Famocid 40 mg is an acid reducer that is used to treat and prevent stomach and intestinal ulcers primarily. It is also used to treat conditions characterized by excessive acid production in the stomach like Zollinger-Ellison syndrome. Famotidine may be given to people who have gastro-esophageal reflux disease or GERD and other conditions in which the stomach acid flows into the esophagus and causes heartburn. Famocid 40 mg tablets contain Famotidine, a histamine-2 blocker drug and belongs to a family of drugs called histamine-2 blockers. This drug functions by lowering the natural production of acid in the stomach. The medicine is available as various brands across the globe, some of which are Pepcid and Famocid (Sun Pharma) .