Used to treat conditions involving excess stomach acid, such as gastroesophageal reflux disease (GERD), erosive esophagitis, and Zollinger-Ellison syndrome. It works by reducing the amount of acid produced in the stomach, allowing healing of damaged tissue and relieving symptoms like heartburn and acid regurgitation. Commonly prescribed for short-term and long-term management of acid-related disorders, it is often part of combination therapy for Helicobacter pylori eradication. Available in oral and intravenous forms, it is suitable for both outpatient and hospital use.