O-DSMT Pellets 30mg O-DSMT PELLET INFORMATION O-Desmethyltramadol (also known as O-DSMT and desmetramadol) is an opioid substance of the cyclohexanol class. It is an active metabolite of tramadol and should only be used for research purposes. EFFECTS O-DSMT (PELLETS euphoric calming narcotic...