Ask a doctor before use if you have liver disease glaucoma a breathing problem such as emphysema or chronic bronchitis trouble urinating due to an enlarged prostate gland ask a doctor or pharmacist before use if you are taking the blood thinning drug warfarin taking sedatives or tranquilizers when using this product drowsiness will occur avoid alcoholic beverages do not drive a motor vehicle or operate machinery. Stop use and ask a doctor if sleeplessness persists continuously for more than 2 weeks. Insomnia may be a symptom of a serious underlying medical illness.new symptoms occur redness or swelling is present pain gets worse or lasts more than 10 days fever gets worse or lasts more than 3 days 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: taking more than the recommended dose (overdose) may cause liver damage. In case of overdose, get medical help or contact a poison control center (1-800-222-1222) right away. Quick medical attention is critical for adults as well as for children even if you do not notice any signs or symptoms. 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.with any other product containing diphenhydramine. Even one used on skin in children under 12 years of age if you are allergic to acetaminophen or any of the inactive ingredients in this product.