Acetaminophen is used for the short-term relief of minor aches and pains due to colds, flu, headache, backache, arthritis, toothache, muscle pain, and menstruation. It also temporarily reduces fever. Outside of the United States, Canada, and Japan, acetaminophen is also called paracetamol. learn about acetaminophen side effects, liver damage, and autism risk Acetaminophen comes as a tablet, chewable tablet, capsule, suspension or solution (liquid), extended-release (long-acting) tablet, and orally disintegrating tablet (tablet that dissolves quickly in the mouth), to take by mouth, with or without food. WebMD looks at the serious risk of taking too much acetaminophen, which is found in Tylenol and other common medications. Acetaminophen may interfere with the results of some medical tests. Before you have any medical tests, tell the person in charge if you have taken acetaminophen within the past 3 or 4 days. You may also call the laboratory ahead of time to find out whether acetaminophen will cause a problem. Find patient medical information for Acetaminophen (Tylenol) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Pain Acetaminophen safety: Be cautious but not afraid Read labels and stick to guidelines to prevent this widely used pain and fever remedy from harming your liver. Detailed Acetaminophen dosage information for adults and children. Includes dosages for Pain and Fever; plus renal, liver and dialysis adjustments. Acetaminophen is a drug used in the treatment of mild pain, such as headache and pain in joints and muscles, and to reduce fever. Acetaminophen is the major metabolite of the chemicals acetanilide and phenacetin. Paracetamol, [a] or acetaminophen, [b] is an analgesic and antipyretic agent used to treat fever and mild to moderate pain. [14][15] It is a widely available over-the-counter drug sold generically or under various brand names, including Tylenol and Panadol. Paracetamol relieves pain in both acute mild migraine and episodic tension headache. [16][17] The aspirin/paracetamol/caffeine combination. What is Acetaminophen? Acetaminophen is a drug that is used to: Temporarily relieve pain Temporarily reduce fever Acetaminophen is found in hundreds of over-the-counter and prescription drugs. It.