The obesity drug helped patients reduce their waist size by an extra two inches compared to those on Novo Nordisk’s Wegovy in a head-to-head study of the two drugs.

Eli Lilly & Co.’s obesity drug Zepbound helped people trim about two inches more off their waists than Novo Nordisk A/S’s Wegovy in the first head-to-head study of the rival medicines.

Eli Lilly said on Sunday its drug Zepbound was superior to Novo Nordisk's Wegovy across five weight-loss targets such as reducing waist circumference, citing data from a head-to-head trial.