insomnia
"First time I went on Ambien CR, I was disoriented and felt like I was having an out-of-body experience.  I was on it for 5 days.  I decided after trying several other medicines that I would try it again.  Now, I get 8 hrs asleep and I feel better now that I am getting to sleep.  Still am a little tired throughout the day but I don't feel insane from lack of sleep.  Definetly hooked on it because when I miss I know."