The impact of Paullinia cupana extract on pharmacokinetics of phenytoin in rats.

연구 요약

The impact of Paullinia cupana extract on pharmacokinetics of phenytoin in rats.

Natural product research 학술지에 발표된 이 연구는 Alves E, Ventura S, Meirinho S 외 연구팀이 수행하였습니다.

이 연구는 'The impact of Paullinia cupana extract on pharmacokinetics of phenytoin in rats.'에 대한 과학적 분석을 제공합니다.

핵심 내용

Epilepsy patients are at a higher risk of developing overweight and obesity. Given the thermogenic properties of Paullinia cupana (Guarana), this study aimed to evaluate a potential pharmacokinetic interaction between P. cupana extract and phenytoin in rats. Two pharmacokinetic studies were developed with P. cupana and phenytoin: a coadministration and a pre-treatment study. Plasma concentrations of phenytoin and its primary metabolite (5-(4-hydroxyphenyl)-5-phenylhydantoin) were determined by HPLC-DAD, and data were analysed by non-compartmental pharmacokinetic methods. Both studies demonstrated a significant delay in the time to reach peak plasma concentration of phenytoin and its primary metabolite. Furthermore, a lower extent of systemic exposure of its primary metabolite was found in the coadministration study. In addition, the pre-treatment study indicated weight loss in the experimental group. These results suggest that concurrent administration of P. cupana extract with phenytoin may compromise the drug's therapeutic efficacy.

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