What is fentanyl? The little-known but deadly drug that killed Prince, US news

One of the most dangerous drugs is a synthetic opioid ‘so potent and that even a microgram amount can kill’ – and it’s up to 50 times more powerful than heroin

Delivered 'Like A Pizza': Why Killer Drug Fentanyl Is So Hard To Stop - KFF Health News

It led to Prince's death, but what is the prescription medication fentanyl? - BBC News

Obama officials failed to focus as fentanyl burned its way across America - Washington Post

Super-deadly elephant tranquilizer suspected in Philly men's deaths

Dangerous Opioid Combo 'Gray Death' Is Latest Mixing Trend

Goldie Taylor—Fentanyl, the Miracle Drug That Killed Prince

Fentanyl figures in most fatal drug overdoses in U.S., researchers say

Autopsy: Prince died of fentanyl overdose

Prince death: Singer's family sues doctor over opioid addiction

Fentanyl overdose deaths spike across the country, a trend driven by secret labs and fake pharmacies - Voices For Awareness

Record US fentanyl bust 'enough to kill 26 million people

What Is Fentanyl and How Is It Getting to the US?