Medication Comparison
Mounjaro vs Zepbound
Mounjaro and Zepbound are the same drug (tirzepatide) by Eli Lilly, just like Ozempic and Wegovy are both semaglutide. Mounjaro is approved for type 2 diabetes; Zepbound is approved for weight management. The medication, device, and doses are identical. The difference is labeling, insurance coverage, and the prescribing context.
| Category | Mounjaro | Zepbound |
|---|---|---|
| Brands | Mounjaro (tirzepatide) | Zepbound (tirzepatide) |
| Class | GLP-1/GIP dual agonist (diabetes) | GLP-1/GIP dual agonist (obesity) |
| Administration | Weekly injection | Weekly injection |
| Average weight loss | ~15-22% | ~22% |
| Compounded cost | $1,000-1,200/mo (brand) | $1,000-1,100/mo (brand) |
| Brand cost | $1,000-1,200/mo | $1,000-1,100/mo |
| Half-life | ~5 days | ~5 days |
| Dosing frequency | Once weekly | Once weekly |
| Key trial | SURPASS trials (A1C + weight) | SURMOUNT trials (22.5% weight loss) |
Best for Mounjaro
Patients with type 2 diabetes who will benefit from insurance coverage under the diabetes indication
Best for Zepbound
Patients without diabetes who need the FDA-approved obesity indication for insurance or clinical purposes
Mounjaro tradeoffs
Pros
- Approved for type 2 diabetes
- Better insurance coverage for diabetic patients
- Same molecule as Zepbound
Cons
- Not FDA-approved for weight loss
- Off-label for obesity
- Diabetes-focused dosing guidance
Zepbound tradeoffs
Pros
- FDA-approved for weight management
- Obesity-specific dosing and titration
- Dedicated savings programs for obesity
Cons
- Limited insurance coverage for obesity
- Same molecule as Mounjaro at higher cost
Common questions
Are Mounjaro and Zepbound the same drug?
Yes, both contain tirzepatide made by Eli Lilly. Mounjaro is approved for type 2 diabetes, while Zepbound is approved for weight management. The auto-injector, doses, and medication are identical.
Why would my doctor prescribe one over the other?
If you have type 2 diabetes, you would be prescribed Mounjaro (diabetes indication). If you are seeking weight management without diabetes, you would be prescribed Zepbound (obesity indication). This affects insurance coverage.
Can I switch between Mounjaro and Zepbound?
Since they are the same medication, switching is seamless — same dose, same schedule. Your doctor might switch you if your insurance situation changes or if you develop/resolve type 2 diabetes.
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