Warnings: Allergy alert: Do not use if you are allergic to famotidine or other acid reducers. Do not use: if you have trouble or pain swallowing food, vomiting with blood, or bloody or black stools (These may be signs of a serious condition. See your doctor); if you have kidney disease, except under the advice and supervision of a doctor; with other acid reducers. Ask a doctor before use if you have: had heartburn over 3 months (This may be a sign of a more serious condition); heartburn with lightheadedness, 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; nausea or vomiting; stomach pain. Stop use and ask a doctor if: your heartburn continues or worsens; you need to take this product for more than 14 days. Pregnancy/breast-feeding warning: If pregnant or breast-feeding, ask health professional before use. Keep out of reach of children. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away. Other warnings: Do not use if carton is open or if foil seal under bottle cap printed safety seal is broken or missing.