Meta-DOB, or 5- bromo-2,4-di methoxy amphetamine, 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 50–100 mg, 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.