That's Rohypnol, right? As far as I know, it's mainly meant as a sleep-inducer, and an infamously strong one at that. I've never taken it, but nothing I've heard about it has ever made me think it could at all be used functionally to get you high, or even just to reduce anxiety. Unless we're talking about microdosing? Even then, why not pick a benzo with a better track record and that's less difficult to dose correctly for the effects you're looking for? It's not like there's a lack of them out there.