Counties where the most opioids are dispensed in Montana

When Purdue Pharma first began sales of OxyContin in the late 1990s, it was advertised as relief for cancer patients and people with chronic pain. Aggressive marketing fueled the drug's popularity, along with that of other opioid pain management drugs on the market. But as the company touted OxyContin to physicians, it downplayed the drug's addictiveness, according to confidential Justice Department reports obtained by news organizations, leading to widespread use that has fueled an opioid epidemic across the U.S.

More than 645,000 people have died from opioid-related overdoses between 1999 an...