KD, if you're consistent with the token economy it can work really well. It makes the child so much more conscious of when they've done something good or bad, and eliminates a lot of yelling (turns it into a financial transaction). The tricky bit is keeping track-- but I think it's worth the effort.

Meds can really change how ADHD presents-- I don't know if you're considering that, but it is helpful to a lot of people.

Kudos to you for figuring out your DS's needs--
DeeDee