Purdue aggressively marketed OxyContin as having a very small rate of addiction to doctors who weren't pain specialists and thus had little experience with controlled medications, while providing a dosing regime that was almost designed to cause addiction. (It's sole advantage was as a timed-release medication; if pain returned before time for the next dose, doctors were instructed (strongly) to raise the dosage rather than increase the number of doses per day.)
"The Promotion and Marketing of OxyContin: Commercial Triumph, Public Health Tragedy" (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2622774/)
"The Family That Built an Empire of Pain" (https://www.newyorker.com/magazine/2017/10/30/the-family-tha...)