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Leber B, Liebchen U, Rohrhofer L, Weber J, Klaus T, Scheier J, Sucher R, Stiegler P. Pharmacokinetics of immunosuppressive agents during hemoperfusion in a sheep model. Front Med (Lausanne) 2023; 10:1258661. [PMID: 37928476 PMCID: PMC10623319 DOI: 10.3389/fmed.2023.1258661] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/02/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction Hemoadsorption shows promising signals in organ preservation and post lung transplantation. However, its potential impact on the pharmacokinetics of immunosuppressant drugs (ID) is still unknown. Methods In this interventional study, CytoSorb® hemoperfusion was tested in healthy sheep (n = 5) against a sham extracorporeal circuit (n = 3). Seven different ID (tacrolimus (TAC), cyclosporin A (CYA), mycophenolate mofetil (MMF), everolimus (EVER), basiliximab (BAS), methylprednisolone (MP) and prednisolone (PRED)) were administered in clinically relevant doses and combinations. Their levels were measured repeatedly in blood samples from the extracorporeal circulation over 6 h following administration. Population pharmacokinetic modeling analysis (NONMEM® 7.5) was performed. Results Negligible clearance was observed for PRED and BAS. For all other substances, a saturable adsorption sub-model with linear decrease of the adsorption effect over the adsorbed amount best described the measured concentrations. The maximum absolute adsorbed amounts (95% CI) for TAC, CYA, MMF, EVER, and MP were 0.040 (0.028-0.053), 1.15 (0.39-1.91), 4.17 (2.00-6.35), 0.0163 (0.007-0.026), and 53.4 mg (20.9-85.9), respectively, indicating an adsorption of less than 5% of the daily administered dosages for all investigated substances. Discussion In this large animal model, CytoSorb® hemoperfusion appears to have a limited effect on the clearance of tested ID.
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Affiliation(s)
- Bettina Leber
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Uwe Liebchen
- Department of Anesthesiology, LMU Hospital, Munich, Germany
| | - Lisa Rohrhofer
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Jennifer Weber
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | | | | | - Robert Sucher
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Philipp Stiegler
- General, Visceral and Transplant Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
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Bloom J, Collins ML, Belovsky MP, Feduska E, Schofield P, Leong R, Augoustides JG, Lembrikov I, Kogan A, Frogel J, Rajkumar KP, Hicks MH, Fernando RJ. Perfusion-Dependent Focal Neurologic Deficits in a Critically Ill Heart Transplant Recipient: A Case of Tacrolimus-Associated Reversible Cerebral Vasospasm Syndrome? J Cardiothorac Vasc Anesth 2023:S1053-0770(23)00235-5. [PMID: 37120321 DOI: 10.1053/j.jvca.2023.03.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 03/30/2023] [Indexed: 05/01/2023]
Abstract
TACROLIMUS, a mainstay of immunosuppression after orthotopic heart transplantation (OHT), is associated with a broad range of side effects. Vasoconstriction caused by tacrolimus has been proposed as a mechanism underlying common side effects such as hypertension and renal injury. Neurologic side effects attributed to tacrolimus include headaches, posterior reversible encephalopathy syndrome (PRES), or reversible cerebral vasospasm syndrome (RCVS). Six case reports have been published describing RCVS in the setting of tacrolimus administration after OHT. The authors report a case of perfusion-dependent focal neurologic deficits attributed to tacrolimus-induced RCVS in an OHT recipient.
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Affiliation(s)
- Jamie Bloom
- Department of Anesthesiology, Thomas Jefferson University Hospital, Philadelphia, PA
| | | | - Mia P Belovsky
- Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA
| | - Eric Feduska
- Department of Anesthesiology, Thomas Jefferson University Hospital, Philadelphia, PA
| | | | - Ron Leong
- Department of Anesthesiology, Thomas Jefferson University Hospital, Philadelphia, PA
| | - John G Augoustides
- Department of Anesthesiology and Critical Care, Hospital of the University of Pennsylvania, Philadelphia, PA
| | - Ilya Lembrikov
- Department of Anesthesiology, Sheba Medical Center-Tel HaShomer, Ramat Gan, Israel
| | - Alexander Kogan
- Department of Cardiac Surgery, Sheba Medical Center-Tel HaShomer, Ramat Gan, Israel
| | - Jonathan Frogel
- Department of Anesthesiology, Sheba Medical Center-Tel HaShomer, Ramat Gan, Israel
| | - Karuna Puttur Rajkumar
- Department of Anesthesiology, Cardiothoracic and Critical Care Sections, Wake Forest University School of Medicine, Winston Salem, NC
| | - Megan H Hicks
- Department of Anesthesiology, Cardiothoracic and Critical Care Sections, Wake Forest University School of Medicine, Winston Salem, NC
| | - Rohesh J Fernando
- Department of Anesthesiology, Cardiothoracic Section, Wake Forest University School of Medicine, Medical Center Boulevard, Winston Salem, NC.
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Clouser AA, Merchan CD, Bashqoy F, Tracy JL, Papadopoulos J, Saad A. Evaluation of Parenteral Potassium Supplementation in Pediatric Patients. J Pediatr Pharmacol Ther 2023; 28:48-54. [PMID: 36777979 PMCID: PMC9901324 DOI: 10.5863/1551-6776-28.1.48] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 03/09/2022] [Indexed: 02/05/2023]
Abstract
OBJECTIVE The primary objective was to evaluate the effect of parenteral potassium chloride (KCl) supplementation on potassium (K+) concentrations in a non-cardiac pediatric population. Secondary outcomes were to identify variables that may influence response to KCl supplementation (i.e., change in K+ concentration after KCl administration) and assess the incidence of hyperkalemia. METHODS This single-center, retrospective study evaluated infants and children who received parenteral KCl supplementation of 0.5 or 1 mEq/kg between January 2017 and December 2019. RESULTS The study included 102 patients with a median age of 1 year (IQR, 0.4-3.9) and weight of 9.1 kg (IQR, 4.9-14.2) who received 288 parenteral KCl administrations. One hundred seventy-three administrations were in the 1 mEq/kg group, and 115 administrations were in the 0.5 mEq/kg group. The median changes in K+ were 0.8 and 0.5 mEq/L in the 1 mEq/kg and 0.5 mEq/kg groups, respectively. Patients who had a repeat K+ concentration within 4 hours of the end of a 1 to 2-hour infusion had a higher median change in K+ compared with those who had a concentration drawn after this time frame (0.8 vs 0.6 mEq/L; p < 0.01). CONCLUSIONS There is a paucity of data on the correlation between parenteral KCl supplementation and change in K+ concentrations in pediatric patients. Our study demonstrated an association between KCl supplementation doses of 1 and 0.5 mEq/kg and changes in K+ of 0.8 and 0.5 mEq/L, respectively, in non-cardiac pediatric patients, with low observed incidence of hyperkalemia.
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Affiliation(s)
- Amanda A. Clouser
- Department of Pharmacy (AAC, CDM, JP), NYU Langone Health, New York, NY
| | | | - Ferras Bashqoy
- Department of Pharmacy (FB, JLT, AS), Hassenfeld Children's Hospital at NYU Langone Health, New York, NY
| | - Joanna L. Tracy
- Department of Pharmacy (FB, JLT, AS), Hassenfeld Children's Hospital at NYU Langone Health, New York, NY
| | - John Papadopoulos
- Department of Pharmacy (AAC, CDM, JP), NYU Langone Health, New York, NY
| | - Anasemon Saad
- Department of Pharmacy (FB, JLT, AS), Hassenfeld Children's Hospital at NYU Langone Health, New York, NY
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Maximos S, Vaillancourt-Jean É, Mouksassi S, De Cassai A, Ayoub S, Ruel M, Desroches J, Hétu PO, Moore A, Williams S. Peak plasma concentration of total and free bupivacaine after erector spinae plane and pectointercostal fascial plane blocks. Can J Anaesth 2022; 69:1151-1159. [PMID: 35513684 DOI: 10.1007/s12630-022-02260-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 12/13/2021] [Accepted: 02/04/2022] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Erector spinae plane blocks (ESPB) and pectointercostal fascial (PIFB) plane blocks are novel interfascial blocks for which local anesthetic (LA) doses and concentrations necessary to achieve safe and effective analgesia are unknown. The goal of this prospective observational study was to provide the timing (Tmax) and concentration (Cmax) of maximum total and free plasma bupivacaine after ESPB in breast surgery and after PIFB in cardiac surgery patients. METHODS Erector spinae plane blocks or PIFBs (18 patients per block; total, 36 patients) were performed with 2 mg⋅kg-1 of bupivacaine with epinephrine 5 μg⋅mL-1. Our principal outcomes were the mean or median Cmax of total and free plasma bupivacaine measured 10, 20, 30, 45, 60, 90, 180, and 240 min after LA injection using liquid chromatography with tandem mass spectrometry. RESULTS For ESPB, the mean (standard deviation [SD]) total bupivacaine Cmax was 0.37 (0.12) μg⋅mL-1 (range, 0.19 to 0.64), and the median [interquartile range (IQR)] Tmax was 30 [50] min (range, 10-180). For ESPB, the mean (SD) free bupivacaine Cmax was 0.015 (0.017) μg⋅mL-1 (range, 0.003-0.067), and the median [IQR] Tmax was 30 [20] min (range, 10-120). After PIFB, mean plasma concentrations plateaued at 60-240 min. For PIFB, the mean (SD) total bupivacaine Cmax was 0.32 (0.21) μg⋅mL-1 (range, 0.14-0.95), with a median [IQR] Tmax of 120 [150] min (range, 30-240). For PIFB, the mean (SD) free bupivacaine Cmax was 0.019 (0.010) μg⋅mL-1 (range, 0.005-0.048), and the median [IQR] Tmax was 180 [120] min (range, 30-240). For both ESPB and PIFB, we observed no correlations between pharmacokinetic and demographic parameters. CONCLUSION Total and free bupivacaine Cmax observed after ESPB and PIFB with 2 mg⋅kg-1 of bupivacaine with epinephrine 5 μg⋅mL-1 were five to twenty times lower than levels considered toxic in the literature.
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Affiliation(s)
- Sarah Maximos
- Département d'Anesthésiologie, Centre hospitalier de l'Université de Montréal, Montreal, QC, H2L 4M1, Canada
| | - Éric Vaillancourt-Jean
- Département de Biochimie, Centre hospitalier de l'Université de Montréal, Montreal, QC, Canada
| | - Samer Mouksassi
- Faculté de Pharmacie, Université de Montréal, Montreal, QC, Canada
| | - Alessandro De Cassai
- UOC Anesthesia and Intensiva Care Unit, Padua University Hospital, Padua, Veneto, Italy
| | - Sophie Ayoub
- Département d'Anesthésiologie, Centre hospitalier de l'Université de Montréal, Montreal, QC, H2L 4M1, Canada
| | - Monique Ruel
- Département d'Anesthésiologie, Centre hospitalier de l'Université de Montréal, Montreal, QC, H2L 4M1, Canada
| | - Julie Desroches
- Département d'Anesthésiologie, Centre hospitalier de l'Université de Montréal, Montreal, QC, H2L 4M1, Canada
| | - Pierre-Oliver Hétu
- Département de Biochimie, Centre hospitalier de l'Université de Montréal, Montreal, QC, Canada
| | - Alex Moore
- Département d'Anesthésiologie, Centre hospitalier de l'Université de Montréal, Montreal, QC, H2L 4M1, Canada.
| | - Stephan Williams
- Département d'Anesthésiologie, Centre hospitalier de l'Université de Montréal, Montreal, QC, H2L 4M1, Canada
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Sikma MA, Hunault CC, Van Maarseveen EM, Huitema ADR, Van de Graaf EA, Kirkels JH, Verhaar MC, Grutters JC, Kesecioglu J, De Lange DW. High Variability of Whole-Blood Tacrolimus Pharmacokinetics Early After Thoracic Organ Transplantation. Eur J Drug Metab Pharmacokinet 2020; 45:123-134. [PMID: 31745812 PMCID: PMC6994432 DOI: 10.1007/s13318-019-00591-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Background and Objective Oral tacrolimus is initiated perioperatively in heart and lung transplantation patients. There have been few studies on oral tacrolimus pharmacokinetics early post-transplantation, even though tacrolimus-related toxicity may occur early, potentially leading to morbidity and mortality. Therefore, we aimed to study the pharmacokinetics of oral tacrolimus in thoracic organ recipients during the first days after transplantation. Methods We conducted a pharmacokinetic study in 30 thoracic organ transplants at intensive care at the University Medical Center Utrecht in the first week post-transplantation. Twelve-hour whole-blood tacrolimus profiles were examined using high-performance liquid chromatography tandem mass spectrometry (HPLC–MS/MS) and analysed via population pharmacokinetic modelling. Results The concentration–time profiles showed high variability. Concentrations at 12 h were outside the target range in 69% of the cases. A two-compartment model with mixed first-order and zero-order absorption adequately described tacrolimus concentrations. The typical value of the apparent clearance was 19.6 L/h (95% CI 16.2–22.9), and the apparent distribution volumes of central and peripheral compartments, V1 and V2, were 231 L (95% CI 199–267) and 521 L (95% CI 441–634), respectively. Inter-occasion (dose-to-dose) variability far exceeded the interindividual variability (IIV), with an estimated variability in relative bioavailability of 55% (95% CI 48.5–64.4). Conclusions The high variability of tacrolimus pharmacokinetics early after thoracic organ transplantation is largely due to excessive variability in bioavailability, making individualised dosing based on measured concentrations futile. To bypass this bioavailability issue, we suggest administering tacrolimus intravenously and aiming below the upper therapeutic range early post-transplantation. Clinical Trial Registraion: NTR 3912/EudraCT 2012-001909-24. Electronic supplementary material The online version of this article (10.1007/s13318-019-00591-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Maaike A Sikma
- Department of Intensive Care and Dutch Poisons Information Center, University Medical Center Utrecht, Utrecht University, F06.149, P.O. Box 85500, 3508 GA, Utrecht, The Netherlands.
| | - Claudine C Hunault
- Dutch Poisons Information Center, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Erik M Van Maarseveen
- Department of Clinical Pharmacy, Princess Máxima Center, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands.,Department of Clinical Pharmacy, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Alwin D R Huitema
- Department of Clinical Pharmacy, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands.,Department of Pharmacy and Pharmacology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Ed A Van de Graaf
- Department of Lung Transplantation, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Johannes H Kirkels
- Department of Cardiology, Heart Transplantation, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Marianne C Verhaar
- Department of Nephrology and Hypertension, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Jan C Grutters
- Department of Lung Transplantation, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands.,Department of Pulmonology, St. Antonius Hospital, Nieuwegein, Utrecht, The Netherlands
| | - Jozef Kesecioglu
- Department of Intensive Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
| | - Dylan W De Lange
- Dutch Poisons Information Center and Department of Intensive Care, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands
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Moffett BS, Resendiz K, Morris J, Akcan-Arikan A, Checchia PA. Population Pharmacokinetics of Vancomycin in the Pediatric Cardiac Surgical Population. J Pediatr Pharmacol Ther 2019; 24:107-116. [PMID: 31019403 DOI: 10.5863/1551-6776-24.2.107] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
OBJECTIVE Vancomycin is often used in the pediatric cardiac surgical population, but few pharmacokinetic data are available to guide dosing. METHODS A retrospective, population pharmacokinetic study was performed for patients <19 years of age initiated on vancomycin after cardiac surgery in the cardiac intensive care unit from 2011-2016 in our institution. Patient data were summarized by using descriptive statistical methods, and population pharmacokinetic analysis was performed by using NONMEM. Simulation was performed to determine a dosing strategy that most frequently obtained an AUC0-24:MIC (minimum inhibitory concentration) ratio of >400. RESULTS A total of 261 patients (281 cardiac surgical procedures, cardiopulmonary bypass 82.3%) met inclusion criteria (60.1% male, median age 0.31 [IQR, 0.07-0.77] years). Vancomycin (14.5 ± 1.7 mg/kg/dose) was administered at median postoperative day 9 (IQR, 4-14), with a mean serum concentration of 11.5 ± 5.5 mg/L at 8.9 ± 3.8 hours after a dose. Population pharmacokinetic analysis demonstrated that a 1-compartment proportional error model with allometrically scaled weight best fit the data, with creatinine clearance and postmenstrual age as significant covariates. Simulation identified that a dosing regimen of 20 mg/kg/dose every 8 hours was most likely to achieve an AUC0-24:MIC ratio > 400 at a mean trough serum concentration of 12.9 ± 3.2 mg/L. CONCLUSIONS Vancomycin dosing in the postoperative pediatric cardiac surgical population should incorporate postmenstrual age and creatinine clearance. A vancomycin dose of 20 mg/kg every 8 hours is a reasonable empiric strategy.
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Tyson K, Hutchinson N, Williams S, Scutt G. Identification of clinical factors predicting warfarin sensitivity after cardiac surgery. Ther Adv Drug Saf 2018; 9:415-424. [PMID: 30364757 DOI: 10.1177/2042098618776541] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 04/23/2018] [Indexed: 11/15/2022] Open
Abstract
Background Warfarin is commonly initiated post-cardiac surgery to reduce the risk of intracardiac thrombus formation. Studies have found that sensitivity is increased after cardiac surgery and anticoagulation is subsequently difficult to manage. This study set out to identify clinical markers of increased warfarin sensitivity in patients after cardiac surgery, and build a model that can predict warfarin sensitivity, and improve safety in this setting. Methods The study was an observational, retrospective cohort design. Clinical parameters including left ventricular ejection fraction (LVEF), cross-clamp time, age, serum albumin and C-reactive protein concentrations were collected from consenting patients who had undergone cardiac surgery and were prescribed postoperative warfarin. The warfarin dose index (WDI) was calculated for each patient from their international normalized ratio (INR) and warfarin dose, as a measure of sensitivity. Results A total of 41 patients were recruited to the study. Logarithmically transformed WDI (log WDI) significantly correlated with LVEF, cardiopulmonary bypass (CPB) time, cross-clamp time, baseline INR and co-administration of amiodarone (p < 0.05). When added to a linear regression model, LVEF and cross-clamp time produced a model that accounted for 41% of the variance in log WDI (R2 = 0.41), p = 0.0002). Applying a log WDI cutoff value of -0.349 discriminated between patients who develop an INR > 4 and those who do not, with a sensitivity of 75% and a specificity of 70%. Conclusions This single-centre study has highlighted two risk factors for increased warfarin sensitivity post-cardiac surgery. Further research is needed to confirm these findings in a wider, more diverse population, and to validate this model.
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Affiliation(s)
- Karen Tyson
- Pharmacy Department, Brighton and Sussex University Hospitals NHS Trust, Brighton, UKBrighton and Sussex Centre for Medicines Optimisation, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
| | - Nevil Hutchinson
- Department of Anaesthesia, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK
| | - Sian Williams
- Brighton and Sussex Centre for Medicines Optimisation, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
| | - Greg Scutt
- Brighton and Sussex Centre for Medicines Optimisation. School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, BN2 4GJ, UK
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9
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Sikma MA, van Maarseveen EM, van de Graaf EA, Kirkels JH, Verhaar MC, Donker DW, Kesecioglu J, Meulenbelt J. Pharmacokinetics and Toxicity of Tacrolimus Early After Heart and Lung Transplantation. Am J Transplant 2015; 15:2301-13. [PMID: 26053114 DOI: 10.1111/ajt.13309] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/16/2015] [Accepted: 03/08/2015] [Indexed: 01/25/2023]
Abstract
Annually, about 8000 heart and lung transplantations are successfully performed worldwide. However, morbidity and mortality still pose a major concern. Renal failure in heart and lung transplant recipients is an essential adverse cause of morbidity and mortality, often originating in the early postoperative phase. At this time of clinical instability, the kidneys are exposed to numerous nephrotoxic stimuli. Among these, tacrolimus toxicity plays an important role, and its pharmacokinetics may be significantly altered in this critical phase by fluctuating drug absorption, changed protein metabolism, anemia and (multi-) organ failure. Limited understanding of tacrolimus pharmacokinetics in these circumstances is hampering daily practice. Tacrolimus dose adjustments are generally based on whole blood trough levels, which widely vary early after transplantation. Moreover, whole blood trough levels are difficult to predict and are poorly related to the area under the concentration-time curve. Even within the therapeutic range, toxicity may occur. These shortcomings of tacrolimus monitoring may not hold for the unbound tacrolimus plasma concentrations, which may better reflect tacrolimus toxicity. This review focuses on posttransplant tacrolimus pharmacokinetics, discusses relevant factors influencing the unbound tacrolimus concentrations and tacrolimus (nephro-) toxicity in heart and lung transplantation patients.
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Affiliation(s)
- M A Sikma
- Department of Intensive Care Medicine and National Poisons Information Center, University Medical Center of Utrecht, the Netherlands
| | - E M van Maarseveen
- Department of Clinical Pharmacy, University Medical Center of Utrecht, the Netherlands
| | - E A van de Graaf
- Department of Lung Transplantation, University Medical Center of Utrecht, the Netherlands
| | - J H Kirkels
- Department of Heart Transplantation, University Medical Center of Utrecht, the Netherlands
| | - M C Verhaar
- Department of Nephrology and Hypertension, University Medical Center of Utrecht, the Netherlands
| | - D W Donker
- Department of Intensive Care Medicine, University Medical Center of Utrecht, the Netherlands
| | - J Kesecioglu
- Department of Intensive Care Medicine, University Medical Center of Utrecht, the Netherlands
| | - J Meulenbelt
- Department of Intensive Care Medicine, National Poisons Information Center, Institute for Risk Assessment Sciences, University of Utrecht, the Netherlands
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10
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Weeks PA, Sieg A, Paruthi C, Rajapreyar I. Antiplatelet Therapy Considerations in Ischemic Cardiogenic Shock. J Cardiovasc Pharmacol Ther 2015; 20:370-7. [DOI: 10.1177/1074248415571456] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/07/2015] [Indexed: 11/15/2022]
Abstract
Dual antiplatelet therapy with aspirin and a P2Y12 receptor antagonist remains a mainstay in the prevention of ischemic events following coronary stent placement. Significant controversy exists regarding the optimal management of high platelet reactivity despite antiplatelet therapy; however this finding has been consistently associated with poor clinical outcomes including greater risk of stent thrombosis and myocardial infarction. Variability in antiplatelet effects of clopidogrel and prasugrel has been linked to genetic polymorphisms and potential drug–drug interactions. Both of these factors have significant influence on the cytochrome P-450 enzyme system activity of the liver responsible for their biotransformation to the active form of both drugs. Very little has been publicized regarding differences in antiplatelet effects which may be associated with conditions in which the functional capacity of the liver may be temporarily compromised. Patients who present with cardiogenic shock due to acute coronary syndromes have evidence of multiorgan dysfunction including liver dysfunction that may affect the activity of these drugs. This review aims to explore existing evidence and propose additional considerations to the selection of antiplatelet therapy in patients with cardiogenic shock who receive catheter-based revascularization and stent placement.
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Affiliation(s)
- Phillip A. Weeks
- Department of Pharmacy, Memorial Hermann—Texas Medical Center, Houston, TX, USA
| | - Adam Sieg
- Department of Pharmacy, Memorial Hermann—Texas Medical Center, Houston, TX, USA
| | - Christina Paruthi
- Center for Advanced Heart Failure, University of Texas Health Science Center, Houston, TX, USA
| | - Indranee Rajapreyar
- Center for Advanced Heart Failure, University of Texas Health Science Center, Houston, TX, USA
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The effect of pathophysiology on pharmacokinetics in the critically ill patient--concepts appraised by the example of antimicrobial agents. Adv Drug Deliv Rev 2014; 77:3-11. [PMID: 25038549 DOI: 10.1016/j.addr.2014.07.006] [Citation(s) in RCA: 297] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 06/30/2014] [Accepted: 07/08/2014] [Indexed: 12/14/2022]
Abstract
Critically ill patients are at high risk for development of life-threatening infection leading to sepsis and multiple organ failure. Adequate antimicrobial therapy is pivotal for optimizing the chances of survival. However, efficient dosing is problematic because pathophysiological changes associated with critical illness impact on pharmacokinetics of mainly hydrophilic antimicrobials. Concentrations of hydrophilic antimicrobials may be increased because of decreased renal clearance due to acute kidney injury. Alternatively, antimicrobial concentrations may be decreased because of increased volume of distribution and augmented renal clearance provoked by systemic inflammatory response syndrome, capillary leak, decreased protein binding and administration of intravenous fluids and inotropes. Often multiple conditions that may influence pharmacokinetics are present at the same time thereby excessively complicating the prediction of adequate concentrations. In general, conditions leading to underdosing are predominant. Yet, since prediction of serum concentrations remains difficult, therapeutic drug monitoring for individual fine-tuning of antimicrobial therapy seems the way forward.
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Bernard A, Vaccaro N, Acharya M, Jiao J, Monbaliu J, De Vries R, Stieltjes H, Yu M, Tran N, Chien C. Impact on abiraterone pharmacokinetics and safety: Open-label drug-drug interaction studies with ketoconazole and rifampicin. Clin Pharmacol Drug Dev 2014; 4:63-73. [DOI: 10.1002/cpdd.132] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 05/08/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Apexa Bernard
- Janssen Research & Development; Clinical Pharmacology; Raritan NJ USA
| | - Nicole Vaccaro
- Janssen Research & Development; Clinical Pharmacology; San Diego CA USA
| | - Milin Acharya
- Janssen Research & Development; Clinical Pharmacology; Raritan NJ USA
| | - James Jiao
- Janssen Research & Development; Biometrics and Reporting; Raritan NJ USA
| | - Johan Monbaliu
- Janssen Research & Development; Preclinical Project Development; Beerse Belgium
| | | | - Hans Stieltjes
- Janssen Research & Development; Bioanalysis; Beerse Belgium
| | - Margaret Yu
- Janssen Research & Development; WC Clinical Oncology; Los Angeles CA USA
| | - Namphuong Tran
- Janssen Research & Development; WC Clinical Oncology; Los Angeles CA USA
| | - Caly Chien
- Janssen Research & Development; Clinical Pharmacology; Titusville NJ USA
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Abstract
Adopted orphan nuclear receptor (NR), pregnane X receptor (PXR), plays a central role in the regulation of xeno- and endobiotic metabolism. Since the discovery of the functional role of PXR in 1998, there is evolving evidence for the role of PXR agonists in abrogating metabolic pathophysiology (e.g., cholestasis, hypercholesterolemia, and inflammation). However, more recently, it is clear that PXR is also an important mediator of adverse xeno- (e.g., enhances acetaminophen toxicity) and endobiotic (e.g., hepatic steatosis) metabolic phenotypes. Moreover, in cancer therapeutics, PXR activation can induce drug resistance, and there is growing evidence for tissue-specific enhancement of the malignant phenotype. Thus, in these instances, there may be a role for PXR antagonists. However, as opposed to the discovery efforts for PXR agonists, there are only a few antagonists described. The mode of action of these antagonists (e.g., sulforaphane) remains less clear. Our laboratory efforts have focused on this question. Since the original discovery of azoles analogs as PXR antagonists, we have preliminarily defined an important PXR antagonist pharmacophore and developed less-toxic PXR antagonists. In this review, we describe our published and unpublished findings on recent structure-function studies involving the azole chemical scaffold. Further work in the future is needed to fully define potent, more-selective PXR antagonists that may be useful in clinical application.
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Affiliation(s)
- Sridhar Mani
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
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Abstract
Controversy reigns as to how protein binding changes alter the time course of unbound drug concentrations in patients. Given that the unbound concentration is responsible for drug efficacy and potential drug toxicity, this area is of significant interest to clinicians and academics worldwide. The present uncertainty means that many questions relating to this area exist, including "How important is protein binding?", "Is protein binding always constant?", "Do pH and temperature changes alter binding?" and "How do protein binding changes affect dosing requirements?". In this paper, we seek to address these questions and consider the data associated with altered pharmacokinetics in the presence of changes in protein binding and the clinical consequences that these may have on therapy, using examples from the critical care area. The published literature consistently indicates that a change in the protein binding and unbound concentrations of some drugs are common in certain specific patient groups such as the critically ill. Changes in pharmacokinetic parameters, including clearance and apparent volume of distribution (V(d)), may be dramatic. Drugs with high protein binding, high intrinsic clearance (e.g. clearance by glomerular filtration) and where dosing is not titrated to effect are most likely to be affected in a clinical context. Drugs such as highly protein bound antibacterials with multiple half-lives within a dosing interval and that have some level of renal clearance, such as ertapenem, teicoplanin, ceftriaxone and flucloxacillin, are commonly affected. In response to these challenges, clinicians need to adapt dosing regimens rationally based on the pharmacokinetic/pharmacodynamic characteristics of the drug. We propose that further pharmacokinetic modelling-based research is required to enable the design of robust dosing regimens for drugs affected by altered protein binding.
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Affiliation(s)
- Jason A Roberts
- Burns, Trauma and Critical Care Research Centre, The University of Queensland, Level 3, Ned Hanlon Building, Royal Brisbane and Women's Hospital, Herston, Brisbane, QLD, 4029, Australia.
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Abstract
Diagnosing and managing critically ill patients with renal dysfunction is a part of the daily routine of an intensivist. Acute kidney insufficiency substantially contributes to the morbidity and mortality of critically ill patients. Renal replacement therapy (RRT) not only does play a significant role in the treatment of patients with renal failure, acute as well as chronic, but also has spread its domains to the treatment of many other disease conditions such as myaesthenia gravis, septic shock and acute on chronic liver failure. This article briefly outlines the role of renal replacement therapy in ICU.
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Affiliation(s)
- C Deepa
- Narayana Hrudayalaya, Bangalore, Karnataka, India
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Lautrette A, Phan TN, Ouchchane L, Aithssain A, Tixier V, Heng AE, Souweine B. High creatinine clearance in critically ill patients with community-acquired acute infectious meningitis. BMC Nephrol 2012; 13:124. [PMID: 23013403 PMCID: PMC3502432 DOI: 10.1186/1471-2369-13-124] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 09/22/2012] [Indexed: 01/11/2023] Open
Abstract
Background A high dose of anti-infective agents is recommended when treating infectious meningitis. High creatinine clearance (CrCl) may affect the pharmacokinetic / pharmacodynamic relationships of anti-infective drugs eliminated by the kidneys. We recorded the incidence of high CrCl in intensive care unit (ICU) patients admitted with meningitis and assessed the diagnostic accuracy of two common methods used to identify high CrCl. Methods Observational study performed in consecutive patients admitted with community-acquired acute infectious meningitis (defined by >7 white blood cells/mm3 in cerebral spinal fluid) between January 2006 and December 2009 to one medical ICU. During the first 7 days following ICU admission, CrCl was measured from 24-hr urine samples (24-hr-UV/P creatinine) and estimated according to Cockcroft-Gault formula and the simplified Modification of Diet in Renal Disease (MDRD) equation. High CrCl was defined as CrCl >140 ml/min/1.73 m2 by 24-hr-UV/P creatinine. Diagnostic accuracy was performed with ROC curves analysis. Results Thirty two patients were included. High CrCl was present in 8 patients (25%) on ICU admission and in 15 patients (47%) during the first 7 ICU days for a median duration of 3 (1-4) days. For the Cockcroft-Gault formula, the best threshold to predict high CrCl was 101 ml/min/1.73 m2 (sensitivity: 0.96, specificity: 0.75, AUC = 0.90 ± 0.03) with a negative likelihood ratio of 0.06. For the simplified MDRD equation, the best threshold to predict high CrCl was 108 ml/min/1.73 m2 (sensitivity: 0.91, specificity: 0.80, AUC = 0.88 ± 0.03) with a negative likelihood ratio of 0.11. There was no difference between the estimated methods in the diagnostic accuracy of identifying high CrCl (p = 0.30). Conclusions High CrCl is frequently observed in ICU patients admitted with community-acquired acute infectious meningitis. The estimated methods of CrCl could be used as a screening tool to identify high CrCl.
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Affiliation(s)
- Alexandre Lautrette
- Department of Intensive Care Unit, University hospital of Clermont-Ferrand, Clermont-Ferrand, France.
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A GENS-based approach to cardiovascular pharmacology: impact on metabolism, pharmacokinetics and pharmacodynamics. Ther Deliv 2012; 2:1437-53. [PMID: 22826875 DOI: 10.4155/tde.11.117] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Pharmacological outcomes depend on many factors, with many of them being sexually dimorphic. Thus, physiological gender/sex (GENS) differences can influence pharmacokinetics, pharmacodynamics and, thus, bioavailability and resulting in efficacy of treatment, meaning GENS differences should be an important consideration in therapeutics. In particular, drug response can change according to different hormonal environments. Therefore, GENS-specific differences have a particular clinical relevance in terms of drug delivery, especially for those substances with a narrow therapeutic margin. Since adverse effects are more frequent among women, safety is a key issue. Overall, the status of women, from a pharmacological point of view, is often different and less studied than that of men and deserves particular attention. Further studies focused on women's responses to drugs are necessary in order to make optimal pharmacotherapeutic decisions.
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Smith BS, Yogaratnam D, Levasseur-Franklin KE, Forni A, Fong J. Introduction to drug pharmacokinetics in the critically ill patient. Chest 2012; 141:1327-1336. [PMID: 22553267 DOI: 10.1378/chest.11-1396] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Despite regular use of drugs for critically ill patients, overall data are limited regarding the impact of critical illness on pharmacokinetics (PK). Designing safe and effective drug regimens for patients with critical illness requires an understanding of PK. This article reviews general principles of PK, including absorption, distribution, metabolism, and elimination, and how critical illness can influence these parameters. In the area of drug absorption, we discuss the impact of vasopressor use, delayed gastric emptying and feeding tubes, and nutrient interactions. On the topic of drug distribution, we review fluid resuscitation, alterations in plasma protein binding, and tissue perfusion. With drug metabolism, we discuss hepatic enzyme activity, protein binding, and hepatic blood flow. Finally, we review drug elimination in the critically ill patient and discuss the impact of augmented renal clearance and acute kidney injury on drug therapies. In each section, we highlight select literature reviewing the PK impact of these conditions on a drug PK profile and, where appropriate, provide general suggestions for clinicians on how to modify drug regimens to manage PK challenges.
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Affiliation(s)
| | | | | | | | - Jeffrey Fong
- UMass Memorial Medical Center, Worcester, MA; Massachusetts College of Pharmacy and Health Sciences, Worcester, MA
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Drug dosing consideration in patients with acute and chronic kidney disease-a clinical update from Kidney Disease: Improving Global Outcomes (KDIGO). Kidney Int 2011; 80:1122-37. [PMID: 21918498 DOI: 10.1038/ki.2011.322] [Citation(s) in RCA: 291] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Drug dosage adjustment for patients with acute or chronic kidney disease is an accepted standard of practice. The challenge is how to accurately estimate a patient's kidney function in both acute and chronic kidney disease and determine the influence of renal replacement therapies on drug disposition. Kidney Disease: Improving Global Outcomes (KDIGO) held a conference to investigate these issues and propose recommendations for practitioners, researchers, and those involved in the drug development and regulatory arenas. The conference attendees discussed the major challenges facing drug dosage adjustment for patients with kidney disease. In particular, although glomerular filtration rate is the metric used to guide dose adjustment, kidney disease does affect nonrenal clearances, and this is not adequately considered in most pharmacokinetic studies. There are also inadequate studies in patients receiving all forms of renal replacement therapy and in the pediatric population. The conference generated 37 recommendations for clinical practice, 32 recommendations for future research directions, and 24 recommendations for regulatory agencies (US Food and Drug Administration and European Medicines Agency) to enhance the quality of pharmacokinetic and pharmacodynamic information available to clinicians. The KDIGO Conference highlighted the gaps and focused on crafting paths to the future that will stimulate research and improve the global outcomes of patients with acute and chronic kidney disease.
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20
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Tae YM, Kwak JG, Kim BH, Jang IJ, Kim WH. Population Pharmacokinetic Analysis and Dosing Regimen Optimization of Aprotinin in Neonates and Young Infants Undergoing Cardiopulmonary Bypass. J Clin Pharmacol 2011; 51:1163-1176. [DOI: 10.1177/0091270010379411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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Dasta JF, Boucher BA, Brophy GM, Cohen H, Hassan E, MacLaren R, Muzykovsky K, Martin SJ, Pass SE, Seybert AL. Intravenous to Oral Conversion of Antihypertensives: A Toolkit for Guideline Development. Ann Pharmacother 2010; 44:1430-47. [DOI: 10.1345/aph.1p086] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Objective: To provide a toolkit of information for hospitals to use in developing intravenous to oral conversion protocols for antihypertensives. Data Sources: Articles describing intravenous to oral conversion protocols for any therapeutic category were identified in an English-language MEDLINE search (1990-April 2010) using a wide variety of MeSH terms. References from selected articles were reviewed for additional material. Study Selection and Data Extraction: Experimental and observational English-language studies and review articles that focused on oral transition of intravenous drugs were selected. Data Synthesis: Most of the literature on conversion from intravenous to oral formulations involves antimicrobials. There is considerable evidence documenting reduced costs and improved patient flow through the health-care system following implementing these protocols with drugs like antimicrobials, histamine-2 receptor antagonists, and proton pump inhibitors. Although antihypertensives have not been studied, principles and implementation strategies used for other drug classes can be applied to antihypertensives. Guidance is provided on framing the problem, issues surrounding oral absorption principles, information pertaining to oral conversion in specific disease slates, and implementation and documentation strategies. Detailed tables of oral and intravenous antihypertensives are provided. Conclusions: We recommend that hospitals consider developing protocols on conversion of intravenous to oral antihypertensives in an attempt to reduce unnecessarily prolonged intravenous therapy. Information contained in this article can be used as a toolkit to select information specific to the characteristics of individual health-care systems.
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Affiliation(s)
- Joseph F Dasta
- The Ohio State University, Columbus, OH; Adjunct Professor, The University of Texas, Hutto, TX
| | - Bradley A Boucher
- Clinical Pharmacy, University of Tennessee Health Science Center, Memphis, TN
| | - Gretchen M Brophy
- Pharmacotherapy & Outcomes Science and Neurosurgery, Virginia Commonwealth University, Medical College of Virginia Campus, Richmond, VA
| | - Henry Cohen
- Pharmacy Practice, Arnold & Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Kingsbrook Jewish Medical Center, Brooklyn, NY
| | - Erkan Hassan
- Pharmacotherapy, Philips VISICU, Patient Monitoring Informatics, University of Maryland School of Pharmacy, Department of Pharmacy Practice and Science, Baltimore, MD
| | | | | | - Steven J Martin
- Department of Pharmacy Practice, College of Pharmacy, The University of Toledo, Toledo, OH
| | - Steven E Pass
- Texas Tech University Health Sciences Center School of Pharmacy, Dallas, TX
| | - Amy L Seybert
- Pharmacy and Therapeutics, University of Pittsburgh School of Pharmacy, University of Pittsburgh Medical Center, Pittsburgh, PA
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Parlow J, Gilron I, Milne B, Dumerton-Shore D, Orr E, Phelan R. Cardiopulmonary bypass does not affect plasma concentration of preoperatively administered gabapentin. Can J Anaesth 2010; 57:337-42. [DOI: 10.1007/s12630-010-9269-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Accepted: 01/12/2010] [Indexed: 10/19/2022] Open
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Solana MJ, López-Herce J. Pharmacokinetics of intravenous omeprazole in critically ill paediatric patients. Eur J Clin Pharmacol 2009; 66:323-30. [PMID: 20041322 DOI: 10.1007/s00228-009-0774-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Accepted: 12/02/2009] [Indexed: 11/25/2022]
Abstract
The proton pump inhibitors are first-line drugs for the treatment of a number of gastrointestinal diseases. These drugs have a good safety profile, making it possible to use them in paediatric patients. Although their pharmacokinetics in children has not been extensively studied, research performed suggests that the dose used should be varied as a function of age, as this factor affects the drug's metabolism. Proton pump inhibitors can be used in critically ill children for the prophylaxis and treatment of gastrointestinal haemorrhage, although there is still little experience with this. The most widely used proton pump inhibitor at the present time is omeprazole. As there are specific characteristics of these patients that could alter the pharmacokinetics of the drugs, studies need to be performed to determine the most suitable dose and dosage interval.
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&NA;. Cardiac surgery patients may have clinically relevant changes in the pharmacokinetics of frequently used drugs. DRUGS & THERAPY PERSPECTIVES 2009. [DOI: 10.2165/0042310-200925050-00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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25
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Journal Watch. Pharmaceut Med 2008. [DOI: 10.1007/bf03256711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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