It doesn't stunt children's growth. Well, if you consider less than half a centimeter to be significant stunting (by the best estimates and most accurate measurements possible) then I can't argue with you. The belief that it causes significant growth impairment is based on very old and unreliable data. It doesn't affect the blood. Of all the drugs doctors prescribe, methylphenidate has been subject to more and longer study than almost any other, and is remarkably free of significant adverse effects. (Note that it's possible for any individual to have a serious or even fatal reaction to ANY medication, just as it's possible for the same thing to happen with almost ANY food or other substance. Water can kill you, in a number of different ways. But I still drink it.)   

I will try to find time this weekend to watch the video, and promise to keep an open mind.

Aloha,
Mark