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

Fentanyl-Laced Cocaine Becoming A Deadly Problem Among Drug Users : Shots - Health News : NPR

The Fatal “Blues” — LEB

Prince died from sky-high levels of fentanyl, report obtained by Associated Press shows - CBS News

Drug salesmen arrested for paying doctors to prescribe fentanyl

The powerful opioid that killed Prince

Fentanyl-spiked pills killed these Kansas City area teens

Prince died of opioid overdose, official says

Prince death: Opioid painkillers found at singer's home - BBC News

Mexican Oxy Opioid Pills Take Deadly Toll On Southwest US - Bloomberg

Pills seized from Paisley Park contained illicit fentanyl, same drug that killed Prince

Prince Died From Accidental Overdose of Opioid Painkiller - The New York Times

Obama officials failed to focus as fentanyl burned its way across America – The Morning Call