I think you refer to this article: The Opioid Epidemic Hits The European Union [1]. Note that the title of that article contradicts the contents though. There is a big difference between the current opioid epidemic in the US, and an 'increase in non-medical drug use for prescription painkillers'.. One of the researchers is even quoted to say: "We can learn much from the E.U. in terms of how to prescribe opioids in the context of a national healthcare system"

[1] https://www.forbes.com/sites/cjarlotta/2016/08/09/high-rates...