This transcript was prepared by a transcription service. This version may not be in its final form and may be updated. Ryan Knutson: The opioid epidemic has been gripping the US for decades. More than ...

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 ...

Fentanyl test strips can be purchased online for around a dollar apiece. The state even distributes them through its syringe exchange programs. Experts say these tests can save lives, giving people ...

In New York, fentanyl test strips are becoming more common as a way to fight an overdose crisis, and more states are pushing to legalize them. But not all users are trying to avoid the powerful drug.

The biotech company BTNX says it is shipping out new test strips this week that detect the presence of xylazine, an animal sedative that officials say is increasingly being mixed with fentanyl. As ...