President Donald Trump signed an executive order Dec. 15 that designates illicit fentanyl and its core precursor chemicals as weapons of mass destruction, citing the drug’s role in the deaths of hundreds of thousands of Americans.

“No bomb does what this is doing: 200,000 to 300,000 people die every year that we know of,” Trump said at the White House before signing the order. “So we’re formally classifying it a weapon of mass destruction.” 

In a fact sheet alongside the order, the White House said illicit fentanyl is “closer to a chemical weapon than a narcotic.” The statement noted that as little as two milligrams of fentanyl — roughly 10 to 15 grains of table salt — is considered a lethal dose. 

The order directs the Pentagon, the Department of Justice (DOJ), the Department of Homeland Security, and other federal agencies to use national security tools to disrupt fentanyl production and distribution. Those measures include tougher sanctions, enhanced penalties, and intelligence sharing.

The White House said fentanyl profits are used by cartels and foreign terrorist organizations to fund assassinations, terrorism, and insurgencies, adding that the drug’s potential use in terror attacks by organized adversaries poses “a serious threat” to the U.S.

According to CBS News, most fentanyl entering the U.S. is produced in Mexico using precursor chemicals largely sourced from China and India. It is then trafficked across the border, primarily through ports of entry.

The order is the latest step in a series of actions Trump has taken since returning to office aimed at combating fentanyl.

Earlier this year, Trump imposed tariffs on China, Canada, and Mexico, arguing those countries must do more to curb the flow of fentanyl into the U.S., according to The Hill. He has also designated multiple drug cartels as foreign terrorist organizations. In July, he signed the HALT Fentanyl Act into law, permanently classifying fentanyl-related substances as a Schedule I drug under the Controlled Substances Act.