Everyone is certainly different; I know people on Adderall (or Vyvanse, which is similar) that have great outcomes, but Adderall gives me manic episodes, raises my resting heart rate by 20bpm, prevents me from sleeping, and causes mild hallucinations. I took it exactly once. Vyvanse had the same side-effects, but much milder and it lasted longer. I ended up on Focalin, which works and the only side effect is mild interference with my sleep.