US overdose deaths declined for the third straight year in 2025, but experts worry about potential policy and drug supply changes that could reverse this trend, with new substances emerging in the US drug supply.

US overdose deaths fell again in 2025, with preliminary government data showing about 70,000 Americans died of drug overdoses last year, a 14% decrease from the previous year. This marks the third consecutive annual decline, making it the longest decline in decades. The 2025 total is roughly equivalent to the number of overdose deaths in 2019, before the COVID-19 pandemic.

Declines in overdose deaths were seen across various drug types, including fentanyl, cocaine, and methamphetamine. Additionally, the majority of states experienced a decrease in overdose deaths, although seven states saw slight increases, with Arizona, Colorado, and New Mexico experiencing jumps of 10% or more. Brandon Marshall, a Brown University researcher who studies overdose trends, expressed cautious optimism that this decline represents a fundamental change in the arc of the overdose crisis.

However, the number of Americans dying from overdoses remains high, and deaths declined at a slower pace last year. Several factors could cause deaths to rise again, including government policy changes or a shift in the drug supply. Marshall and other researchers emphasize that if deaths are decreasing rapidly, they can also increase just as quickly if efforts to combat the crisis are relaxed. The overdose-reversal drug Narcan has been instrumental in saving lives, and its increased availability is one of the possible factors contributing to the decline in overdose deaths.

The pandemic played a significant role in the overdose epidemic, with social isolation and difficulties accessing addiction treatment contributing to a dramatic spike in overdose deaths. As the pandemic waned, deaths declined, and researchers point to various factors that may have contributed to this decline, including expanded addiction treatment, shifts in drug use patterns, and the impact of opioid lawsuit settlement money. Some research suggests that the number of people likely to overdose has been shrinking, as fewer teens take up drugs and many illicit drug users have died.

New substances are emerging in the US drug supply, with health and law enforcement officials sounding alarms about newer drugs that were increasingly detected in 2025. The Center for Forensic Science Research and Education, a federally funded toxicology lab, identified 27 new drugs in 2025 and has already identified 23 in the first few months of 2026. One of the drugs on the lab's radar is cychlorphine, a potent synthetic opioid described as up to 10 times stronger than fentanyl, which is being used as a cutting agent in other illicit drugs without the buyer's knowledge.

Meanwhile, the Trump administration has been cutting programs designed to reduce overdose deaths and infections tied to drug use. The federal government has notified grant recipients that it will no longer pay for test strips and kits that help drug users detect highly lethal additives in their drugs. Officials say they are shifting away from services that facilitate illicit drug use, including clean syringes and hotlines for drug users. A group of women who lost children to overdoses has spoken out against government policies that emphasize punishment and incarceration, arguing that harm reduction services are essential to reducing overdose deaths.

The decline in overdose deaths is a positive trend, but experts remain cautious, recognizing that the overdose crisis is complex and multifaceted. As new substances emerge in the US drug supply and government policies evolve, it is crucial to continue monitoring the situation and adapting strategies to address the crisis effectively. The nation's decades-long overdose epidemic has played out at different paces in different parts of the country, and it is essential to consider regional differences in the illicit drug supply and drug use patterns when developing policies and interventions. By acknowledging the complexities of the overdose crisis and working to address its root causes, it may be possible to sustain the decline in overdose deaths and ultimately create a safer, healthier environment for all Americans.