Hydrocodone, oxycodone, and oxycontin.
Hydrocodone with acetaminophen (Vicodin). Number of prescriptions in the US in 2010 - 131.2 million.
DEA production quota for oxycodone, 2012, 108 tons.
Oxycontin has been reformulated to make it harder to abuse by snorting or injecting, so is being replaced as an abused pharmaceutical of choice by oxymorphone, brand name Opana.
Reminiscent of NuMorphan, sold in the 60’s and crushable andd injected. Thousands died. It was meant to be a morphine replacement.