Purdue Pharma sues Amneal over OxyContin

Drugs company Purdue Pharma has filed a complaint against US-based generics company Amneal Pharmaceuticals for alleged patent infringement.

The case, which centres on Purdue’s OxyContin (oxycodone), was filed on Wednesday, March 1 at the US District Court for the District of Delaware.

OxyContin is used to treat moderate to severe pain that is expected to last for an extended period of time.

The dispute comes after Amneal filed an Abbreviated New Drug Application with the Food and Drug Administration seeking permission to market a generic version of the drug.

The patents involved in the case are US numbers 9,492,392; 9,492,393; and 9,522,919.

Purdue has asked the district court to enter a judgment that Amneal has infringed its patents, as well as a permanent injunction enjoining Amneal from bringing the generic product to market.