What I have gathered from the news [
NYT for example is that Purdue Pharma (and the Sackler family) did two things:
1) they misrepresented oxycontin as "less addictive"
2) and "less likely to be abused"
3) and they promoted the drug very vigorously
4) for two decades
when, in fact, the company was aware from 1996 that oxycontin was as addictive as any other opiate and immediately became a drug-of-choice for addicts (it could be crushed and snorted, like cocaine).
It isn't clear to me how a high-dose opiate could be described as "less addictive"; opiates are by definition "addictive", and anybody in the medical field with a pulse knows that. (Opioids are addictive because opioid receptors in the brain become tolerant to the drug fairly quickly; this results in a need for more of the drug to achieve the same effects as previously. When used for terminal cancer or other patients, addiction is irrelevant. For young-to-middle-aged-chronic-pain-relief-patients (such as pain resulting from bone/joint injury or arthritis patients) addictiveness is a major issue.
Oxycontin became a street drug at once -- because the tablets could be easily re-sold, then crushed and snorted in several sessions--like cocaine.
Purdue Pharma became immediately aware of all this soon after the drug was introduced. Salesmen's reports from doctors reported street sales. Despite known abuse, the company continued intense promotion of the drug.
Drug companies and distributors know about how much of a drug a given pharmacy is likely to sell, and likewise how much of a drug a given community or county is likely to need. When sales from pharmacies, and in specific communities or counties grossly exceed expected use, abuse is obviously afoot.
There is nothing wrong with opioids; they are critically important drugs. They just happen to be addictive, and manufacturers, distributors, pharmacies, and doctors have to be alert to abuse.
Purdue Pharma, wholly owned by the Sackler family, apparently decided to make the most of abuse.
in addition to all that, there were bogus 'pain clinics' and cooperating pharmacies moving huge quantities of Oxytocin.