https://www.npr.org/sections/health-shots/2013/04/17/1776023...
> In 2010, Purdue Pharma LP replaced the original OxyContin with an abuse-resistant form, in an effort to reduce deaths and overdoses caused by the powerful pain medication, which was licensed in 1995.
> The new version of OxyContin includes an ingredient, a polymer, that makes it harder to crush and snort or inject to get a quick, heroin-like high. When the new version was introduced, Purdue pulled the original OxyContin off the market. The patent on the new version runs until 2025.
> On Tuesday, the FDA said that it won't approve generic versions of the original formulation of OxyContin, a long-acting narcotic pain medication, which went off patent that day.