Comparisons Mounjaro vs Zepbound

Mounjaro vs Zepbound

Side-by-side comparison of weight loss results, pricing, side effects, and clinical data.

Mounjaro

~15-22%

Zepbound

~22%

Head-to-Head Comparison

Metric
MounjaroMounjaro (tirzepatide)
ZepboundZepbound (tirzepatide)
Drug Class
GLP-1/GIP dual agonist (diabetes)
GLP-1/GIP dual agonist (obesity)
Administration
Weekly injection
Weekly injection
Dosing
Once weekly
Once weekly
Avg. Weight Loss
~15-22%
~22%
Half-Life
~5 days
~5 days
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
FDA Approved
2022
2023
Key Trial
SURPASS trials (A1C + weight)
SURMOUNT trials (22.5% weight loss)

Side Effects Comparison

Mounjaro

  • Nausea
  • Diarrhea
  • Decreased appetite

Zepbound

  • Nausea
  • Diarrhea
  • Decreased appetite

Pros & Cons

Mounjaro

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

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

The Verdict

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.

No head-to-head needed — identical drug. SURPASS trials (diabetes) and SURMOUNT trials (obesity) both used tirzepatide.

Which Is Right for You?

Choose Mounjaro if...

Patients with type 2 diabetes who will benefit from insurance coverage under the diabetes indication

Choose Zepbound if...

Patients without diabetes who need the FDA-approved obesity indication for insurance or clinical purposes

Frequently Asked 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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