusta, GA 30912-5536 USA
| | - Oral Alpan
- grid.477618.bO & O Alpan, LLC, 11212 Waples Mill Rd Ste. 100, Fairfax, VA 22030 USA
| | - Ramesh Gupta
- Rheumatology and Immunology Private Practice, 6005 Park Ave, Suite 409, Memphis, TN 38119 USA
| | - Donald Goldsmith
- 0000 0004 0383 801Xgrid.416364.2St. Christopher’s Hospital for Children, 160 E Erie Ave, Philadelphia, PA 19134 USA
| | - Andrew Zeft
- 0000 0001 0675 4725grid.239578.2The Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195 USA
| | - Henry Naddaf
- Toledo Clinic Inc, 4235 Secor Road, Toledo, OH 43623 USA
| | - Beth Gottlieb
- grid.415338.8Cohen Children’s Medical Center of New York, 269-01 76th Avenue, New Hyde Park, NY 11040 USA
| | - Lawrence Jung
- grid.239560.bChildren’s National Medical Center, 111 Michigan Avenue, NW, Washington, DC, 20010 USA
| | - Robert J. Holt
- 0000 0004 4903 3495grid.476366.6Horizon Pharma USA, Inc, 150 South Saunders Road, Lake Forest, IL 60045 USA ,0000 0001 2175 0319grid.185648.6Department of Pharmacy Practice, College of Pharmacy, University of Illinois-Chicago, 1721 North Woods Way, Vernon Hills, IL 60061 USA
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Piirainen A, Kokki M, Hautajärvi H, Lehtonen M, Miettinen H, Pulkki K, Ranta VP, Kokki H. The Cerebrospinal Fluid Distribution of Postoperatively Administred Dexketoprofen and Etoricoxib and Their Effect on Pain and Inflammatory Markers in Patients Undergoing Hip Arthroplasty. Clin Drug Investig 2016; 36:545-55. [PMID: 27086319 DOI: 10.1007/s40261-016-0400-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND OBJECTIVE Based on earlier literature, etoricoxib may have a delayed analgesic effect in postoperative setting when analgesic efficacy of nonselective nonsteroidal anti-inflammatory drug dexketoprofen is rapid. This may be caused by slow penetration of etoricoxib into the central nervous system (CNS). Therefore we decided to determine the plasma and cerebrospinal fluid (CSF) pharmacokinetics and pharmacodynamics of dexketoprofen and etoricoxib in patients with hip arthroplasty. METHODS A total of 24 patients, scheduled for an elective primary hip arthroplasty were enrolled. After surgery, 12 subjects were randomized to received a single intravenous dose of dexketoprofen, and 12 subjects were given oral etoricoxib. Paired blood and CSF samples were taken up to 24 h for measurement of drug concentrations, interleukin (IL)-6, IL-1ra and blood for interleukin 10. RESULTS In CSF the highest measured concentration (C max) of dexketoprofen was 4.0 (median) ng/mL (minimum-maximum 1.9-13.9) and time to the highest concentration (t max) 3 h (2-5), and for etoricoxib C max 73 ng/mL (36-127) and t max 5 h (1-24), respectively. Opioid consumption during the first 24 postoperative hours was similar in the two groups. Dexketoprofen and etoricoxib had a similar effect on the postoperative inflammatory response. No significant differences considering pain relief or adverse events were found between the two groups. CONCLUSION Dexketoprofen and etoricoxib entered the CNS readily, already at 30 min after administration dexketoprofen was detected in the CSF in most subjects and etoricoxib after 60 min. A single dose of dexketoprofen and etoricoxib provided a similar anti-inflammatory and analgesic response after major orthopaedic surgery.
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Affiliation(s)
- Annika Piirainen
- Department of Anaesthesia and Operative Services, Kuopio University Hospital, PO Box 100, 70029, Kuopio, Finland.,Department of Anaesthesiology and Intensive Care, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Merja Kokki
- Department of Anaesthesia and Operative Services, Kuopio University Hospital, PO Box 100, 70029, Kuopio, Finland. .,Department of Anaesthesiology and Intensive Care, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.
| | | | - Marko Lehtonen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Hannu Miettinen
- Department of Orthopaedic Surgery, Kuopio University Hospital, Kuopio, Finland
| | - Kari Pulkki
- Department of Clinical Chemistry University of Eastern Finland, Eastern Finland Laboratory Centre Joint Authority Enterprise (ISLAB), Kuopio, Finland
| | - Veli-Pekka Ranta
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Hannu Kokki
- Department of Anaesthesia and Operative Services, Kuopio University Hospital, PO Box 100, 70029, Kuopio, Finland.,Department of Anaesthesiology and Intensive Care, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
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Population Pharmacokinetics and Dosing Regimen Optimization of Meropenem in Cerebrospinal Fluid and Plasma in Patients with Meningitis after Neurosurgery. Antimicrob Agents Chemother 2016; 60:6619-6625. [PMID: 27572392 PMCID: PMC5075067 DOI: 10.1128/aac.00997-16] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/13/2016] [Indexed: 11/22/2022] Open
Abstract
Meropenem is used to manage postneurosurgical meningitis, but its population pharmacokinetics (PPK) in plasma and cerebrospinal fluid (CSF) in this patient group are not well-known. Our aims were to (i) characterize meropenem PPK in plasma and CSF and (ii) recommend favorable dosing regimens in postneurosurgical meningitis patients. Eighty-two patients were enrolled to receive meropenem infusions of 2 g every 8 h (q8h), 1 g q8h, or 1 g q6h for at least 3 days. Serial blood and CSF samples were collected, and concentrations were determined and analyzed via population modeling. Probabilities of target attainment (PTA) were predicted via Monte Carlo simulations, using the target of unbound meropenem concentrations above the MICs for at least 40% of dosing intervals in plasma and at least of 50% or 100% of dosing intervals in CSF. A two-compartment model plus another CSF compartment best described the data. The central, intercentral/peripheral, and intercentral/CSF compartment clearances were 22.2 liters/h, 1.79 liters/h, and 0.01 liter/h, respectively. Distribution volumes of the central and peripheral compartments were 17.9 liters and 3.84 liters, respectively. The CSF compartment volume was fixed at 0.13 liter, with its clearance calculated by the observed drainage amount. The multiplier for the transfer from the central to the CSF compartment was 0.172. Simulation results show that the PTAs increase as infusion is prolonged and as the daily CSF drainage volume decreases. A 4-hour infusion of 2 g q8h with CSF drainage of less than 150 ml/day, which provides a PTA of >90% for MICs of ≤8 mg/liter in blood and of ≤0.5 mg/liter or 0.25 mg/liter in CSF, is recommended. (This study has been registered at ClinicalTrials.gov under identifier NCT02506686.)
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VÄLITALO P, RANTA VP, HOOKER AC, KOKKI M, KOKKI H. Population pharmacometrics in support of analgesics studies. Acta Anaesthesiol Scand 2014; 58:143-56. [PMID: 24383522 DOI: 10.1111/aas.12253] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2013] [Indexed: 12/20/2022]
Abstract
Population pharmacometric modeling is used to explain both population trends as well as the sources and magnitude of variability in pharmacokinetic and pharmacodynamics data; the later, in part, by taking into account patient characteristics such as weight, age, renal function and genetics. The approach is best known for its ability to analyze sparse data, i.e. when only a few measurements have been collected from each subject, but other benefits include its flexibility and the potential to construct more detailed models than those used in the traditional individual curve fitting approach. This review presents the basic concepts of population pharmacokinetic and pharmacodynamic modeling and includes several analgesic drug examples. In addition, the use of these models to design and optimize future studies is discussed. In this context, finding the best design factors, such as the sampling times or the dose, for future studies within pre-defined criteria using a previously constructed population pharmacokinetic model can help researchers acquire clinically meaningful data without wasting resources and unnecessarily exposing vulnerable patient groups to study drugs and additional blood sampling.
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Affiliation(s)
- P. VÄLITALO
- School of Pharmacy; University of Eastern Finland; Kuopio Finland
| | - V.-P. RANTA
- School of Pharmacy; University of Eastern Finland; Kuopio Finland
| | - A. C. HOOKER
- Uppsala University; Department of Pharmaceutical Biosciences; Uppsala Sweden
| | - M. KOKKI
- School of Medicine; University of Eastern Finland; Kuopio Finland
- Kuopio University Hospital; Department of Anesthesia and Operative Services; Kuopio Finland
| | - H. KOKKI
- School of Medicine; University of Eastern Finland; Kuopio Finland
- Kuopio University Hospital; Department of Anesthesia and Operative Services; Kuopio Finland
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