I've heard there's some differences in the effect between regular Ambien & Ambien CR, but I don't know how true it is.
I've been on Ambien CR for probably a couple years now, on the 12.5 mg dose & at this point I'll be happy to stay on it forever. I used to dread going to bed at night because I knew I'd be tossing & turning, and if I did finally fall asleep, every little noise or movement by DH would wake me up. And then I'd have a hard time falling back asleep again!
It doesn't hit me very fast--once I take it, I know I've got about an hour before I feel it working so I take that time to do my bedtime routine, etc. But I do know that anything that happens after about a half-hour, I'll most likely forget. I've noticed that especially when I've turned my Kindle on the next day, only to find I couldn't remember reading the last 10-15 pages or so.

Obviously I still haven't learned my lesson about reading after taking the Ambien!
When I've needed to wake up in the middle of the night, I've done so with no problems; the only difference being, I'm able to fall back asleep again quickly, which is something I'd never been able to do before. I do definitely need at least 8-9 hours of sleep though because I'll be a bit groggy by mid-afternoon otherwise, but that's just been a matter of adjusting when I need to take it & that's worked out fine for me.
I apologize for the novel, but I did want to give a positive post about it. I'd give it a chance but if you do feel any negative effects, do call your doctor.
Good luck.
