Quickly relieve heartburn associated with acid indigestion and sour stomach with Pepcid Complete Acid Reducer + Antacid Chewable Tablets. The dual-action formula starts neutralizing acid in seconds and lasts longer, so you don't have to choose between hurting now or hurting later. 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.