Biden administration targets fentanyl-xylazine as deadly national threat.

The Biden administration has declared fentanyl combined with xylazine, an animal tranquilizer increasingly used in illicit drugs, an "emerging threat" facing the United States due to its role in the ongoing opioid crisis. Xylazine has been linked to an increasing number of overdose deaths in the United States due to its rising illicit use. The move marks the first time in history that any administration has declared a substance to be an emerging threat to the country. The administration has 90 days to coordinate a national response to the threat.