Diphenhydramine
"My doctor had prescribed Ambien.  Before taking it, I wanted to know side-effects.  Found that it can have very negative unwanted side-effects.  Therefore, did NOT even take one tablet.  Threw them out!  So, I turned to the Equate Nighttime Sleep aid, 50mg., which was a good choice.  Help me to sleep well.  I do, though, awake although briefly around 2:30-3:00 AM after having gong to bed at 9:00 PM.  Notice some daytime sleepiness at times."