Is this a one-time thing that you want to do, or do you plan on cramming a lot? A lot of kids abuse Adderall and get results, but it also makes you super depressed afterwards. I saw a news segment where kids were sniffing it - super cram overnight, forget it all after the test, be uber depressed for the rest of the week haha. It boils down to passing the exam & abusing your body, or spending time actually learning something. Do you have trouble studying? If so, we can make some recommendations for that. Magic pills don't actually help you learn anything permanently.