I'm sorry, but I don't even see the point in a date rape drug, or for that matter, the idea of getting a woman so drunk that she passes out. How much fun could it possibly be having sex with a motionless lump. No way. If my partner isn't enjoying things too, it's not a lot fun for me. Sex, most of the time, means two (or more) people participating. Not one working it while the other snores. Please.
Take care,
~Chris