Famotidine (brand name: Pepcid) What it's for: Famotidine is primarily used in the treatment of conditions associated with excessive stomach acid production. One of its main applications is the management of peptic ulcers, addressing sores that form on the stomach or small intestine lining. Additionally, famotidine is commonly prescribed for Gastroesophageal Reflux Disease (GERD), a condition characterized by the backflow of stomach acid into the esophagus, leading to heartburn and irritation. H