Austin-area residents are being warned about cychlorphine, a newly identified synthetic opioid that early lab data suggest is several times stronger than fentanyl and tied to dozens of deaths across the country. The drug can be pressed into fake pills or mixed into street powders without a user’s knowledge, turning what someone thinks is a casual experiment into a life-or-death gamble. Health workers say standard fentanyl test strips and many routine hospital panels may miss it, which makes quick response and easy access to naloxone especially important.
On April 30, the White House Office of National Drug Control Policy issued a Drug Threat Notice reporting that cychlorphine has been detected in all four U.S. census regions and was involved in at least 55 deaths between 2025 and 2026, with the highest prevalence in Ohio, Texas, and Tennessee. The notice warns that overdoses may require multiple doses of naloxone and that the drug often slips past routine detection methods.
Forensic researchers at the Center for Forensic Science Research and Education say the compound, formally N‑propionitrile chlorphine, was first identified in mid‑2024 and has since appeared in dozens of fatal cases. Federal law enforcement has echoed the concern, reporting that cychlorphine is turning up mixed with fentanyl and other drugs and that responders should be ready to deliver multiple doses of naloxone in some overdose cases. The agency is blunt: treat any pill or powder that did not come from a pharmacy as potentially lethal.
In the Austin area, public health officials and community groups have spent years expanding naloxone access, rolling out vending machines, and stocking first-responder units. Central Health and Travis County’s push to add those machines and distribute thousands of Narcan doses has helped push local overdose deaths downward.
Recognize And Respond
Signs of an opioid overdose can include slow or stopped breathing, pinpoint pupils, blue or gray lips or fingertips, and unresponsiveness. If you suspect an overdose, call 911 right away, give naloxone if you have it, and stay with the person until emergency crews arrive, according to NIDA.
Why It’s Hard To Spot
Cychlorphine belongs to a family of designer “orphine” opioids that standard fentanyl test strips and many common hospital toxicology screens may not pick up. Community testing labs report that it often shows up only when samples are run on advanced mass-spectrometry instruments. Laboratory providers such as Aegis Sciences note that cychlorphine frequently appears in complex mixtures, which raises the risk of sudden, severe overdoses and may require specialized testing to identify what was actually taken.
Where It’s Turned Up
The largest known cluster so far has come out of East Tennessee, where the Knox County Regional Forensic Center has linked cychlorphine to at least 41 deaths across 11 counties between July 2025 and February 2026, according to WIVK. International monitoring and forensic data compiled by UNODC show detections in multiple U.S. states and other countries, underscoring how quickly the drug has spread geographically.
If you are worried about a possible exposure or a suspected overdose, call 911 and administer naloxone if you can. Poison Control is available at 1‑800‑222‑1222 for additional guidance. Federal advisories also urge clinicians to consider specialized testing for unexplained overdoses and to request help from DEA toxicology resources, according to the DEA.
