If pregnant or breast-feeding - ask a health professional before use. Allergy alert: do not use if you are allergic to famotidine or other acid reducers. Stop use and ask a doctor if - your heartburn continues or worsens , you ned to take this product for more than 14 days. Allergy alerts: do not use if you are allergic to famotidine or 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, frequently chest pain, frequently wheezing, particularly with heartburn, unexplained or vomiting, stomach pain. 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, with other acid reduceers. Keep out of reach of children - in case of overdose, get medical help or contact a poison control center right away.