DEA warns of cychlorphine, potent synthetic opioid found in Humboldt County

Two Northern California drug samples have already tested positive for cychlorphine, a synthetic opioid the DEA says may be more potent than fentanyl, putting Humboldt County and surrounding communities on alert for a threat that can slip past familiar safety checks.

The drug, also called N-propionitrile chlorphine, belongs to a newer class of laboratory-made opioids known as orphine analogues, or orphines. DEA Special Agent in Charge Bob Beris said the compound was first reported by a DEA laboratory in Florida in April 2024, and federal labs had identified it in 22 samples nationwide by the end of February 2026. That spread matters because fentanyl has already reshaped the overdose crisis across California, and another synthetic opioid with even less public familiarity raises the stakes for people using drugs, families, and first responders in Humboldt County.

Public alert materials from the Center for Forensic Science Research and Education warned in January 2026 of an increase in fatal overdoses linked to cychlorphine. The Office of Justice Programs published that alert the same month. The broader orphine class traces back to brorphine, the first highly potent synthetic opioid in the group, which was detected in European drug markets around 2019 and in the United States in 2020. That history shows cychlorphine is not an isolated chemical oddity but part of a fast-moving wave of new opioids.

The immediate danger is that common fentanyl test strips do not detect cychlorphine. Beris warned that a person could test a sample, get a negative fentanyl result, and wrongly assume it is safe. Health alerts also say the drug has turned up in counterfeit tablets, including fake oxycodone and fake hydromorphone pills, as well as in fentanyl powders. That means the risk is not limited to one kind of street drug or one method of use.

Some public-alert materials say naloxone is believed to remain effective for cychlorphine overdoses, but the evidence base is still limited. In the meantime, officials in Humboldt County are being pushed toward the same practical message repeated in warnings from Montreal to South Carolina: carry naloxone, do not use alone, and treat any suspected overdose as a medical emergency. The new warning is a reminder that the county’s overdose landscape remains volatile, and that the next dangerous drug may not announce itself with a positive fentanyl strip.