In exclusive interview with USA TODAY, Kevin Brosseau says the US-Canada effort has alleviated the fentanyl crisis but that nitazenes and others pose a threat.

Add Yahoo as a preferred source to see more of our stories on Google. C.J., 38, is seen on Sixth Street, a hotspot for opioid abuse in San Francisco, on Thursday. A Bay Area native who has been ...

FIRST ON FOX: A trio of Republican senators is introducing a coordinated slate of legislation to crack down on nitazenes — a class of synthetic opioids that are little known to the public but ...

SAN FRANCISCO (KGO) -- San Francisco has thrown just about everything to try to put an end to the drug markets with little or no success. But now, some city officials say they have one more plan never ...