Rule out any other things whose symptoms may be manifesting themselves as ADHD behaviors to determine if it is in fact ADHD; there are numerous things that can come across as ADHD (pyroluria, candida (yeast) overgrowth, zinc/copper imbalances, hypo/hyperglycemia, under/over methylation, auditory issues, vision problems, nutritional deficiencies, etc.). Remove all artificial colors, flavorings, preservatives from the diet. Lots of kids benefit from the Feingold diet. Investigate cerebral allergies (delayed food hypersensitivities to things like gluten, casein, soy, corn, etc.) to see if they are impacting your child.
I was able to rid my son of his diagnosis using a biomedical approach. If you have access to a DAN! doctor, go for it, as they are much better able to treat your child than mainstream doctors who will only suggest stimulant medication and therapy. Good luck.
at 7:36 AM on Aug. 1, 2010