insomnia
"I have been taking Ambien for almost 1 yr now and find it to work just well.  I sleep for almost 6 hrs but it takes almost 1- 1.5 hrs to kick in for me. I take it when in bed because once it's in and the effect takes in I fall right asleep and don't remember what time I fell asleep, I wake up right when my alarm goes off or if I need to use the restroom.  I don't wake up groggy and feel pretty great about my day, everyone I believe would like to sleep in more but 4-6hrs is good for me.  I have horrible insomnia which keeps me up all night until about 6-7 am then maybe fall asleep fr being a zombie.  Ambien definitely helps " me", but yes on a empty stomach is a must it else I can just say I wasted a pill.  Good luck with your experiences."