What does Pepcid AD stand for?

Pepcid AD stands for "Pepcid Acid Depressant." It is an over-the-counter medication that contains famotidine, which is an H2 receptor antagonist used to reduce stomach acid production. Pepcid AD is commonly used to relieve heartburn, acid indigestion, and upset stomach. The "AD" in the name emphasizes its use for alleviating symptoms associated with excess stomach acid.