insomnia
"The thing I love most about Ambien is that I can still wake up and function if I need to, and then fall back to sleep.  I have three kids, and if one of them wants a glass of water in the middle of the night or falls out of bed, I'm perfectly functional to take care of them, even on Ambien.  I sleep great now, but everyone should try to wait until they get into the bed prior to taking the pill. Fortunately, my worst Ambien-induced amnesia stories are waking up and thinking "I wonder who did the dishes?""