Well, without viagra there may not be any kind of performance at all. So it is not performance enhacing, it is performance 100% of it... ehm... so I've heard...
I dunno If I just HAD to take speed, I would stick to crystal meth, You can do it a variety of ways, and unlike the makers of the energy drinks and the I guess FPS stuff, The speed manufacturers will tell you straight up that their crap will kill you. You just gotta like truth in advertising over spins and catch phrases.
And besides, I'd like to see someone smoke a Red Bull thru a light bulb.