Sleepwalking and other strange behaviours have been linked to sleep meds. Imovane (Zopiclone) and Ambien in particular. It's rare, but people have been found driving. One lady who is an expert in some sleep disorders was taking it and fell down stairs breaking several bones.

http://www.cbc.ca/news/health/story/...g-warning.html

To me the potential risk is worth the immediate results. I went for six months never getting more than 4 hours of continuous sleep. . . then became what my doctor called dysphoric mania or something along those lines. So wired, with so many racing thoughts, but overwhelmed, crying at every turn. . .

She put me on Seroquel because Imovane doesn't work anymore. I'll take my chances with what might happen later. . . later.