Which of the following inhibits CYP-P450: (A) grape fruit, (B) Ethanol, (C) Rifampicin, (D) Procainamide
Answer is A. enzyme inhibitors- cimetidine, chloramphenicol, ciprofloxacin, ketoconazole, protease inhibitors like ritonavir, indinavir, saquinavir, and grape fruit juice etc Ref KD Tripathi 8th ed