is famotidine a histamine blocker
A: Pepcid AC (famotidine) is in a group of drugs called histamine-2 (H2) blockers. H2 blockers work by decreasing the amount of acid the stomach produces. Pepcid AC is used to treat and prevent heartburn associated with acid indigestion and sour stomach.epcid sold OTC is used to help prevent and treat heartburn symptoms, such as indigestion or having a sour stomach after eating foods and drinking beverages that disagree with you. Pepcid belongs to a class of drug called histamine-2 or H2 blockers, which work by reducing the amount of acid your stomach produces.