That, used to be a long standing taboo in the history of the drug trade in the west, now it's gone obviously, something has changed... To lace a drug with X or Y to gain some volume/weight yeah that was a thing, always has been among retailers, but mixing different dopes not so much, especially when one is potentially lethal... That used to be considered "bad practice". It doesn't attract the same kind of cops/attention for a start in case of fuck ups and let's face it many retailers also happen to be casual consumers... This comes to mind https://poal.co/s/CartelWatch/674208 >>Crime group yields to intensifying U.S. law-enforcement pressure and is kidnapping or killing producers who defy its ban on trafficking the opioid CULIACÁN, Mexico—The Sinaloa cartel, the leading exporter of fentanyl to the U.S., is prohibiting the production and trafficking of the illegal opioid in its territory after coming under increasing pressure from U.S. law enforcement, cartel members say. The order comes from the “Chapitos,” the group led by the four sons of imprisoned drug lord Joaquín “El Chapo” Guzmán, who transformed the Sinaloa cartel into a global empire managing the supply of narcotics, from Mexican heroin to Colombian cocaine and fentanyl made with precursors from Asia. The directive from the most powerful faction within the criminal group aims to evade pressure from U.S. law enforcement, operatives say, though some U.S. officials are skeptical that the ban will endure.