insomnia
"I have been taking Ambien for several years, and recently started taking Ambien CR.  It works very well, if taken on an empty stomach.  However, I was having only mild sleep difficulty when my doctor prescribed it.  I have tried other sleep medicines, Ambien is one of the strongest prescription insomnia drugs available.  I highly recommend trying something with less side effects first, and only if absolutely necessary, try Ambien.  Ambien is very difficult to discontinue after extended use."