The obesity drug helped people trim about two inches more off their waists than Wegovy in the first head-to-head study of the rival medicines.

A new study has found that people taking Eli Lilly's obesity drug Zepbound lost almost 50% more weight than those using Novo Nordisk's Wegovy.

At 72 weeks, participants using Zepbound saw an average weight-loss reduction of 20.2% versus 13.7% with Novo Nordisk’s own treatment, Eli Lilly said of the results presented at the European Congress on Obesity and published in the New England Journal of Medicine.