What do Tylenol products treat? Tylenol products are medicines you can buy without a prescription (over-the-counter or OTC) to treat pain (including arthritis pain), headache, and fever. Tylenol (acetaminophen) is an over-the-counter pain reliever and fever reducer used for headache, muscle aches, backache, arthritis, toothache, sore throat, menstrual cramps, colds, and flu. Acetaminophen is generally a safe and effective pain reliever, but it can can lead to serious side effects and liver damage if you take too much or have certain health conditions. Learn who should avoid Tylenol (acetaminophen). Learn about the side effects of Tylenol (acetaminophen), from common to rare, for consumers and healthcare professionals. Acetaminophen (Tylenol) is an over-the-counter (OTC) analgesic used for pain relief and to reduce fever in adults and children. It comes in many forms, including tablets, capsules, chewable tablets, liquids, powders, and suppositories. Your dose depends on your age and the product you take. Side effects are rare when taken as directed, but could include nausea and headache. Taking too much. Tylenol is a brand of medication, advertised for reducing pain, reducing fever, and relieving the symptoms of allergies, cold, cough, headache, and influenza. An active ingredient in these medications is acetaminophen (paracetamol), an analgesic and antipyretic, although other ingredients with significant effects (such as codeine, caffeine or diphenhydramine) are included in some variants. Get safe TYLENOL® dosing guidance for adults and children. Learn about recommended TYLENOL® dosages, how to read dosing charts, and how to use acetaminophen safely. Find patient medical information for Acetaminophen (Tylenol) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Discover how TYLENOL® pain relieving products & medicine can help you and your family feel better. Learn about symptoms, treatments, dosages and product info. Liver damage can occur if large amounts of acetaminophen are taken for a long time. If you are taking this medicine without the advice of your doctor, carefully read the package label and follow the dosing instructions. Talk to your doctor if you have any questions.