Obese Children Require Lower Doses of Pantoprazole Than Nonobese Peers to Achieve Equal Systemic Drug Exposures - 31/01/18
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on behalf of the
Best Pharmaceuticals for Children Act – Pediatric Trials Network*
Abstract |
Objective |
To assess appropriate pantoprazole dosing for obese children, we conducted a prospective pharmacokinetics (PK) investigation of pantoprazole in obese children, a patient population that is traditionally excluded from clinical trials.
Study design |
A total of 41 obese children (6-17 years of age), genotyped for CYP2C19 variants * 2, * 3, * 4, and * 17, received a single oral dose of pantoprazole, ~1.2 mg/kg lean body weight (LBW), with LBW calculated via a validated formula. Ten post-dose pantoprazole plasma concentrations were measured, and PK variables generated via noncompartmental methods (WinNonlin). Linear and nonlinear regression analyses and analyses of variance were used to explore obesity, age, and CYP2C19 genotype contribution to pantoprazole PK. PK variables of interest were compared with historic nonobese peers treated with pantoprazole.
Results |
Independent of genotype, when normalized to dose per kg total body weight, pantoprazole apparent clearance and apparent volume of distribution were significantly lower (P < .05) and systemic exposure significantly higher (P < .01) in obese vs nonobese children. When normalized per kg LBW, these differences were not evident in children ≥12 years of age and markedly reduced in children <12 years of age.
Conclusions |
LBW dosing of pantoprazole led to pantoprazole PK similar to nonobese peers. Additional factors, other than body size (eg, age-related changes in CYP2C19 activity), appear to affect pantoprazole PK in children <12 years of age.
Trial registration |
ClinicalTrials.gov: NCT02186652
Le texte complet de cet article est disponible en PDF.Keywords : pharmacokinetics, obesity, pediatrics, proton pump inhibitors
Abbreviations : AE, AUC, AUCinf, AUClast, BMI, CL/F, Cmax, CYP, CYP2C19, CYP2C19, EMs, FDA, GERD, IMs, LBW, PK, PM, PPIs, t1/2, TBW, Tmax, Vd/F
Plan
Supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Pediatric Trials Network (NICHD-2012-PAN01). P.S. receives research support from the National Institutes of Health (NIH-1R21HD080606-01A1) and the National Institute of Child Health and Human Development (HHSN275201000003I). The other authors declare no conflicts of interest. |
Vol 193
P. 102 - février 2018 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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