Ask a doctor before use if you have had heartburn over 3 months. This may be a sign of a more serious condition. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away. (1-800-222-1222. Allergy alert Do notuse if you are allergic tofamotidine or other acid reducers. Stop use and ask a doctor if yo ur heartburn continues or worsens you need to take this product for more than 14 days. Do not use if you have trouble or pain swallowing food, vomiting with blood, or b body or blackstools. These may be signs of a serious condition. See your doctor. with other acid reducers. heartburn with lightheaded ness, sweating, or dizziness. chest pain or shoulder pain with shortness of breath; sweating; pain spreading to arms, neck or shoulders; or lightheadedness frequent chest pain frequent wheezing, particularly with heartburn unexplained weight loss na us ea or vomiting I stomach pain kidney disease. Ask a doctor or pharmacist before use if you are taking a prescription drug. Acid reducers may interact with certain prescription drugs.