Maximum Strength Pepcid AC provides fast-acting prevention and relief of heartburn associated with acid indigestion and sour stomach. These acid-controlling tablets contain famotidine, a known acid reducer that helps control heartburn brought on by eating or drinking certain food and beverages. Keep a package in your bag or at your desk for easy access to treat on-the-go acid indigestion | Pepcid Ac Maximum Strength Acid Controller Size 80s