insomnia
"I have been on Ambien for about 8 months but I had started to become tolerant to it.  Sometimes I would take it and it would knock me out other times I can take it and still be wide awake until 4am.  My doctor recommended that I try Ambien CR but my insurance won't approve it until I've tried Lunesta.  WHAT A WASTE OF TIME!!  It literally had no effect on me whatsoever.  Tylenol PM would have done a better job!  I followed the instructions to the tee, didn't eat a fatty meal and took it on an empty stomach.  Has anyone else had this result?  I need to switch back to Ambien!"