Tylenol 8 Hour Muscle Aches & Pain Acetaminophen Tablets are designed to work fast and last long for effective minor muscle and joint pain relief. Each extended-release tablet contains 650 milligrams of acetaminophen and features two unique layers - the first layer of the bi-layer design delivers fast-acting medicine for quick relief while the second has an extended release, offering effective pain relief that lasts up to 8 hours - for pain relief that works as hard as you do. This effective oral pain reliever medicine is gentle on your stomach, but relieves minor joint and muscle aches, back pain, minor arthritis pain, and minor aches and pains due to the common cold. Made by the #1 doctor recommended brand for pain relief and fever reduction, 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.