**Question:** Cytoprotective drug in peptic ulcer is -

A. Omeprazole
B. Sucralfate
C. Misoprostol
D. Ranitidine

**Core Concept:** Peptic ulcer is a condition characterized by the formation of an open sore (ulcer) in the lining of the stomach or the duodenum (first part of the small intestine). Cytoprotective drugs are medications that protect the gastric mucosa (lining of the stomach) from damage caused by various factors like acid secretion, oxidative stress, and inflammation.

**Why the Correct Answer is Right:** B. Sucralfate is a cytoprotective drug primarily used for the treatment of peptic ulcers and gastroesophageal reflux disease (GERD). It forms a protective barrier over the ulcer site, preventing further gastric acid and pepsin erosion and promoting ulcer healing.

**Why Each Wrong Option is Incorrect:**

A. Omeprazole (PPI) and D. Ranitidine (H2-receptor antagonist) are proton pump inhibitors (PPIs) and histamine H2-receptor antagonists, respectively, that decrease gastric acid secretion. Although they reduce acidity, they do not directly protect the gastric mucosa from damage.

C. Misoprostol is a prostaglandin analog used for the prevention and treatment of gastric ulcers, but it is not specifically designed as a cytoprotective agent like sucralfate is.

**Clinical Pearl:** Cytoprotective drugs like Sucralfate are important in managing peptic ulcers and GERD as they directly protect the gastric mucosa, promoting healing and reducing the risk of complications like bleeding and perforation. However, these drugs should not be used in place of acid suppression therapy when indicated, as acid reduction is also essential for ulcer healing and prevention of complications.