Natco Pharma said the company and other drug makers have been named defendants in an antitrust lawsuit regarding a generic cancer treatment drug in the US.

The Hyderabad-based drug firm along with Celgene Corporation, Bristol Myers Squibb, Breckenridge Pharmaceutical Inc and others have been named defendants by Louisiana Health Service & Indemnity Company, D/B/A Blue Cross and Blue Shield of Losisiana and HMO Louisiana Inc, regarding anti-cancer treatment medication Pomalidomide.

The company believes this matter is without merit, Natco Pharma said in a statement.

Breckenridge is the abbreviated new drug application (ANDA) holder and distribution partner for the generic product in the US, it added.