Famotidine is a medication that belongs to a class of drugs known as H2 blockers. It works by reducing the amount of stomach acid produced by the cells in the stomach lining. This helps alleviate symptoms associated with conditions like gastroesophageal reflux disease (GERD) and peptic ulcers. Famotidine is commonly used to treat heartburn, indigestion, and other related issues. It is available in both prescription and over-the-counter forms, making it accessible for many people. Side effects are generally mild but can include headaches or dizziness in some individuals.