A synthetic opioid reportedly up to 10 times stronger than fentanyl has already been linked to at least 55 deaths nationwide, with specialists calling it the new fentanyl on steroids.
Health officials and an addiction specialist are sounding the alarm after a novel synthetic opioid called cychlorphine was tied to dozens of fatal overdoses across the United States.
Fox News Digital reported that Tennessee emerged as an early hotspot, while fatal overdoses also appeared in Illinois, California, and Oklahoma, according to public health and law enforcement records. The White House Office of National Drug Control Policy cited the national toll in an April 2026 notice.
Nicholas Kardaras, Ph.D., CEO and chief clinical officer of the New York Center for Living in Manhattan and a clinical professor at Stony Brook Medicine, described the drug in blunt terms to the outlet.
"This new synthetic drug is making fentanyl look like yesterday's candy."
Kardaras also called cychlorphine "the new fentanyl on steroids" and "one of the most potent synthetic opioids" now showing up in the illicit supply.
Tennessee’s health department announced in March that more than 30 fatal overdoses had been associated with cychlorphine since October 2025.
The White House Office of National Drug Control Policy later cited at least 41 Tennessee deaths between July 2025 and February 2026, along with at least 55 deaths nationally. Those figures put hard numbers on a threat that spread beyond one state in a matter of months.
The pattern fits a larger fentanyl overdose crisis that has already shown how synthetic opioids reach every corner of American life.
The Drug Enforcement Administration describes cychlorphine as a novel, unregulated synthetic opioid. It activates the same receptors as fentanyl. It can cause profound sedation, slowed or stopped breathing, or death. It is not approved for medical use and has been detected in illicit drugs and counterfeit pills.
The Los Angeles County Department of Public Health issued its own advisory on the drug’s power.
"Cychlorphine is particularly dangerous due to its strength, where a very small amount can cause someone to stop breathing"
That official warning matches the potency math Kardaras laid out. He told Fox News Digital that fentanyl is about 50 times more potent than morphine or heroin.
"Cychlorphine is reportedly up to 10 times more potent than fentanyl, so theoretically, about 500 times more potent than morphine or heroin."
People take it as a pill, snort it as powder, or crush it for intravenous use. Kardaras said the bigger problem is how often it is mixed into other designer drugs and counterfeit pills. Some users seek the strength. Others swallow it without knowing what they bought.
Federal cases already show how fentanyl trafficking networks move product into American communities; a stronger analog only raises the stakes for the same pipelines.
Kardaras pointed to younger people as especially exposed. Some are more likely to experiment or to purchase counterfeit pills. Online and boutique designer-drug markets make the reach worse.
"They’re buying something online... and all of a sudden, without knowing it, they’re ingesting fentanyl or another synthetic opioid,"
He also noted the awkward side effect of public warnings themselves.
"Sometimes, by talking about how potent some of these substances are, we increase the allure of them for some addicts, unfortunately,"
That tension does not erase the duty to warn. It does show how fast the illicit market adapts when a stronger compound appears.
Cartel-linked supply routes out of Mexico remain a persistent backdrop for these synthetic floods, including grim discoveries such as the Michoacán site finds that keep drawing scrutiny south of the border.
The DEA advises people to administer naloxone immediately, call 911, and be ready to give additional doses. Kardaras said the practical reality on the street is already shifting.
"What used to take one or two doses of Narcan to reverse an overdose may now require five or six doses, based on anecdotal evidence,"
Detection is another gap. Standard fentanyl test strips and routine hospital opioid urine screens do not pick up cychlorphine. Kardaras called the combination of extreme potency, hidden mixing, and blind testing “a triple whammy.”
He summed up the enforcement and clinical chase in one line: "It's a constant battle of keeping up with the latest iterations of new drugs."
High-profile deaths tied to drugs continue to surface in unexpected places, from overdose cases to incidents like the sudden loss of Lucian Piane, reminding readers that the street supply does not stay neatly confined to one demographic.
Between the Tennessee counts, the ONDCP national figure of at least 55 deaths, and the additional reports from Illinois, California, and Oklahoma, the record is no longer limited to a single local spike.
Cychlorphine is unregulated, unapproved, and already embedded in counterfeit pills and other designer products. First responders may need more naloxone. Hospitals may not see it on standard screens. Users may not know they took it.
American families have watched fentanyl revise the overdose map for years. A compound described as up to ten times stronger is now leaving bodies in multiple states while labs and street tests lag behind. Secure borders, serious trafficking prosecutions, and honest public health alerts are not optional extras. They are the minimum required to keep the next analog from writing the same story with a higher body count.