New Delhi, Jan. 6 -- New Delhi,

Mumbai :

Hyderabad-based Natco Pharma Ltd has filed a patent revocation petition before the Delhi high court against Danish drugmaker Novo Nordisk, which sells weight-loss drug semaglutide under the brand name Wegovy.

The Delhi high court single bench of Justice Jyoti Singh on 6 January issued notice to the global pharmaceutical giant, seeking its response within two weeks, and listed the matter for further hearing in February.

A patent revocation is a legal challenge seeking cancellation of an already granted patent on the ground that it is invalid. If a patent is revoked, the patent holder loses exclusive rights over the invention, allowing competitors to manufacture and sell the product.

Natco's pet...