Quickly relieve heartburn associated with acid indigestion and sour stomach with PEPCID COMPLETE Acid Reducer + Antacid Chewable Tablets. These mint flavored chewable tablets combine a fast working antacid and long lasting acid reducer to help control acid all day and night.* Formulated with calcium carbonate, famotidine, and magnesium hydroxide, this heartburn reliever helps to neutralize and control acid. The dual action formula starts working in seconds and lasts longer than Tums.