Rainbow fentanyl: the new tactic of cartels in Mexico to promote the deadly opioid to kidsAugust 31, 2022Ian Hayden ParkerMoreThe United States Drug Control Administration ( DEA ) detected rainbow fentanyl, a black market drug to promote the deadly synthetic opioid as sweets, whose distribution points to the Sinaloa Cartel and the Jalisco Nueva Generación Cartel (CJNG).