It is a sound practice to look up interactions on the internet whenever you are prescribed a new medicine. I do this religiously and you would be surprised how often doctors have prescribed medications that interact with each other. I would say this happens more often than not. The problem usually arises when a specialist prescribes for a condition outside his speciality.
Quick thought cause I need to find where I saw the info. But I know that some anxiety meds can partially damp the effects of stim meds. For example, "Wellbutrin can block the pathway for Dex, only moderate, but if the person is s slow burner that moderate blockage of 2D6 could spell the difference." If you don't mind me asking, what anxiety meds are you on and I will see if that effects the stim med.
Oh, the other more important question is - does the adderal make you sleepy? Or basically does it just not affect you. There is a huge differance between the two affects.
Found it. ": Prozac and Paxil both significantly block the pathway for the metabolism of Adderall and all the amphetamine products. So if you are using either of these two with adderall - that could be part of the problem.
The link is here - http://www.corepsychblog.com/2006/11/adderall-prozac-and-paxil-problem-not-solution/
Hope some of this might be helpful in explaining to your doc what is going on. I may also have some stuff on common adult requirements for XR- I'll keep looking. Best wishes.