Or how the meds work on someone with ADD
as compared to a person without ADD
If so more info is needed. First everybody reacts a little bit differently to the meds. But there are a variety of meds out there in both the stimulant and non stimulant form and they all do things a bit differently. I can give you a site that covers all of them, but its kind of technical.
So if you can be a bit more specific, perhaps I can direct you to a place with the info you want.