These three drugs dominate the GLP-1 weight-loss conversation but they’re often confused. Here’s the simple breakdown: Wegovy and Ozempic are the same active drug (semaglutide) at different doses for different FDA-approved uses. Mounjaro is a different drug (tirzepatide) that hits an additional receptor for stronger effect.
At-a-Glance Comparison
| Feature | Ozempic | Wegovy | Mounjaro |
|---|---|---|---|
| Active ingredient | Semaglutide | Semaglutide | Tirzepatide |
| Maker | Novo Nordisk | Novo Nordisk | Eli Lilly |
| Receptor target | GLP-1 | GLP-1 | GLP-1 + GIP |
| FDA-approved for | Type 2 diabetes | Chronic weight management | Type 2 diabetes |
| Max dose | 2 mg/week | 2.4 mg/week | 15 mg/week |
| Typical A1C reduction | 1.4 – 1.8% | N/A (non-diabetic use) | 2.0 – 2.5% |
| Typical weight loss | 8 – 12 lbs | 30 – 35 lbs | 40 – 50 lbs |
| How taken | Weekly injection | Weekly injection | Weekly injection |
| Approximate retail (monthly) | $900 – $1,200 | $1,300 – $1,400 | $1,000 – $1,200 |
Are Ozempic and Wegovy the Same Drug?
Yes, in terms of the active molecule. Both contain semaglutide. The difference is the dose strength and the FDA-approved indication. Ozempic is dosed up to 2 mg/week for type 2 diabetes; Wegovy is dosed up to 2.4 mg/week specifically for chronic weight management in adults with obesity or overweight + comorbidities.
How Does Mounjaro Compare to Wegovy for Weight Loss?
The SURMOUNT-1 trial showed tirzepatide 15 mg producing 20.9% average body weight loss over 72 weeks — substantially more than semaglutide 2.4 mg (Wegovy) which produced 14.9% in the STEP-1 trial. Eli Lilly’s tirzepatide for chronic weight management (branded Zepbound) received FDA approval in late 2023 for the weight-loss indication.
Which Should You Ask About?
- For type 2 diabetes only: Ozempic or Mounjaro — Mounjaro produces more A1C reduction
- For weight loss without diabetes: Wegovy or Zepbound — Zepbound produces more weight loss
- For both diabetes and weight: Mounjaro (or Ozempic, slightly less weight effect)
See our deeper Ozempic vs. Mounjaro head-to-head for more, or our GLP-1 pillar guide for the full class overview.
