Anatomy General anatomy c03f0d96 Which of the following drug is an inhibitor of cytochrome p450 enzyme A Ketoconazole B Rifampecin C Phenytoin D Phenobarbitone High-Yield Explanation Ketoconazole is a powerful microsomal enzyme inhibitor where as rifampicin,phenobarbitone and Phenytoin are enzyme inducers Refer KDT 7-e p26