O-Desmethyltramadol (O-DSMT) is an opioid analgesic and an active metabolite ,It has little to no history of human usage but is easily accessible through the use of certain online research chemical vendors. In comparison to tramadol, O-DSMT lacks any stimulation and feels considerably closer to that of a traditional opiate. It is also stronger in terms of its potency and has a significantly shorter duration.:
Legal status in US: Not explicitly controlled at Federal level, though this chemical may be deemed a controlled substance of cat under the Federal Act under certain circumstances. Legality under state law will vary depending on the specific legislation enacted in each US state.