Novo Nordisk's weight loss drug Wegovy could face Medicare price negotiations next. Meanwhile, Particle Health files an antitrust suit against Epic Systems.

Semaglutide, the underlying drug marketed as Ozempic and Wegovy, works by mimicking a hormone that triggers the body to feel full. When the drug interacts with a receptor in the stomach, patients feel full sooner and for a longer period of time after eating. The drug does not cause weight loss directly – instead, it makes you want to eat less.