What is the primary use of Pepcid?

Pepcid, also known by its generic name famotidine, is primarily used to treat gastroesophageal reflux disease (GERD) and other conditions associated with excess stomach acid. GERD occurs when stomach acid flows back into the esophagus, leading to symptoms such as heartburn and discomfort. Pepcid works by blocking histamine H2 receptors in the stomach lining, which decreases the production of stomach acid and helps alleviate these symptoms.

In addition to GERD, Pepcid is also used to treat conditions like gastric ulcers and Zollinger-Ellison syndrome. Its role in reducing stomach acid levels makes it effective for managing these gastrointestinal issues, which is why option B is the correct choice.

The other options, such as diabetes management, pain relief, and fungal infections, represent different areas of treatment and do not relate to the mechanism or the therapeutic uses of Pepcid.