Researchers at McGill University say there's little evidence internet sales of drugs and errors by doctors and patients are responsible. Instead, they cite a dramatic increase in prescriptions and sales of narcotics, increased use of strong long-acting opioids like oxycontin and methadone, and the combined use of various drugs and alcohol.
The findings point to a complicated "epidemic" in which physicians, users, the health care system, and the social environment all play a role, according to the researchers.
The U.S. and Canada are #1 and #2 in the per capita use of opiods.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.