Or put another way - Do you really want to give your developing children amphetamines (which is what Ritalin is) to cure a phony disease?
Hyperactivity in children is only a bad thing when it's caused by artificial stimulation like a sugary junk food diet, too much time in front of the TV and movies and not enough exposure to exercise and the outdoors.
Yes - you can give them speed to deaden them from their normal childhood impulses while pumping them full of artifical food and artificial reality (TV). But you'll be the one that has to answer for that decision some day - I guarantee it.