New Super-Opioid Cyhlorphine Kills 7 in Cook County

A dangerous synthetic opioid called cychlorphine has emerged as a significant threat, contributing to seven overdose deaths in Cook County just halfway through 2026. This drug, described as up to 10 times stronger than fentanyl, was first identified by the DEA in 2024 and registered in toxicology reports last year. It is frequently being mixed into other illicit drugs without the knowledge of purchasers.

DEA officials note that cychlorphine is increasingly found in their fentanyl seizures and overdose death investigations. The youngest victim reported was a 16-year-old, with a majority of victims in their teens and 20s. Unlike fentanyl, there are no available test strips to detect cychlorphine. While Narcan can be used for overdose reversal, its effectiveness against this highly potent opioid may require multiple doses.

Nationally, research has linked cychlorphine to 140 deaths across 20 states and Canada. Illinois has recorded 15 such deaths, ranking third highest. The production of such synthetic opioids often originates in overseas labs, posing a constant challenge for public health tracking. As cychlorphine is not yet a scheduled substance, prosecutions for deaths related to it are not possible, highlighting a continuous cycle of emerging and more potent drugs.