Tylenol Pain Reliever/Fever Reducer, 8 Hr, 650 mg, Caplets

Contains acetaminophen extended release. For up to 8 hour relief of minor muscle aches & pain. Capsule-shaped bi-layer tablets. Contains no aspirin. What makes Tylenol 8 Hr Muscle Aches & Pain bi-layer caplets different? Uses a bi-layer caplet. The first layer dissolves quickly to provide prompt relief while the second layer is time released to provide up to 8 hours of relief.