3,4-Methylenedioxy-N-hydroxyamphetamine (MDOH, MDH, N-hydroxytenamphetamine) is an entactogen, psychedelic, and stimulant of the phenethylamine and amphetamine chemical classes. It is the N-hydroxy homologue of MDA, and the N-desmethyl homologue of MDHMA. MDOH was first synthesized and assayed by Alexander Shulgin.^[1] In his book PiHKAL (Phenethylamines i Have Known And Loved), Shulgin listed the dosage range as 100–160 mg, and the duration as approximately 3–6 hours.^[1] He describes MDOH as being very psychedelic and producing increased pleasure in beauty and nature.^[1] He also mentioned several negative side effects also seen with MDMA ("Ecstasy") such as difficulty urinating and internal dryness.^[1]