"Between 2006 and 2012, opioid drug makers and distributors flooded the country with 76 billion pills of oxycodone and hydrocodone—highly addictive opioid pain medications that sparked the epidemic of abuse and overdoses that killed nearly 100,000 people in that time period...
According to an analysis of the data by the Post, just three companies made 88% of the opioid pills: SpecGx, Actavis Pharma, and Par Pharmaceutical, a subsidiary of Endo Pharmaceuticals. Purdue Pharma ranked fourth, making 3% of the pills. Just six companies distributed 75% of the pills: McKesson Corp., Walgreens, Cardinal Health, AmerisourceBergen, CVS, and Walmart." Quote from Are Technica: