Please remember that Purdue were the ones who marketed Oxycontin on the premise of one dose for 12-hour pain relief.
When they learned doctors were prescribing it for eight hours, they tried to "re-train" them to use the "proper" (read: their) dosing recommendation, because there were cheaper drugs with six of eight hour doses.
Sure, the doctors made the prescriptions, but you, and I, and everyone who thinks honestly about it for two and a half seconds realizes that no matter what the recommendation is, enough people who are in bad enough pain to be prescribed oxy will take it when they need it, recommendation be damned, that to have issued that recommendation in the first place was an act of bad faith.
They marketed the drug on a lie in order to get doctors to prescribe it, which fueled — if not created — an epidemic, which has killed tens of thousands of people. Their hands are not clean, here.