U.S. authorities are warning of a new synthetic opioid from China that can be up to 50 times more potent than fentanyl.
Nitazenes pose an emerging threat because they are more resistant to naloxone, a medication that can reverse opioid overdoses. They are often mixed with other drugs and delivered in the form of counterfeit pills mimicking drugs such as Xanax or Percocet, according to authorities.
