O-Desmethyltramadol (O-DSMT) is an opioid that has primarily been used indirectly due to it being a primary metabolite of the analgesic tramadol. Since the 2010s it has occasionally been used on its own as it has been sold through the grey market/research chemical market.
Penta-Fentanyl online is a known opioid analgesic available in form of powder and crystals, a Fentanyl analog with a full chemical name N-(1-phenethylpiperidin-4-yl)-N-phenylpentanamide. According to the latest researches and trials, Penta-Fentanyl is the drug that is 5-15 times stronger than another popular chemical – heroin. A more surprising fact is that it is nearly 15 times less potent than Fentanyl, yet 80 times stronger than morphine.