Methylphenidate
"I've started taking Concerta because of ADD when I was 21. I went to see my doctor, I was explaining to him that I had difficulty keeping up at school since I was a kid, but the only reason I'm in University was because I was in art school. He prescribed me concerta. If anyone took speed before, it's exactly the same effect. You do get a down. You are more focused. You loose weight. However, you can go to sleep at night. The problem is, I don't take it everyday, I think it's a little bit too harsh for me. I'll go see him again, maybe I have psychological issues.
It DID help with my sleeping: I always fell asleep in the afternoon, it took everything I had to stay awake ( at school, at home, at friends house) I was known as the sleeper."