Methyl-DOB, or 4-bromo-2,5-dimethoxymethamphetamine, is a lesser-known psychedelic drug. It is similar in structure to DOB. Methyl-DOB was first synthesized by Alexander Shulgin. In his book PIHKAL (Phenethylamines I Have Known and Loved), the minimum dosage is listed as 8 mg, and the duration unknown. Methyl-DOB produces many physical effects, such as mydriasis and muscle tenseness, but few psychoactive effects. Very little data exists about the pharmacological properties, metabolism, and toxicity of Methyl-DOB.