Used primarily to reduce stomach acid production, this compound is widely applied in treating gastrointestinal conditions such as peptic ulcers, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome. It helps heal ulcers by blocking histamine action in the stomach lining, thereby decreasing acid secretion. It is also used to relieve symptoms of heartburn and acid indigestion. Due to its long duration of action and high potency, it is often preferred over older antihistamines in ulcer management. Available in oral and injectable forms, it supports both short-term symptom relief and long-term maintenance therapy.