The Drug Enforcement Agency (DEA) has issued a warning against dangerous counterfeit prescription pills from Mexico that are killing Americans. 

The DEA reports that Mexican drug cartels are manufacturing mass quantities of these counterfeit pills that contain fentanyl, a dangerous synthetic opioid that is lethal in small doses. 

The department also found that 27 percent of tablets seized nationwide between January and March of this year had potentially lethal doses of fentanyl. 

"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 reports that Fentanyl and other highly potent synthetic opioids remain the primary driver behind the ongoing opioid crisis, with fentanyl involved in more deaths than any other illicit drug.