On Friday, the FDA granted accelerated approval to Novo Nordisk’s Wegovy for the treatment of metabolic-associated steatohepatitis (MASH) in adults with moderate-to-advanced fibrosis but without cirrhosis.
The once-weekly 2.4 mg semaglutide subcutaneous injection is given in conjunction with a reduced calorie diet and increased physical activity.
Among people living with overweight or obesity globally, 1 in 3 also have MASH.
The accelerated approval was based on part-one results from the ongoing two-part, phase-3 ESSENCE trial, in which Wegovy demonstrated a significant improvement in liver fibrosis with no worsening of steatohepatitis, as well as resolution of steatohepatitis with no worsening of liver fibrosis, compared with placebo at week 72. Those results were published online in April in The New England Journal of Medicine.
For the trial, 800 participants were randomly assigned to either Wegovy (534 participants) or placebo (266 participants) in addition to lifestyle changes. The mean age was 56 years and the mean BMI was 34. Most patients were white individuals (67.5%) and women (57.1%), and 55.9% of the patients had type 2 diabetes; 250 patients (31.3%) had stage II fibrosis and 550 (68.8%) had stage III fibrosis. Participants were on stable doses of lipid-lowering, glucose-management, and weight-loss medications.
At week 72, the first primary endpoint showed 63% of the 534 people treated with Wegovy achieved resolution of steatohepatitis and no worsening of liver fibrosis compared with 34% of 266 individuals treated with placebo — a statistically significant difference.
The second primary endpoint showed 37% of people treated with Wegovy achieved improvement in liver fibrosis and no worsening of steatohepatitis compared with 22% of those treated with placebo, also a significant difference.
A confirmatory secondary endpoint at week 72 showed 33% of patients treated with Wegovy achieved both resolution of steatohepatitis and improvement in liver fibrosis compared with 16% of those treated with placebo — a statistically significant difference in response rate of 17%.
In addition, 83.5% of the patients in the semaglutide group maintained the target dose of 2.4 mg until week 72.
Wegovy is also indicated, along with diet and physical activity, to reduce the risk for major cardiovascular events in adults with known heart disease and with either obesity or overweight. It is also indicated for adults and children aged 12 years or older with obesity, and some adults with overweight who also have weight-related medical problems, to help them lose excess body weight and keep the weight off.
What’s Next for Wegovy?
In February 2025, Novo Nordisk filed for regulatory approval in the EU, followed by regulatory submission in Japan in May 2025. Also in May, the FDA accepted a filing application for oral semaglutide 25 mg.
Furthermore, “There’s an expected readout of part 2 of ESSENCE in 2029, which aims to demonstrate treatment with Wegovy lowers the risk of liver-related clinical events, compared to placebo, in patients with MASH and F2 or F3 fibrosis at week 240,” a Novo Nordisk spokesperson told Medscape Medical News.
Although the company has the technology to produce semaglutide as a pill or tablet, she said, “the US launch of oral semaglutide for obesity will be contingent on portfolio prioritization and manufacturing capacity.” The company has not yet submitted the 50 mg oral semaglutide to regulatory authorities.
“The oral form requires more active pharmaceutical ingredient (API),” she noted. “Given that we have a fixed amount of API, the injectable form enables us to treat more patients. We are currently expanding our oral and injectable production capacities globally with the aim of serving as many patients as possible. It requires time to build, install, validate, and ramp-up these production processes.”
Marilynn Larkin, MA, is an award-winning medical writer and editor whose work has appeared in numerous publications, including Medscape Medical News and its sister publication MDedge, The Lancet (where she was a contributing editor), and Reuters Health.