LA County confirms first death from synthetic opioid cychlorphine

Los Angeles County has recorded its first confirmed fatal overdose linked to cychlorphine, a synthetic opioid that laboratory testing suggests is roughly ten times stronger than fentanyl. The Los Angeles County Department of Public Health stated that the death occurred in February, marking the first confirmed presence of the drug in the county's illicit drug supply.

The county Medical Examiner’s Office identified cychlorphine as a cause of death. Health officials warned that the substance, also known as N-propionitrile chlorphine, can cause severe respiratory depression and death, noting that exposure to even a small amount can cause a person to stop breathing.

Detection Challenges

A significant concern for public health officials is that standard fentanyl test strips cannot detect cychlorphine. This means the drug can be mixed into other illicit drugs without users knowing it is present. The Los Angeles County Department of Public Health stated that cychlorphine may be mixed into illicit drugs without users’ knowledge, increasing the risk of an overdose.

According to the health department, cychlorphine was first detected in the illicit U.S. drug supply in 2024 and has since been identified in 19 states. The substance has been found in powders, counterfeit prescription pills, rocks or crystals, and liquids. The risk of death is heightened when cychlorphine or other opioids are combined with alcohol, sedatives, painkillers or other drugs.

Federal and Local Response

The U.S. Drug Enforcement Administration classified cychlorphine as a Schedule I controlled substance in August 2026, making it illegal to possess or sell. The Food and Drug Administration has not approved the drug for any medical use.

LA County's case follows another cychlorphine-caused death reported in Northern California in April. According to the county health department, a 16-year-old in San Francisco died that month from an overdose involving the drug, which was Northern California's first confirmed cychlorphine fatality.

Nationally, the White House Office of National Drug Control Policy reported in May 2026 that there were at least 55 cychlorphine-linked deaths, with the heaviest concentration in Tennessee, Ohio and Texas. The April federal warning reported 106 cychlorphine drug-supply reports in ten states during 2025, compared with 1 report in 2024.

Safety Recommendations

Los Angeles County health officials are monitoring the local illicit drug supply for signs of increased cychlorphine circulation. They are advising residents to avoid illicit substances altogether, since cychlorphine may be present without a user's knowledge.

"The safest course of action is to avoid using illicit substances, given the possibility of the presence of cychlorphine," health officials said.

Residents are urged to carry naloxone, the overdose-reversal medication, which can restore breathing in someone experiencing an opioid overdose, including one involving cychlorphine. Officials noted that multiple doses may be necessary to reverse an overdose. Naloxone is available as a nasal spray or an injection through county community health stations, public health centers, retail pharmacies and medical providers.

Anyone responding to a suspected overdose should immediately call 911 and administer naloxone. Drug samples can be tested for cychlorphine through a free drug-checking program at drugcheckingla.com, which delivers results in approximately 15 to 20 minutes.

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Sources

• psychologytoday.com: Cychlorphine Is a New Opioid Hidden in Counterfeit Pills | Psychology Today
• hoodline.com: LA County's First Cychlorphine Overdose Death Confirmed
• pasadenastarnews.com: LA County report 1st fatal overdose on cychlorphine, a synthetic opioid stronger than fentanyl – Pasadena Star News
• westsidecurrent.com: First LA County Cychlorphine Death Highlights Testing Blind Spot | County News | westsidecurrent.com
• dailybulletin.com: LA County report 1st fatal overdose on cychlorphine, a synthetic opioid stronger than fentanyl – Daily Bulletin

This article was drafted with AI assistance and checked against the sources above. Company claims are reported as claims. Cover image is AI-generated.