Ritalin and Adderall are poison, and basically turn your child into a zombie, and eventually, a druggie.
I do believe that there may be some chemical difference between an ADHD kid, and a "normal" kid. I tried Ritalin once, and I was speeding for an entire day. My stepson took it for years, and while on it he was actually slowed down, but then became moody and depressed later in the day.
If you want to hear the rest, FReepmail me. It's not pretty.