Maximum Strength Pepcid AC Heartburn Relief Tablets with famotidine provide fast-acting prevention & relief of heartburn associated with acid indigestion & sour stomach. Each maximum strength acid reducer tablet is formulated with 20 mg of famotidine, a known acid reducer that relieves heartburn brought on by eating or drinking certain foods & beverages. Keep a package of Pepcid (R) in your bag or at your desk for easy access to treat heartburn on the go. You can take just one Maximum Strength Pepcid AC for acid indigestion relief as little as 10 minutes before eating, & know you have acid control on your side all day or all night. Adults & children 12+, swallow 1 tablet with a glass of water to relieve symptoms; do not chew. Do not take more than 2 tablets in 24 hours. Prevents heartburn if taken 10 to 60 minutes before a meal. Based on 9-hour acid control studies during the day & 12-hour acid control studies during the night. Acid control does not imply symptom relief.