Great deal on portable Antacid tablets. Use for the relief of heartburn, sour stomach, acid indigestion, and upset stomach associated with these symptoms. These Antacid packets are great to carry around in purses, wallets, survival (first aid) kits, the glove box, or even in pockets. Active Ingredient: Calcium Carbonate 420 mg. You get 100 individual packets with 2 tablets in each pack.