> It’s more expensive and has the opposite effect.
Nonsense, fentanyl is waaay cheaper than coke or heroin or any other street drug, like nearly an order of magnitude more per dollar when buying dealer-level quantities. The depressant/stimulant effect stuff is somewhat true, but different people are effected differently by different drugs, most people aren't drug connoisseurs, and a large part of the high is psychosomatic, so experienced and knowledgeable people might have some idea of the purity but it won't really stop others from buying.
Nonsense, fentanyl is waaay cheaper than coke or heroin or any other street drug, like nearly an order of magnitude more per dollar when buying dealer-level quantities. The depressant/stimulant effect stuff is somewhat true, but different people are effected differently by different drugs, most people aren't drug connoisseurs, and a large part of the high is psychosomatic, so experienced and knowledgeable people might have some idea of the purity but it won't really stop others from buying.