Ask a doctor or pharmacist before use if the user is taking the blood thinning drug warfarin. Do not use with any other drug containing acetaminophen (prescription or nonprescription). If you are not sure whether a drug contains acetaminophen, ask a doctor or pharmacist. if the user is allergic to acetaminophen or any of the inactive ingredients in this product. Liver warning: This product contains acetaminophen. Severe liver damage may occur if adult takes more than 4,000 mg of acetaminophen in 24 hours child takes more than 5 doses in 24 hours, which is the maximum daily amount taken with other drugs containing acetaminophen adult has 3 or more alcoholic drinks every day while using this product Allergy alert: Acetaminophen may cause severe skin reactions. Symptoms may include: skin reddening blisters rash If a skin reaction occurs, stop use and seek medical help right away. Stop use and ask a doctor if pain gets worse or lasts more than 10 days in adults pain gets worse or lasts more than 5 days in children under 12 years fever gets worse or lasts more than 3 days new symptoms occur redness or swelling is present These could be signs of a serious condition. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. Overdose warning: In case of overdose, get medical help or contact a Poison Control Center right away (1-800-222-1222). Quick medical attention is critical for adults as well as for children even if you do not notice any signs or symptoms. Ask a doctor before use if the user has liver disease.