insomnia
"I've used ambien for a couple months, probably 2 out of 3 days, and it works great.  It makes me able to fall asleep but doesn't knock me out.  It prevents me from waking up repeatedly for no reason, but I can still wake for a phone call.  I wake up in a shorter time feeling more refreshed than normal.  I didn't do anything funky in my sleep either (no strange women or empty fridges so far).  "