Oxycontin was developed as a time-release version of hydrocodone, similar to MS Contin.

“so whose idea is oxy content I mean in some sense it's an obvious leap because if Ms content is simply morphine sulfate formulated in a continuous fashion there are other um narcotics out there per cassette already existed it was simply hydrocodone with acetaminophen hydrocodone existed by itself in a non-time relased format so was there great Innovation basically saying we're just going to make a Time relase version of hydrocodone just as it had been done with morphine was that effectively the aha moment”