Why is fentanyl so deadly? What was it originally for?

In the early 1960s the synthetic opioid was manufactured and approved by the FDA a few years later, for a specific purpose: to treat pain.

If You Can See It, It Can Kill You

Why Fentanyl Is So Much More Deadly Than Heroin

The Fentanyl Epidemic: How and Why Fentanyl Became One of the Most

DEA Washington Division Announces the Seizure of Over 8 Million of

This photo shows exactly why Fentanyl is deadlier than heroin

Visualizing fentanyl's swift, dangerous effects on the brain and body

Fentanyl: The Most Dangerous Illegal Drug in America

Fentanyl Fact Sheet

What Is Fentanyl and Why Is It So Dangerous? - WSJ

HSC's fentanyl awareness campaign

Synthetic Fentanyl Deaths Rise in Americans Opioid Epidemic

Here's what families need to know about fentanyl – OCDE Newsroom