I took adderall for almost a year (under the direction of my GP), for what I thought might be ADD. It actually did almost nothing for me... Except each time we upped the dose, I got really dizzy for a day. Other than that, I felt no better able to concentrate, no better memory. I finally just stopped taking it because it was a pain in the assignment to get it each month, and it wasn't doing anything. The only effects of going off it was that my wife said I was kind of a jerk for a few days.