Acetaminophen is generally a safe and effective pain reliever, but it can can lead to serious side effects and liver damage ...

Do not use with any other drug containing acetaminophen without asking your ... with certain medical/lab tests (such as urine 5-HIAA, allergy skin tests), possibly causing false test results.

One ingredient in this product is acetaminophen. Taking too much acetaminophen ... tell your doctor or pharmacist if you are allergic to any of its ingredients; or if you have any other allergies.