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 first class action was filed in Texas by the law firm Waters & Kraus in 2000. They created a webpage called Ritalinfraud.com which had an online form to seek additional participants in class action lawsuits. According to Breggin, plaintiff Andy Waters had previously read his book "Talking back to Ritalin" before filing his lawsuit. The firm believed that the improper conduct of Novartis rivaled the improper conduct of the tobacco and asbestos industries and that the drug company could be liable for billions of dollars. The firm claimed that Novartis specifically took the following steps to dramatically increase the sale of Ritalin.A spokesperson for Novartis responded to the Texas suit, "Ritalin has been used safely and effectively in the treatment of millions of ADHD patients for over 40 years, and is the most studied drug prescribed for the disorder."