Attention deficit hyperactivity disorder management
There are two major medications derived from methylphenidate's isomers: a racemic mixture of half d-threo-methylphenidate and half l-threo-methylphenidate called methylphenidate (Ritalin, Concerta), and an enantiopure formulation containing just d-threo-methylphenidate called dexmethylphenidate (Focalin).
Timmy 2000
The other boys have actually started to take their Ritalin medication, making them very calm and rather boring. Cartman develops a side effect from Ritalin that causes him to see pink Christina Aguilera monsters (one of which causes him to accidentally kill Kenny). The adults are uncomfortable among them, but accept their new kind and obedient children when they also start taking Ritalin. Chef and the pharmacists are the only people left who are not under the drug's influence.