does anyone have any info on this? or could point me in the right direction?

my pdoc wants me to try this, to help with my energy. he keeps asking me if i've had a chance to read up on it yet and make up my mind. i'm easy to try it, but he really sounds like he won't give it to me until i've done a bit of research (bless).

so does anyone know where i can start looking? i'm at a bit of a loss because i don't think it's called the same in the states, and all the info in australia seems to be on its use in ADHD.