Relieves: heartburn; sour stomach; acid indigestion. Goes to work instantly.Active Ingredients: Antacid: In Each Tablet: Calcium Carbonate USP 1000 mg; Magnesium Hydroxide USP 200 mg. Calcium Supplement: 2 Tablets: Calories 12; Total Carb 2 g (Sugars 2 g); Calcium 800 mg; Magnesium 170 mg; Sucrose; Dextrose; Stearic Acid; Magnesium Stearate; Silicon Dioxide; Natural and Artificial Flavors; Red 40 Lake; Yellow 6 Lake; Yellow 5 Lake; Blue 1 Lake; Sucralose