In addition to relieving mild aches and pains, Tylenol PM Extra Strength Nighttime Pain Reliever and Sleep Aid Caplets help you fall asleep quickly and get a better night's sleep. Each caplet of this medication for pain treatment at night contains 500 mg of acetaminophen and 25 mg of diphenhydramine hydrochloride. It is designed to help you fall asleep and remain asleep while also treating headaches and mild aches and pains. It is a pain reliever and non-habit forming sleep aid. When used as prescribed, this nonhabit-forming medication—which is safe for both adults and children 12 years of age and older—comes from Tylenol, the #1 brand that doctors recommend for pain relief and fever control.