M.B.
I would highly recommend you check out the Block Center:
www.blockcenter.com
Dr. Block is world reknowned for being able to treat this condition without drugs as she finds the culprit is often hidden food allergens, such as gluten (the protein found in wheat, rye, oats and barley) and casein (the protein found in dairy). I and my younger son are both ADHD and our symptoms have improved alot on the GF/CF diet. You might find this checklist (although oriented to kids interesting):
http://www.blockcenter.com/ADD_ADHD/ADHD_Misdiagnosis_Che...