EDMA, or 3,4-ethylenedioxy-N-methylamphetamine, is a lesser-known psychedelic drug and a substituted amphetamine. EDMA was first synthesized by Alexander Shulgin. In his book PiHKAL (Phenethylamines i Have Known And Loved), the minimum dosage is listed as 200mg, and the duration listed as 3-5 hours. EDMA produces hypnogogic imagery and empathogenic, non-psychedelic MDMA-like effects. It generally has a threshold, and no other effects. Very little data exists about the pharmacological properties, metabolism, and toxicity of EDMA.