DOBU, or 2,5-dimethoxy-4-(n)-butylamphetamine, is a lesser-known psychedelic drug and a substituted Amphetamine. DOBU was first synthesized by Alexander Shulgin. In his book PiHKAL (Phenethylamines i Have Known And Loved), neither the dosage nor the duration are known; the duration is simply listed as "very long". DOBU produces paresthesia and difficulty sleeping. Very little data exists about the pharmacological properties, metabolism, and toxicity of DOBU.