Most patients begin noticing abdominal changes around the 2-week mark, particularly a shift in how the midsection feels
The peptide earned its name from early research demonstrating protective effects across multiple organ systems
The shelf life varies by specific product, and all medications should be used before the expiration date printed on the packaging when stored according to the manufacturer's instructions: Semaglutide (Ozempic, Wegovy) : Unopened pens may be stored in the refrigerator until the expiration date on the label Dulaglutide (Trulicity) : Remains stable when refrigerated until the printed expiration date Liraglutide (Victoza, Saxenda) : Maintains potency when refrigerated continuously until expiration Tirzepatide (Mounjaro, Zepbound) : Stable under refrigeration until the manufacturer's expiration date Exenatide (Byetta, Bydureon BCise) : Requires refrigeration and remains effective until expiration when stored properly It is important to note that permitted room-temperature storage periods as specified in the prescribing information do not invalidate the expiration date

After being thoroughly tested through multiple clinical trials for safety and efficacy, manufacturers of FDA-approved drugs are inspected and continuously monitored to ensure theyre meeting whats called current good manufacturing practices, or CGMP, says Sklamberg
Lopez PD, Bhatia K, Bohra C, et al
For a direct comparison of these two peptides beyond reconstitution, see the complete semaglutide versus tirzepatide analysis