Amazon Basic Care Omeprazole Delayed Release Tablets 20 mg, Acid Reducer, Treats Frequent Heartburn, 42 Count

Acid reducers provide relief for 6-12 hours by inhibiting histamine—a substance that stimulates secretion of stomach acid—to partially block production of acid in the stomach cells. Taken up to an hour before a meal, histamine H2-receptor antagonists (H2 blockers) work to relieve and prevent heartburn associated with meal-induced acid indigestion.