This document provides information on drugs used to treat peptic ulcer disease. It discusses proton pump inhibitors like omeprazole, pantoprazole, and rabeprazole which work by inhibiting acid production in the stomach. It also covers H2 receptor antagonists like ranitidine, cimetidine, and famotidine which block histamine receptors and reduce acid secretion. Other drug classes discussed are anticholinergics which decrease stomach motility, and misoprostol which has antisecretory and mucosal protective properties. The document provides details on the mechanisms, indications, dosages, and side effects of these various antiulcer drugs.