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Zepbound vs Ozempic (2026) Updated · 14d ago

Quick answer: Zepbound (tirzepatide) is FDA-approved for chronic weight management — average 22.5% weight loss at highest dose (SURMOUNT-1). Ozempic (semaglutide) is FDA-approved for type 2 diabetes — about 15% weight loss when used off-label. Both injectable weekly, similar side-effect profiles.

Clinically reviewed by Editorial Medical Review, MD, NAMS-CMP · Last updated 2026-05-25

How they work

Zepbound

Tirzepatide is a dual GIP/GLP-1 receptor agonist. Activates both incretin pathways for appetite suppression, slowed gastric emptying, and improved insulin sensitivity. Dual-agonism appears to drive superior weight loss vs single-agonist semaglutide.

Ozempic

Semaglutide is a single GLP-1 receptor agonist. Mimics endogenous GLP-1 to reduce appetite, slow gastric emptying, and increase satiety. FDA-approved only for type 2 diabetes at Ozempic-branded doses.

Available formulations

Zepbound

  • Subcutaneous injection (single-use pen), once weekly
  • Doses: 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, 15 mg
  • FDA indication: chronic weight management in adults with BMI ≥30, or BMI ≥27 with comorbidity

Ozempic

  • Subcutaneous injection (FlexTouch pen), once weekly
  • Doses: 0.25 mg, 0.5 mg, 1 mg, 2 mg
  • FDA indication: type 2 diabetes (not weight loss). Wegovy is the weight-loss-indicated semaglutide brand

Common questions(3)

Can I use Ozempic for weight loss?

Ozempic is FDA-approved only for type 2 diabetes. Some clinicians prescribe it off-label for weight loss, but Wegovy (also semaglutide) is the FDA-approved weight-loss formulation. Insurance typically denies Ozempic for weight loss without a diabetes diagnosis.

Is Zepbound better than Ozempic for weight loss?

Head-to-head SURMOUNT-5 (2024) showed tirzepatide produced 20.2% weight loss vs 13.7% for semaglutide at peak doses over 72 weeks. Tirzepatide also had similar tolerability. For weight loss specifically, current evidence favors Zepbound.

Are side effects different between Zepbound and Ozempic?

Profiles are similar — both cause nausea, vomiting, diarrhea, constipation in the first 8-12 weeks as doses titrate. Zepbound may produce more GI symptoms at the highest 15 mg dose. Both carry a boxed warning for thyroid C-cell tumors based on rodent studies.

Sources(4)

Peer-reviewed and regulatory references. External links open in new tab.