Rabeprazole is used for:

Treating duodenal ulcers, gastroesophageal reflux disease (GERD), erosive or ulcerative GERD, and a condition where pancreatic tumors cause over-production of gastric acid (Zollinger-Ellison Syndrome). It also may be used with certain antibiotics to treat certain types of ulcers. It may also be used to treat other conditions as determined by your doctor.

Rabeprazole is a proton pump inhibitor (PPI). It works by reducing gastric acid secretion by blocking the final step of acid production by the stomach lining...