I got two 30 mg adderall xr pills for some one...my Q's are 1. should I just take one, or do you think I should take 2? 2. what are the effects like? 3. should I snort it of just take it? if you say snort it, how would I go abut doing it, I never snorted any thing... 4. is there a difference in the effects, if you snort it, instead of just taking it. 5. how long do the effects last, and do they last different amounts of time if you snort it as apposed to just taking it? and how long do they take to start... 6. do you think people would be able to tell I'm on it? I was thinking of trying it for the first time on Monday before school... 7. and what does the XR mean?