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).
Metaescaline
Metaescaline, or 3,4-dimethoxy-5-ethoxyphenethylamine, is a lesser-known psychedelic drug. It is an analog of mescaline. Metaescaline was first synthesized by Alexander Shulgin. In his book "PiHKAL (Phenethylamines i Have Known And Loved)", the dosage range is listed as 200–350 mg, and the duration listed as 8–12 hours. Metaescaline produces mental insights, entactogenic, MDMA-like effects, and TOMSO-like activation. Very little data exists about the pharmacological properties, metabolism, and toxicity of metaescaline.