The public school system has become the legal "pushers" these days for these mind altering drugs. A child who needs attention is identified early on and can be recommended for behavior modification.
There is no need for "illegal" drug trade in this nation, the only thing stopping most from using prescribed drugs is the paper trail. However the "children" have no choice and their paper trail is begun in elementary school.
And when they become adults, and have this on their "permanent record" they will be unable to own guns legally.
The public schools and the big drug companies.
A prime example: http://www.adderallxr.com/