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Nearly 20 years after battling drug addiction as a teenager, 36-year-old Michael Nalewaja had built a stable life in Alaska working as an electrician. However, just days before Thanksgiving 2025, his life was tragically cut short after unknowingly ingesting a deadly mix of fentanyl and carfentanil, substances he and a friend likely mistook for cocaine.
“I heard the word ‘autopsy’ and just collapsed,” recalled his mother, Kelley Nalewaja, who received the heartbreaking call from Michael’s wife. She added that even if someone had administered Narcan or called 911 in time, survival was unlikely given the potency of the drugs involved.
Carfentanil, a chemical originally designed as a tranquilizer for large animals, is approximately 10,000 times stronger than morphine and 100 times more potent than fentanyl. Authorities report a sharp resurgence of this lethal substance across the U.S., contributing to numerous fatal overdoses among unsuspecting users.
This alarming increase coincides with China’s recent crackdown on precursor chemicals used to manufacture fentanyl. According to intelligence from the U.S. Drug Enforcement Administration (DEA), Mexican traffickers are reportedly turning to carfentanil to enhance the strength of diluted fentanyl supplies.
Despite an overall decline in fentanyl seizures and drug overdose deaths over recent years, the rise of carfentanil remains a grave concern. Frank Tarentino, the DEA’s chief of operations for the Northeast, warned, “You’re talking about not even a grain of salt being potentially lethal,” underscoring the extreme danger faced by individuals seeking opioids on the street today.
A decade ago, carfentanil had already infiltrated the North American drug market, causing hundreds of overdoses before China’s ban slowed its spread. However, DEA data shows a dramatic surge in carfentanil seizures in 2025, with 1,400 instances identified-up significantly from just 54 in 2022.
Authorities believe some Mexican cartels may now be manufacturing carfentanil domestically, while others source it from Chinese vendors circumventing regulations through online channels. Still, producing carfentanil is fraught with danger due to its extreme toxicity, making it not a task for amateur chemists, Tarentino explained.
Meanwhile, overdose deaths have fallen for the longest stretch in decades, attributed to factors such as wider availability of naloxone and expanded addiction treatment services. However, experts caution that multiple doses of naloxone may still be insufficient to reverse overdoses involving carfentanil.
Fentanyl seizures have also dropped sharply, with Customs and Border Protection reporting a decline to roughly 12,000 pounds in 2025-less than half the amount seized two years earlier. Nonetheless, the DEA continues to prioritize combating fentanyl trafficking, recently seeking a $362 million budget increase focused on cartel-driven operations.
Sara Carter, former drug czar under President Trump, emphasized the deadly stakes: “Anyone taking pills not prescribed to them is playing Russian roulette with their life. Those pushing these substances are waging chemical warfare.”
Though carfentanil remains less prevalent than fentanyl, its association with chemical weapon research and deployment in military operations heightens the threat. The DEA strictly limits lawful production to 20 grams annually, just enough to tranquilize large animals like elephants.
Michael King Jr., founder of the Opioid Awareness Foundation, called carfentanil “like a biological weapon,” warning that its impact could far surpass that of fentanyl. Data from the Centers for Disease Control and Prevention shows carfentanil-related deaths nearly tripled in 2024, with 413 fatalities reported across 42 states and Washington, D.C.
Former DEA official Mike Vigil stressed the need for focused law enforcement efforts and intelligence gathering to curb the spread of carfentanil among drug users.
Recent large seizures underscore the ongoing challenge: in October, DEA agents in Los Angeles discovered 628,000 pills containing carfentanil, and in September, officials in Washington state confiscated over 50,000 counterfeit pills laced with carfentanil and acetaminophen.
Some drug users, having developed tolerance to fentanyl, seek out carfentanil for its intense effects despite the risks, explained Rob Tanguay of Recovery Alberta. For traffickers, the drug’s extreme potency means smaller quantities can supply larger markets, making it highly profitable.
“It’s all about money,” Tanguay said.
In the wake of her son’s death, Kelley Nalewaja opted against a large funeral and instead organized a community town hall in El Dorado Hills, California. Bringing together local officials and other grieving families, she advocates for legislative and judicial reforms to prevent further tragedies from this “murder weapon,” as she calls carfentanil.
“This is not just an overdose,” she said. “It’s a weapon designed to kill.”
The rise of carfentanil presents a daunting new front in America’s ongoing battle against the opioid epidemic, underscoring the urgent need for comprehensive strategies to protect vulnerable communities.