Sugiyama, Ikuo, Bouillon, Thomas, Yamaguchi, Masayuki, Suzuki, Hikoe, Hirota, Takashi and Fink, Martin (2015) Population pharmacokinetic analysis for 10-monohydroxy derivative of oxcarbazepine in Japanese pediatric epileptic patients. Drug Metabolism and Pharmacokinetics .

Abstract

Oxcarbazepine is an anti-epileptic drug, which is almost completely metabolized by cytosolic enzymes in the liver to the active 10-monohyroxy metabolite (MHD) following oral administration. The pharmacokinetic (PK) profiles of MHD were evaluated in Japanese pediatric epileptic patients and a possible ethnic difference in PK of MHD between Japanese and non-Japanese pediatric patients was assessed. A non-linear mixed effect modeling approach was used to determine the PK of MHD. A one-compartment population model with first-order absorption appropriately described the PK of MHD. No clinically relevant differences were found for using body surface area or weight to explain between-patient variability, therefore the final model included the effects of body weight on apparent clearance (CL/F) and apparent volume of distribution (V/F) of MHD, and in addition, the effect of 3 concomitant anti-epileptic drugs (carbamazepine, phenobarbital and phenytoin) on CL/F of MHD. Inclusion of ethnicity as a covariate in the final model, concluded no ethnic difference with respect to CL/F of MHD between Japanese and non-Japanese patients. Hence, oxcarbazepine can be generally applied using the same dosage and administration for the treatment of partial onset seizures in pediatric patients, regardless of ethnicity.

Item Type:	Article
Keywords:	Population PK, oxcarbazepine, Japanese population, pediatrics, epilepsy, ethnic sensitivity assessment
Date Deposited:	28 Apr 2016 23:45
Last Modified:	28 Apr 2016 23:45
URI:	https://oak.novartis.com/id/eprint/23045