By Pat Anson, PNN Editor

A new illicit opioid that is 20 times more potent than fentanyl has been linked to at least eight fatal overdoses in the U.S. in the last month, according to a public safety alert released by a Pennsylvania research laboratory.

The Center for Forensic Science Research & Education (CFSRE) said its scientists detected N-pyrrolidino etonitazene -- also known as etonitazepyne -- in eight blood samples taken during recent death investigations in West Virginia, Pennsylvania, New York, Florida and Colorado.  Four of the deaths occurred in West Virginia.

“The toxicity of N-pyrrolidino etonitazene has not been examined or reported but recent association with death among people who use drugs leads professionals to believe this synthetic opioid retains the potential to cause widespread harm and is of public health concern. Identifications of N-pyrrolidino etonitazene have also been reported recently from agencies in Europe,” the safety alert said.

Etonitazepyne is a synthetic opioid that is chemically similar to etonitazene, another powerful narcotic that started appearing in illicit drug markets and counterfeit pills in the U.S. and Canada last year.  While etonitazene is classified as an illegal Schedule I controlled substance by the DEA, etonitazepyne has not specifically been scheduled. Several websites even list it for sale for “chemical research.”

"The current drug landscape in the United States is unstable and unpredictable – especially the opioid market – which can ultimately lead to deadly outcomes," said Dr. Alex Krotulski, an associate director at CFSRE. "The purpose of this public alert is to raise awareness about a new and already deadly synthetic opioid so that way people who use drugs are able to modify use patterns and so that laboratories know to test for this new drug in their states or jurisdictions.”

Etonitazepyne may be new to law enforcement, coroners and public health officials, but illicit drug users have been warning each other about the drug for several months in online message boards.

“I got a report about an overdose with only 1 MG of Etonitazepyne (snorted) that caused a pretty high tolerance user to become unconscious and stopped breathing, and he had to be rescued from paramedics,” a poster said on Reddit.

“Everyone needs to be careful with this one. It's not for anyone who has no tolerance to opioids, and can still be dangerous for those who do,” another poster wrote.