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.

A high dose of Novo Nordisk’s obesity drug Wegovy led patients to lose substantial weight in a clinical trial, but still less than what’s been seen with Zepbound.

Federal officials are targeting the blockbuster drugs as part of their ongoing initiative to lower drug costs.

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.

The White House on Friday said Novo Nordisk’s weight-loss drugs Wegovy and Ozempic were among the 15 medications picked for a round of price negotiations with Medicare. The companies do not have to negotiate, but if they don’t, they face fines or the possible end of Medicare reimbursements.

The Biden administration said Medicare will negotiate discounts with drug companies on 15 drugs prescribed to treat cancer, diabetes and asthma.

The government is expected to pay lower prices for Ozempic and Wegovy starting in 2027. The Trump administration will decide whether to expand coverage for millions of Americans.

Wegovy, the weight-loss brand of semaglutide, has a recommended maintenance dose of 2.4 mg. Novo ran the Phase III STEP UP trial to evaluate the effect of increasing the maximum dose to 7.2 mg. The trial randomized 1,407 adults with obesity, but not diabetes, to receive either 7.2 mg or 2.4 mg of semaglutide or placebo.

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,