Tylenol 8 Hour Muscle Aches & Pains is designed to work fast and last long for effective muscle, joint and body pain relief. Each extended-release tablet contains 650 milligrams of acetaminophen and features two unique layers ? the first is fast-acting and the second is long-lasting ? for pain relief that works as hard as you do. This effective oral pain reliever is gentle on your stomach, but tough on body pain for relief of minor joint and muscle aches. Made by the #1 doctor recommended brand of pain reliever, it also works as a fever reducer and can be used by adults and children 12 years of age and older. Tylenol 8 Hour Muscle Aches & Pains is safe when used as directed so you can take control of muscle pain and take back your day.