One ADHD drug, Desoxyn is methamphetamine.
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.