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