Semaglutide vs Tirzepatide: How They're Different
By GLP-1 Tips Editorial Team·Published August 20, 2026·1 min read
Medical disclaimer: This article is for general educational purposes and is not medical advice. It does not replace a consultation with a licensed healthcare provider. Never start, stop, or change a medication based on this content alone.
Semaglutide and tirzepatide are two of the newest options for adults who want help losing weight.
Key Takeaways
- Semaglutide is a pure GLP‑1 agonist; tirzepatide also activates GIP receptors.
- Both show strong weight‑loss results, with tirzepatide often showing slightly larger averages.
How Semaglutide and Tirzepatide Work
Both mimic gut hormones that signal fullness, slow stomach emptying, and support insulin release, given as once‑weekly injections.
Efficacy for Weight Management
STEP trials for semaglutide show about 10‑15% body‑weight loss after a year; SURMOUNT trials for tirzepatide report averages often around 15‑20%.
Safety and Side Effects
Both share digestive side effects like nausea, vomiting, diarrhea, and constipation, usually mild to moderate.
Closing Thoughts
Both semaglutide and tirzepatide represent important advances in weight‑management therapy.
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Sources
- FDA Prescribing Information
- National Institutes of Health (NIH)
- Peer‑reviewed clinical trials (STEP, SURMOUNT)