The Biden administration moved Friday to negotiate the prices Medicare pays for the blockbuster weight-loss drugs Ozempic and Wegovy, medications costing the massive government health program billions of dollars a year.

Ozempic and Wegovy, the blockbuster but costly GLP-1 drugs often used for weight loss, are among the 15 medications that will be subject to the next round of Medicare price negotiations, the Biden administration announced Friday.

The U.S. government named 15 drugs that will be subject to the second round of price negotiations by Medicare, including Ozempic and Wegovy, the drugs at the center of the weight-loss craze. The Biden administration said the drugs account for $41 billion in annual Medicare spending,