Heartburn and indigestion symptoms occur when the stomach produces too much stomach acid. Zantac 75 and Zantac 75 Relief contain ranitidine, which belongs to a group of medicines known as H2 blockers. Ranitidine inhibits histamine, a chemical that stimulates the secretion of stomach acid, and this partially blocks the production of stomach acid.
Zantac 75 and Zantac 75 Relief tablets are for the short-term relief of heartburn and indigestion symptoms, including acid reflux.