The active ingredient in Kirkland Signature Acid Controller Maximum Strength is Famotidine Tablets 20 mg an H2 Blocker. These partially block production of acid in the stomach cells by inhibiting histamine a substance that stimulates the secretion of stomach acid. Over-the-counter and prescription H2 blockers relieve heartburn associated with acid indigestion and sour stomach and prevent meal-induced heartburn.
Product Attributes:

Ship From Zip Code: 78620

Weight (lbs.): 1.03 lb

Length (in.): 10

Width (in.): 2

Height (in.): 12