Nearly two decades after drug addiction sent him to rehab as a teenager, 36-year-old Michael Nalewaja had settled into a quiet life in Alaska where he worked as an electrician. That all came crashing ...

A dangerous and largely invisible threat is re-emerging in the illicit drug supply: Carfentanil, an extremely potent synthetic opioid linked to a growing number of overdose deaths. Carfentanil is ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A drug that is 100 times more potent than fentanyl and 10,000 times ...

In 1974, Janssen Pharmaceuticals chemists synthesized a compound so potent a few micrograms immobilized an elephant or rhinoceros. Marketed as Wildnil for wildlife anesthesia, carfentanil was used for ...