Not by design - but it'll probably do the job. It's a synthetic opioid, used in hospitals for pain relief. Said to be stronger than heroin - and addictive as any opioid. Popular and widely sold to addicts. Unpredictable and overdose stats are going through the roof. Many deaths. Also carfentanil - 10,000 times stronger than morphine. A lot of that is manufactured (cheaply) in China and smuggled into US by criminals... I've heard that some unscrupulous suppliers in China are willing to break carfentanil shipments to US into small packages to be below the radar for postal inspection etc. It's apparently legal to manufacture & sell in China and some have been very open in their offers to do this. J.