i would say from my experience...i had very good results at the begining, then i started feeling i needed more, like the initial dose wasn't enough anymore, after they upped my dose i started feeling like crap, so my advice to you would be try to stay on the lowest dose possible, because too much gave me problems..i am not on extended release, so i take it 2 times a day, the higher my dose, the worse was the "coming down" (adderall is a stimulant) when my med. would ware off i would get a real lousy depressed feeling and also extreme fatigue. smaller dosage helps. i believe i never needed a higher dose in the first place, but you can get a tolerance fairly quickly. i was also only diagnosed a year ago after going back to school. i only take the adderall on the weekdays(for school) and skip on the weekends, that helps alot with the tollerance issue. and i have cut myself back to half what i was started on (10mg like you-- i was started on 20mg which i think was too much) if you maintain a balance, just enough to help, but not too much, adderall can be really helpful

this is my experience and everyone is not the same, just thought i would share. take care