All

From wikipedia Adderall Performance enhancing [i]Therapeutic doses of amphetamine improve cortical network efficiency, resulting in higher performance on working memory tests in all individuals.[11][40] Amphetamine and other ADHD stimulants also improve task saliency (motivation to perform a task) and increase arousal (wakefulness), in turn promoting goal-directed behavior.[11][41][42] Stimulants such as amphetamine can improve performance on difficult and boring tasks[11][41] and are used by some students as a study and test-taking aid.[43] Based upon studies of self-reported illicit stimulant use, students primarily use stimulants such as amphetamine for performance enhancement rather than abusing them as recreational drugs.[44] However, high amphetamine doses...

Seem like the stuff is a PED [i]Although it might not sound like a big deal, Ruiz being allowed to take Adderall could turn out to be huge. In the season before his suspension, Ruiz batted .325 while hitting 16 home runs and knocking in 68 runs -- all career highs for the catcher. After being suspended, and not being able to take Adderall, Ruiz performance clearly suffered. In a career-low 92 games, Ruiz hit just five home runs to go along with 37 RBIs and a .268 hitting average. Although the drop in performance can't be directly tied to...