Pepcid® AC Acid Reducer, Tablets Just one Tablet! Relieves & Prevents Heartburn Due to Acid Indigestion. 1 Tablet relieves heartburn and acid indigestion (Read Package Insert before use). Pepcid® AC prevents heartburn and acid indigestion brought on by eating and drinking certain foods and beverages. The Pepcid® AC Brand name is a guarantee of our commitment to you. We have worked hard to earn your trust and we'll work even harder to maintain it.