Websites selling compounded versions of popular weight-loss drugs from Novo Nordisk and Eli Lilly to U.S. consumers often do not inform patients of the risks associated with these medicines, according to a research letter published on Friday.

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.

The Biden administration says it will be including weight loss drugs like Ozempic and Wegovy in the next round of drug negotiations between medicare and the manufactures. Dr. Natalie Azar joins TODAY to break down what it all means.

Novo Nordisk said a higher dose of its drug Wegovy led to greater weight loss in patients during a late-stage trial, but the results fell short of the weight loss achieved with Eli Lilly's rival drug Zepbound,

Tripling the dosage of the Wegovy weight-loss drug leads to more weight loss, Novo Nordisk said Friday. The Danish drugmaker announced results from a Phase 3B trial of semaglutide at a 7.2 milligram dosage,

Novo Nordisk said patients taking a bigger dose of its blockbuster obesity drug lost more weight than those on a lower dose, without experiencing an increase in side effects.

Novo Nordisk (NVO) announced Friday that a higher-dose version of its popular obesity therapy, semaglutide, marketed as Wegovy led to 20.7% weight loss over 72 weeks compared to 17.5% weight loss achieved by regular semaglutide in a late-stage trial.