Tirzepatide reduces weight more than semaglutide in head-to-head trial of patients without diabetes

The findings were robust, said endocrinologist Professor Gary Wittert.

Tirzepatide leads to greater weight loss than semaglutide in adults with obesity but without type 2 diabetes, a head-to-head trial suggests.

Published in the New England Journal of Medicine, the SURMOUNT-5 trial involved 751 participants randomly assigned to the maximum tolerated dose of tirzepatide (10mg or 15mg) or semaglutide (1.7mg or 2.4mg) and treated for 72 weeks.

Participants also received lifestyle counselling.

The open-label trial, funded by tirzepatide maker Eli Lilly, found average weight loss with tirzepatide was 20.2% of body weight, or 22.8kg.