"i&#039;ve been taking zolpidem now for a year, always get a good night&#039;s sleep. those of you who take the controlled release have problems because that&#039;s the one with slow release, not good, i also break pills in half or quarters, something you can&#039;t do with slow release cr either. cr makes you wake during the night and causes all sorts of problems, sleepwalking, etc. take instant release zolpidem, see the difference."