Warnings Liver warning: This product contains acetaminophen. Severe liver damage may occur if you take more than 4,000 mg of acetaminophen in 24 hours with other drugs containing acetaminophen 3 or more alcoholic drinks every day while using this product. 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 you are allergic to acetaminophen. Ask a doctor before use if you have liver disease. Ask a doctor or pharmacist before use if you are taking the blood thinning drug warfarin. Stop use and ask a doctor if new symptoms occur painful area is red or swollen fever pain gets worse or lasts for more than 10 days gets worse or lasts for more than 3 days These could be signs of a serious condition. Allergy alert: Acetaminophen may cause severe skin reactions. Symptoms may include: blistersrash skin reddening If a skin reaction occurs, stop use and seek medical help right away. Prompt medical attention is critical for adults as well as for children even if you do not notice any signs or symptoms. Caffeine warning: The recommended dose of this product contains about as much caffeine as a cup of coffee. Limit the use of caffeine-containing medications, foods, or beverages while taking this product because too much caffeine may cause nervousness, irritability, sleeplessness, and, occasionally, rapid heart beat. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of accidental overdose, get medical help or contact a Poison Control Center right away.