ANTACID: Major Calcium Carbonate 500 mg chewable tablets help relieve acid indigestion, heartburn, sour stomach, and upset stomach associated with these symptoms. ACTIVE INGREDIENT: Each chewable tablet contains calcium carbonate USP 500 mg as an antacid. Store at room temperature. HOW TO USE: Adults and children 12 years of age and over: chew 2-4 tablets as symptoms occur or as directed by a doctor. Do not swallow the tablets whole. Do not take for symptoms that persist for more than 2 weeks unless advised by a doctor. QUALITY FORMULATION: We maintain high standards of care through strict regulatory compliance to deliver carefully formulated antacid tablets. MAJOR PHARMACEUTICALS: At Major Pharmaceuticals, we believe wellness should be accessible to everyone. We pride ourselves on our legacy of delivering quality OTC and vitamin supplements. Major Calcium Carbonate Antacid Tablets are a regular strength solution to help relieve acid indigestion, heartburn, sour stomach, and upset stomach associated with these symptoms. Ask a doctor or pharmacist before use if you are presently taking a prescription drug. Antacids may interact with certain prescription drugs. When using this product, do not take more than 15 tablets in 24 hours. If you are pregnant, do not take more than 10 tablets in 24 hours.