insomnia
"I went from working nights (3:30pm-12:00am) to working 7am-3:30. I would keep thinking all night and I couldn't shut my brain off. I have always had problems with insomnia, so much so that some times I would stay up for days at a time. I was prescribed Ambien by my doctor and I started taking it at night. It worked. The first time I took it I started hallucinating. I saw two of everything and I couldn't hold my head up. I woke up and felt fine. So I kept taking it. Slowly I started getting very sad as I woke up.  I thought about doing terrible things to myself. After being awake for a couple hours I was fine. This drug made me very depressed. I never abused this medication. I was very careful. Effects are different for everyone."