Novo Nordisk on Tuesday asked the U.S. Food and Drug Administration to ban compounding pharmacies from making copycat versions of its popular weight-loss and diabetes drugs, which it said were too complex for those manufacturers to produce safely.

Novo Nordisk wants the Food and Drug Administration (FDA) to prevent compounding pharmacies from manufacturing their own versions of the company’s popular weight loss drug Wegovy and diabetes

Novo Nordisk has asked the FDA to add semaglutide to a list that would effectively block manufacturing of copycat versions of Wegovy and Ozempic.