L.M.
Try a hypoglycemic diet - it eliminates most sugars....my daughter has been eating that way now for a few yrs - sometimes it's hard - she gets frustrated...but WELL worth it! She now is an A & B student - when before we struggled just to pass. We saw a Dr in Plano that came highly recommended...and worked hard to help us - he did brain scan and actually found that the ADHD meds were not working for her!!!!! That's when we found out she was hypo-glycemic! Not saying she is not adhd any longer....the diet did it though!
Good Luck! We also worked with a gal in Grapevine that does cognitive lessons - teaching kids how to work without meds....we are very big on that!