Cimetidine inhibits the metabolism of all of the following drugs except.: (A) Phenytoin, (B) Warfarin, (C) Ketoconazole, (D) Diazepam
Answer is C. Ans. (C) Ketoconazole(Ref: KDT 8th/e p698)Cimetidine is a potent inhibitor of microsomal enzymes. It prolongs the half lives of warfarin, theophylline, phenytoin, oral hypoglycemic agents, alcohol and benzodiazepines.