Used to treat conditions involving excess stomach acid such as gastroesophageal reflux disease (GERD), peptic ulcer disease, and Zollinger-Ellison syndrome. It helps reduce acid production in the stomach, relieving symptoms like heartburn and acid regurgitation. Commonly prescribed for short-term healing of erosive esophagitis and long-term maintenance therapy. Often used in combination with antibiotics to eradicate Helicobacter pylori infection. Also administered in hospitalized patients to prevent stress-related gastric bleeding. Available in oral and intravenous forms for flexibility in treatment settings.