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).
Ritalin class-action lawsuits
The Ritalin class-action lawsuits were a series of federal lawsuits in 2000, filed in five separate US states. All five lawsuits were dismissed by the end of 2002. The lawsuits alleged that the makers of methylphenidate (brand name Ritalin) and the American Psychiatric Association had conspired to invent and promote the disorder ADHD to create a highly profitable market for the drug. The lawsuit also alleged that CHADD (children and adults with attention deficit/hyperactivity disorder) deliberately attempted to increase the supply of Ritalin and ease restrictions on the supply of Ritalin to help increase profits for Novartis.