Weight Loss
Semaglutide and tirzepatide are both once-weekly injectable medications prescribed for weight management, but they work through slightly different mechanisms. Semaglutide is a GLP-1 receptor agonist — it mimics a single gut hormone that slows digestion and signals fullness to the brain.
Tirzepatide goes a step further, acting on two hormone pathways at once: GLP-1 and GIP. In head-to-head clinical comparisons, this dual mechanism has been associated with somewhat greater average weight loss for many patients, though individual response varies significantly.
Side effect profiles are broadly similar between the two — nausea, mild GI upset, and appetite suppression are the most commonly reported effects, usually easing as the body adjusts to a new dose. Dosing schedules for both start low and increase gradually over several weeks.
Cost, insurance coverage, and how your body responds to each hormone pathway all factor into which medication makes more sense for you. Some patients who plateau on one medication see renewed progress after switching to the other — this is exactly the kind of decision that benefits from a real conversation with a provider rather than a one-size-fits-all answer.
If you're trying to decide between the two, the most useful next step is a consultation where a provider can review your health history, prior treatment response, and goals before recommending a starting point.