We have a regularly recurring thread here that asks "What should I do to get my doctor to prescribe x?"
This study would seem to indicate that the best route is to tell him you have used x before and it worked well.
Something along the lines of "I know I am not supposed to do this but my buddy gave me some of his Adderall tabs and when I took them I really felt calm and focused..." might be just the ticket to your very own amphetamine script but it looks like this sort of line is more likely to work with your family doctor than with your psychiatrist.
