Tylenol is a popular American brand of drugs for relieving pain, reducing fever, and relieving the symptoms of allergies, cold, cough, and the flu. The active ingredient of its original, flagship product, acetaminophen (called "paracetamol" outside of North America), is marketed for headaches, fever, muscle and body pain, arthritis, and joint pain. Like the words "acetaminophen" and "paracetamol", the brand name is derived from the chemical name for the compound, N-acetyl-para-aminophenol (APAP). It is available over the counter without prescription, has few side effects, and reacts with very few medications. However, it can have fatal interactions with alcohol. In addition to products related to allergies and cold, Johnson & Johnson also sells a stronger pain reliever containing codeine.