I once tried cocaine before hitting the weights and all I could do was talk, talk, talk to every one at the gym. I used no periods, no pauses, I spoke in paragraphs instead of short sentences. I would ask a quesion and not let the person answer, I'd answer for him/her. I was just a chatterbox for about 4 straight hours...I guess I talked my ass off and never touched a dumbell. So my recommendation don't do it ! Better yet, stick to an E/C/A stack.
(sorry it's just weird to see a thread like this about cocaine?? in a bodybuilding/fitness forum!!)