Weapons-Grade Chemical Carfentanil Surges as Dangerous Fentanyl Substitute

Carfentanil, 10,000 times more potent than morphine, has seen a drastic resurgence across the U.S., killing hundreds of unsuspecting drug users.

Apr. 18, 2026 at 4:21am

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Carfentanil, a weapons-grade chemical that 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. The rise coincides with a recent crackdown by the Chinese government on the sale of precursors used to make fentanyl, prompting traffickers in Mexico to use carfentanil to boost the potency of a weakened version of fentanyl.

Why it matters

The surge of a drug so deadly that less than a poppy seed-sized amount can kill a person comes as fentanyl seizures and overall drug overdose deaths continue a multiyear decline. Experts say that even multiple high doses of naloxone might not be enough to reverse an overdose when carfentanil is involved, making it an extremely dangerous threat to public health.

The details

In 2025, DEA labs identified carfentanil 1,400 times in U.S. drug seizures, compared with 145 in 2023 and only 54 in 2022. Traffickers in Mexico may be experimenting with producing carfentanil themselves, while others could be procuring it from China-based vendors skirting the country's regulations. Complicating matters is the extreme danger associated with manufacturing carfentanil, which the DEA says 'you can't just dabble in'.

  • In 2025, DEA labs identified carfentanil 1,400 times in U.S. drug seizures.
  • In 2023, DEA labs identified carfentanil 145 times in U.S. drug seizures.
  • In 2022, DEA labs identified carfentanil 54 times in U.S. drug seizures.

The players

Michael Nalewaja

A 36-year-old Alaskan electrician who died after unknowingly taking a lethal cocktail of fentanyl and carfentanil that he may have mistaken for cocaine.

Kelley Nalewaja

Michael Nalewaja's mother, who is pushing for legislative and judicial changes after her son's death.

Frank Tarentino

The DEA's chief of operations for its northeast region, who said that carfentanil 'presents an extremely frightening proposition for substance abuse dependent people who seek opioids on the street today'.

Sara Carter

President Donald Trump's former drug czar, who said 'if those terrorists think they can continue this chemical warfare without consequences, they are wrong'.

Michael King Jr.

The founder of the Opioid Awareness Foundation, who said that carfentanil is 'like a biological weapon' and that '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'.

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What they’re saying

“You're talking about not even a grain of salt that could be potentially lethal. This presents an extremely frightening proposition for substance abuse dependent people who seek opioids on the street today.”

— Frank Tarentino, DEA's chief of operations for its northeast region

“Anyone who takes a pill that is not prescribed to them by their doctor is playing a game of Russian roulette with their life. But if those terrorists think they can continue this chemical warfare without consequences, they are wrong.”

— Sara Carter, President Donald Trump's former drug czar

“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.”

— Michael King Jr., Founder of the Opioid Awareness Foundation

What’s next

The DEA's proposed budget includes a $362 million increase centered on cartel-driven fentanyl trafficking, indicating that the agency is taking the surge in carfentanil seriously and plans to ramp up enforcement efforts.

The takeaway

The resurgence of the weapons-grade chemical carfentanil, which is 10,000 times more potent than morphine, poses a grave public health threat as it becomes a dangerous substitute for fentanyl. This crisis highlights the need for comprehensive strategies to combat the opioid epidemic, including improved access to addiction treatment, expanded distribution of overdose-reversing drugs, and targeted law enforcement efforts to disrupt the supply chain.