Here is a look at the opioid crisis and the tensions it has caused between China and the United States

​The US-China trade war truce includes a pledge by Beijing to tackle another lucrative — and deadly — export: fentanyl

Three of the four substances used in Carey Dean Moore’s execution had never been used in lethal injections in the state

Fentanyl killed more than 20 000 people in the US in 2016. It is 50 times more powerful than heroin and up to 100 times stronger than morphine

Nevada’s plan to use fentanyl has drawn criticism from medics and activists who call the move a dangerous human experiment