Identify the class of drug :
Cimetidine

Explanation

**Step-by-Step Solution:**

1. **Understanding Cimetidine**: Cimetidine is a medication that is commonly used to treat conditions related to excessive stomach acid.

2. **Recognizing its Use**: Cimetidine is primarily used to relieve symptoms of heartburn, acid indigestion, and stomach ulcers. It helps in reducing the amount of acid produced in the stomach.

3. **Identifying the Class of Drug**: Based on its function and use, Cimetidine belongs to a class of drugs known as H2-receptor antagonists (H2 blockers). These drugs work by blocking histamine H2 receptors in the stomach lining, which decreases acid production.

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