Novo Nordisk, which also makes Wegovy, fell victim to 'compounding' - a practice in the US that allows pharmacies to produce replicas.

The company has seen sales hit by alternative compounded versions of its blockbuster weight-loss and diabetes drugs, particularly in the U.S.

Novo Nordisk on Wednesday managed the unusual feat of seeing its stock price rise after reducing its earnings outlook. But that’s reflective of the tough times the Danish maker of Ozempic and other weight-loss drugs has had.