My DD was diagnosed when she was 6 and meds made a big difference for her. She went from doing almost nothing in first grade to actually completing work and making good progress. We had to play around with the meds a lot. Concerta worked well for her but wore off rather quickly and she was moody as it wore off. Tenex turned her into a sedated, unfocused zombie. Adderall made her very crabby, hypersensitive, and also wore off quickly, like the Concerta (even the extended release stuff). She is on a Daytrana patch now combined with short acting ritalin just in the morning (as we wait for the patch to kick in--it takes a few hours), and that is working the best for her. Only problem is that she has NO appetite until about 7 pm. Good luck!