If you take the Ambien ( which is rx in the US) - be aware that it will knock you out really fast. When I had it for a week for insomnia - my husband would walk in and find me asleep at the computer. The best thing is that there was for me , anyway, no hangover effect. It would give me a solid 6-8 hrs of sleep - but once I woke up - I was up - unlike muscle relaxers.

Also - roofies - are big time illegal in the US