Nothing says Halloween like candy corn, carved pumpkins, and children dressed up in costumes to go trick-or-treating. But this Halloween, parents will unfortunately face something much more haunting than ghosts — fentanyl disguised as candy.

Since August 2022, the Drug Enforcement Administration and its law enforcement partners have found brightly colored fentanyl and fentanyl pills, nicknamed “rainbow fentanyl,” in 26 states. According to the DEA, “this trend appears to be a new method used by drug cartels to sell highly addictive and potentially deadly fentanyl made to look like candy to children and young people.” The DEA has already seized more than 10.2 million fentanyl pills and 980 pounds of fentanyl powder from May through September of this year— the equivalent of 36 million lethal doses. And that was before “rainbow fentanyl” hit the market.