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).
Stimulant
Methylphenidate is sold in many forms, its most common trade name is the oral tablet Ritalin. Other versions include the long lasting tablet Concerta and the long lasting transdermal patch Daytrana.