Amgen IncMariTide's weight loss efficacy trails Eli Lilly's Zepbound and Novo Nordisk's Wegovy, and switching patients from established therapies will be difficult.
Amgen's monthly weight loss injection MariTide is advancing through six phase 3 trials, but its phase 2 data showing 12.3% to 16.2% weight loss at 52 weeks may not be enough to challenge Eli Lilly's Zepbound and Novo Nordisk's Wegovy. In a head-to-head comparison, tirzepatide led to 20.2% weight loss and semaglutide to 13.7% after 72 weeks, while MariTide has not been tested against either. Amgen's next major weight loss catalyst is Maritime-1, its 3,501-patient obesity trial, which reaches primary completion on Jan. 21, 2027, with the type 2 diabetes study landing the same day. Meanwhile, Eli Lilly's oral drug orforglipron was approved on April 1, and Novo Nordisk has already filed for approval with its candidate CagriSema in December 2025. Amgen's commercial chief acknowledged the company expects to be the best monthly or less frequently dosed agent, but without superior efficacy data, switching patients from established therapies will be difficult.
Amgen IncMariTide's weight loss efficacy trails Eli Lilly's Zepbound and Novo Nordisk's Wegovy, and switching patients from established therapies will be difficult.
Eli Lilly and CompanyEli Lilly's Zepbound shows superior weight loss (20.2%) vs Amgen's MariTide, and its oral drug orforglipron was approved, strengthening its competitive position.
Novo Nordisk A/SNovo Nordisk's Wegovy shows better efficacy than Amgen's MariTide, and its candidate CagriSema has been filed for approval, reinforcing its lead.