Meta-DOB, or 5-bromo-2,4-dimethoxyamphetamine, is a lesser-known psychedelic drug. It is similar in structure to DOB. Meta-DOB was first synthesized by Alexander Shulgin. In his book PIHKAL (Phenethylamines I Have Known and Loved), the dosage range is listed as 5-100 mgs, and the duration listed as 5-6 hours. Meta-DOB produces few to no effects. Very little data exists about the pharmacological properties, metabolism, and toxicity of Meta-DOB.