Other Information: Store below 86 degrees F (30 degrees C). Keep the container tightly closed. For calcium and magnesium content see Supplement Facts. Misc: Calcium carbonate 750 mg. Antacid/calcium supplement. Relieves: acid indigestion; sour stomach; heartburn. Naturally and artificially flavored. Compared to Tums Extra Strength active ingredient (This product is not manufactured or distributed by GlaxoSmithKline, the distributor of Tums.). Antacid, per Tablet. Uses: Relieves heartburn, sour stomach, acid indigestion, upset stomach associated with these symptoms. Calcium Supplement: As a daily source of extra calcium.