WHich of the following proton pump inhibitor has enzyme inhibitory activity?: (A) Rabeprazole, (B) Lansoprazole, (C) Pantoprazole, (D) Omeprazole
Answer is D. Omeprazole and esomoprazole are microsomal anzymes inhibitors .these may decrease the metabolism of diazepam. Lansoprazole enhances the metabolism of theophyllin .(katzung 11/e p1075)