• blisters. • you develop a rash or joint pain. • you need to take this product for more than 14 days. • rash. • you need to take more than 1 course of treatment every 4 months. STOP USE AND ASK A DOCTOR IF:. • your heartburn continues or worsens. • nausea or vomiting. KEEP OUT OF REACH OF CHILDREN. In case of overdose, get medical help or contact a Poison Control Center right away. • stomach pain. ASK A DOCTOR BEFORE USE IF YOU HAVE:. • heartburn with LIGHTHEADEDNESS, SWEATING OR DIZZINESS. • skin reddening. These may be signs of a serious condition. See your doctor. DO NOT USE IF YOU HAVE:. • frequent wheezing, particularly with heartburn. • Do not use if you are allergic to omeprazole. ALLERGY ALERT:. • you get diarrhea. IF PREGNANT OR BREAST-FEEDING, ask a health professional before use. • unexplained weight loss. • Omeprazole may cause severe skin reactions. Symptoms may include:. • had heartburn over 3 months. This may be a sign of a more serious condition. • frequent CHEST PAIN. WARNINGS:. If an allergic reaction occurs, stop use and seek medical help right away. • trouble or pain swallowing food, vomiting with blood, or bloody or black stools. • chest pain or shoulder pain with shortness of breath; sweating; pain spreading to arms, neck or shoulders; or lightheadedness. ASK A DOCTOR OR PHARMACIST BEFORE USE IF YOU ARE taking a prescription drug. SAFETY FEATURE - DO NOT USE IF TABLET BLISTER UNIT IS OPEN OR TORN. Acid reducers may interact with certain prescription drugs.