Princeton is awesome. Unfortunately they are biased against the ACT (I think it has somethin to do with that scam of a college board being based in Princeton, NJ) so I really, really advise you to take both the SAT and the ACT. They prefer the SAT but I got in with a mediocre SAT a really high ACT. As far as the adderall goes I can't really provide help there but if you think itll help you by all means go for it...you can always take the ACT again. Also if you think Princeton is your absolute top choice you really should apply early decision, because it vastly improves your chances. The creative writing at Princeton is awesome, and the entire arts program just got a $101 million donation to expand. Good luck, and Stanford sucks.