Who created oxycontin?

See the DrugPatentWatch profile for oxycontin

Who invented OxyContin (oxycodone) and who made it a product?

OxyContin was created by Purdue Pharma, the company that developed the extended-release formulation of oxycodone and introduced it as a branded prescription medicine.

Which people were behind the creation?

Public sources typically credit Purdue Pharma’s development team and leadership for bringing the extended-release product to market, but the “creator” is generally identified at the company level rather than a single named inventor.

Was the active ingredient invented separately from the brand?

The active opioid ingredient, oxycodone, was developed earlier than OxyContin and later incorporated into Purdue Pharma’s extended-release formulation that became the branded drug.

How to verify the specific “creator” you mean

If you mean the inventor of oxycodone versus the company that developed OxyContin’s extended-release technology, the answer differs. If you share whether you mean the chemical (oxycodone) or the branded extended-release drug (OxyContin), I can narrow the attribution.

Sources:
(No sources provided in the prompt.)