Compare to the active ingredient in Maximum Strength Pepcid AC. Just one tablet of GoodSense Maximum Strength Famotidine Tablets 20 mg prevents and relieves heartburn associated with acid indigestion brought on by eating and drinking certain foods and beverages. This gluten-free heartburn medicine is intended for adults and children 12 years and over. Helps prevent meal-induced heartburn when taken at least 10-60 minutes before eating. Lasts up to 12 hours. Don't let heartburn get between you and your favorite items on the menu, when just one tablet offers maximum strength heartburn relief and prevention for acid indigestion and sour stomach.