Given what I have heard about Ambien I half-wonder why they don't include an option to tether yourself to your bed with a timer - perhaps with an emergency release to trigger some sort of alarm in case - since either you are sleep wandering and possibly going to do something dangerous or there was a real emergency and you need to get out.

Maybe something combined with Life-Alert or On-Star to be sure that they are coherent if it is released to cancel an alert?