What is acetaminophen?

Acetaminophen (paracetamol) is an active ingredient in many medicines, including all TYLENOL® products and more than 600 over-the-counter (OTC) and prescription medicines. Acetaminophen (paracetamol) is thought to relieve mild to moderate pain by elevating your body’s overall pain threshold. It is also thought to lower your fever by helping your body eliminate excess heat. Products containing acetaminophen are available in many forms, including pills (caplets, tablets, and gelcaps) and liquids. Acetaminophen is also included along with other ingredients in combination medicines designed to treat symptoms of allergies, cold and flu, and pain with trouble sleeping. Do not take more than one product containing acetaminophen at the same time.