Sleepinal Night-Time Sleep Aid Maximum Strength CapsulesDiphenhydramine hydrochloride. Safe restful sleep. Contains the sleep-aid ingredient doctors recommend most. Non-habit forming. One capsule dosage. Wake up refreshed. In clinical studies, people who had difficulty falling asleep, fell asleep faster and got a restful night's sleep after taking the active ingredient in Sleepinal. Helps you fall asleep fast for a safe, restful sleep.