<prompt> H2 blocker used as anti-ulcer drug:PirenzepineFamotidineRabeprazoleSucralfate  <response>: Ans: b Famotidine Ref: KDT, 6th ed,p. 629DRUGS USED IN PEPTIC ULCER1 H2 antagonists - Ranitidine, cimetidine. famotidine roxatidine and nizatidine.Nizatidine has little first-pass metabolism and a bioavailability of almost 100. Famotidine is the most potent among them.2 Proton pump inhibitors PPIs - Omeprazole, lansoprazole, rabeprazole, pantoprazole, and esomeprazole.They are the most effective drugs in GERD.3 Mucosal protective agents - Sucralfate, colloidal bismuth compounds4 Prostaglandin analogs - Misoprostol5 Antacids6 Anticholinergics - Pirenzipine, propantheline7 Anti-H.pylori drugs - Amoxicillin, clarithromycin, metronidazole, tinidazole, tetracycline. 