10/27/2014, Opioids prescribed by doctors led to 92,000 overdoses in ERs in one year

http://www.latimes.com/science/sciencenow/la-sci-sn-opioid-overdose-prescription-hospital-er-20141026-story.html

“Overdoses involving prescription painkillers have become a leading cause of injury deaths in the U.S….”

Why doesn’t the media pay attention to the word “involve”?  The problem is the mixture of drugs which cause overdoses, not any certain one.