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Semaglutide vs Tirzepatide

Two approved drug families compared directly in SURMOUNT-5.

Bottom line: SURMOUNT-5 directly compared the two drugs over 72 weeks. Mean weight decreased by 20.2% with tirzepatide and 13.7% with semaglutide. The older 22.5% and 15% figures came from separate trials and are not a fair head-to-head comparison. [4]

Semaglutide vs Tirzepatide Comparison

SemaglutideTirzepatide
Head-to-head resultMean weight decreased by 13.7% at 72 weeks. [4]Mean weight decreased by 20.2% at 72 weeks. [4]
ProductsOzempic, Wegovy, Wegovy HD and Rybelsus have different labeled uses and instructions. [1,2]Mounjaro and Zepbound have different labeled uses and product instructions. [5]
Compounded versionsNot automatically identical or interchangeable with an approved brand. [3]Not automatically identical or interchangeable with an approved brand. [6]

Evidence

summary: SURMOUNT-5 directly compared the two drugs over 72 weeks. Mean weight decreased by 20.2% with tirzepatide and 13.7% with semaglutide. The older 22.5% and 15% figures came from separate trials and are not a fair head-to-head comparison. [4]

trials: []

Frequently Asked Questions

Can I use this page to choose a dose or switch?

No. It compares evidence and status. Use the exact approved label and prescriber plan, or a registered clinical-trial protocol if you are enrolled.

Sources

  1. U.S. Food and Drug Administration FDA Approves Higher Dose Semaglutide (Wegovy HD) , 2026. Source
  2. U.S. Food and Drug Administration Wegovy and Wegovy HD prescribing information , 2026. Source
  3. U.S. Food and Drug Administration FDA’s Concerns with Unapproved GLP-1 Drugs Used for Weight Loss , 2026. Source
  4. Jastreboff AM, et al. Tirzepatide as Compared with Semaglutide for the Treatment of Obesity N Engl J Med, 2025. PMID 40353578
  5. U.S. Food and Drug Administration Zepbound prescribing information , . Source
  6. U.S. Food and Drug Administration FDA’s Concerns with Unapproved GLP-1 Drugs Used for Weight Loss , 2026. Source

Educational evidence summary. Approved products, patient-specific compounded preparations, clinical-trial products, and research-market products are not interchangeable categories.

03 · Meet them.

04 · Side by side.

10 · What to do now.

Disclaimer

This page is a community reference, not medical advice. Content reflects what users report, not clinical recommendations. Nothing here is approved for human use unless specifically noted. Always consult a healthcare professional before starting any protocol. vialprep sells injection supplies, not compounds.

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