Kind of depends on tolerance, I think. I've swallowed a full script of Ambien in one day numerous times, but I learned 3 10mg tablets is the threshold for me between staying in reality or heading off to fantasy land where I lose control.
1mg Xanax on top of 5 Ambien..hmm doesn't sound like a death wish to me as far as putting to many drugs in your body.....It's just what you do once it all takes effect, because benzos and Ambien are both well known for effecting your memory.
Zopiclone sucks ass. It's like a poor man's Ambien. It smells like shit, it tastes like shit, and it'll black you out a little, but not like the full on approach Ambien has. One thing about it is that it's marketed to last longer (if you have problems staying asleep)..It does that..kind of. I wouldn't touch it again. Get temazepam instead.