Need a New Wegovy Day? Read This Before Switching How to Inject Wegovy Does Zepbound Need To Be Refrigerated? Storing Your Zepbound Most of Lilly's Mounjaro and Zepbound doses in limited supply, FDA says Reuters GLP 1 medications like semaglutide (Ozempic) and tirzepatide (Mounjaro) have traditionally been used to treat diabetes. They work by mimicking a natural hormone called GLP 1, which helps regulate blood sugar levels and appetite.