The illicit drug market is facing a dangerous new shift as Medetomidine, a potent veterinary sedative, is now frequently replacing Xylazine in street drugs. This combination, primarily mixed with fentanyl, dramatically increases the risk of overdose, complicates emergency reversals, and poses severe challenges to public health officials who must adapt quickly to this evolving and deadly crisis. Story Highlights Medetomidine, a potent animal sedative, replaces xylazine in street drugs. The shift exacerbates fentanyl overdoses, complicating reversals and withdrawals. Enforcement pressures lead traffickers to find new, deadlier drug combinations. Public health specialists warn of unpredictable consequences. Medetomidine’s Rise in the Illicit...