carfentanyl
Opioids are killing tens of thousands more people than we thought, study finds
Public health officials overlooked more than 70,000 opioid-linked deaths from 1999 to 2015, according to the study.
Fentanyl, the Drug Deadlier Than Heroin, Has Reached the UK
Everything you need to know about the drug that has already caused a spate of fatal overdoses.
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