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| The chemical makeup of carfentanil. The drug is legally used to anesthetize large animals such as elephants and rhinoceroses. |
Carfentanil is a deadly "weapons-grade" synthetic opioid that illicit drug makers are adding to other drugs as a potent substitute for fentanyl. The drug, which authorities say is "10,000 times more potent than morphine and 100 times stronger than fentanyl, has seen a drastic resurgence across the U.S., killing hundreds of unsuspecting drug users," report Hallie Golden and Jim Mustian of The Associated Press.
Carfentanil's presence in illegal drugs sold in the U.S. has surged since the Chinese government's more recent "crackdown on the sale of precursors used to make fentanyl," AP reports. "Those regulations are likely prompting traffickers in Mexico to use carfentanil to boost the potency of a weakened version of fentanyl."
The sheer potency of carfentanil is what makes it so dangerous for anyone who takes drugs not prescribed by their doctor. Frank Tarentino, the U.S. Drug Enforcement Administration chief of operations for its northeast region, which stretches from Maine to Virginia, told AP, "You’re talking about not even a grain of salt that could be potentially lethal. This presents an extremely frightening proposition."
While some Mexican drug cartels may be making carfentanil in their own labs, others are purchasing it from darknet marketplaces. Regardless of where it originates, it's making its way onto American streets. Golden and Mustian write, "In 2025, DEA labs identified carfentanil 1,400 times in U.S. drug seizures, compared with 145 in 2023 and only 54 in 2022."
Russia used an aerosol form of carfentanil as a chemical weapon to subdue Chechen separatists in 2002, AP reports. It is legally used to anesthetize large animals, such as elephants.
Michael King Jr., founder of the Opioid Awareness Foundation, told AP, “It’s like a biological weapon. If the world thinks we had a problem with fentanyl, that’s minute compared to what we’re going to be dealing with with carfentanil.”







