“Capitalizing on the opioid epidemic and prescription drug abuse in the United States, drug trafficking organizations are now sending counterfeit pills made with fentanyl in bulk to the United States for distribution,” said DEA Acting Administrator Uttam Dhillon. “Counterfeit pills that contain fentanyl and fentanyl-laced heroin are responsible for thousands of opioid-related deaths in the United States each year.”

The DEA laboratory analysis found fentanyl in 21% of the heroin samples tested. Fentanyl is often added to illicit drugs to boost their potency.

‘Enough to Kill Entire Population of Ohio’

In recent months, there have been outbreaks of fentanyl-related overdoses around the country. Law enforcement agencies are also seizing larger amounts of fentanyl from drug traffickers.

In September, DEA agents found a pill press and five pounds of pure fentanyl in a San Diego apartment. Prosecutors said that was “enough to kill the city of San Diego” or about 1.5 million people.

That seizure was overshadowed a few weeks later, when 45 pounds of suspected fentanyl were seized in Montgomery County, Ohio. A Homeland Security agent said that was "enough to kill the entire population of Ohio, many times over."

Public health officials in Seattle recently warned about a spike in fentanyl-related overdoses that killed at least 141 people in King County, including several teenagers. Parents and students are being warned in public service announcements not to consume any pill not directly obtained from a pharmacy or prescriber.