Ambien is a hypnotic sedative similar to benzos that is prescribed for sleep - generally 1 hour before bedtime. There have been MANY reports of strange things with ambien (Ihave been precribed it) - sleep eating with no recollection, sleep DRIVING with no memory - and I could go on. Benadryl is a basic antihystamine type thing that is also used for sleep - If you are having probs it is probably the ambien (or mix?) but you dont say what the probs are. More info would help advice.