Maximum Strength Pepcid AC Heartburn Relief Tablets with famotidine provide fast-acting prevention and relief of heartburn associated with acid indigestion and sour stomach. Each maximum strength acid controlling tablet is specially formulated with 20 mg of famotidine a known acid reducer that relieves 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 heartburn on-the-go. You can take just one Maximum Strength Pepcid AC as little as 10 minutes before eating and 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 and 12-hour acid control studies during the night. Acid control does not imply symptom relief.