It belongs to a class of drugs known as H2 receptor antagonists (or H2 blockers), which work by reducing the amount of acid produced in the stomach. Below are the common uses of Cimetidine:
Common Uses

• Gastric and Duodenal Ulcers: Cimetidine is often prescribed to treat gastric (stomach) and duodenal (upper small intestine) ulcers by reducing stomach acid, allowing the ulcer to heal and preventing further damage.
• Acid Reflux: Cimetidine is used to treat GERD, a condition where stomach acid frequently flows back into the esophagus, causing heartburn and irritation. By reducing acid production, Cimetidine helps alleviate these symptoms.
• Hypersecretory Condition: Cimetidine is used to treat Zollinger-Ellison Syndrome, a rare condition in which one or more tumors in the pancreas or duodenum cause the stomach to produce too much acid. Cimetidine helps manage this excess acid production.
• Over-the-Counter Use: In some cases, Cimetidine is available over the counter for the short-term relief of heartburn, acid indigestion, and sour stomach. It is taken before meals or at bedtime to prevent symptoms.