Sleep better with Advil® PM. Advil PM helps you fall asleep faster and stay asleep longer. Don't let backache, minor arthritis pain, joint pain, or other minor nighttime aches and pains interrupt a restful night's sleep. Sleep is your body's natural way to revitalize and recover from the wear and tear of the day. If pain is keeping you awake, try Advil PM for unsurpassed nighttime pain relief. The active ingredients in Advil PM Caplets include 200 milligrams of ibuprofen (an NSAID) and 38 milligrams of diphenhydramine citrate.