Ritalin is a Cocaine like, hard drug, used to treat the so-called problem of Attention-Deficit-Hyperactivity-Disorder (ADHD). The true reason for it's use is to dumb down and pacify intelligent active boys and some girls, so that they will not cause problems for their teachers, when they are placed in the anti-boy environment called school!
If it were true that so-called ADHD children had a biologically caused attention deficit then they would not be able to do any task requiring intense concentration. Specifically, they would not be able to play video games, because of the concentration required!
But so-called ADHD boys are avid players of video games, and concentrate so well that it is very difficult to pry such a boy from his game!
Therefore, ADHD does not exist, but is just an excuse to discriminate against boys and some active girls, and drug them with the very hard drug: Ritalin (Methylphenidate)!
Ritalin and Cocaine are both dopamine reuptake inhibitors, however Ritalin is about twice a strong as Cocaine, and the effect lasts much longer. Try searching Google using the search term: Methylphenidate Cocaine.
Anyone who would give such drugs to kids belongs in jail, except giving Ritalin to kids should carry double the jail term as pushing Cocaine to kids now does!