A red stripe on a test strip indicates that a heroin sample is positive for fentanyl. In the face of relentless increases in overdose deaths that involve fentanyl, the strips have become an important ...

In an effort to slow the proliferation of synthetic opioid-related deaths, California will begin offering free fentanyl-testing strips to eligible organizations across the state that ask for them, the ...

(Editor's Note: This story is not about fentanyl addiction, which is a separate serious issue. This story is for people who would never intentionally take fentanyl, and their families and their kids' ...

Proponents say the ability to check drugs for the presence of lethal fentanyl may save lives. But critics say the strips enable drug use. By Jan Hoffman Photographs by Desiree Rios “You smoke weed?” ...