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Mounjaro vs Ozempic: Which Is Better for Weight Loss and Diabetes?

Part of Weight Loss Drug Comparison Index.

Mounjaro vs Ozempic: Which Is Better for Weight Loss and Diabetes?

Mounjaro produced greater average weight loss and HbA1c reductions than injected Ozempic 1 mg in SURPASS-2, a 40-week trial in adults with type 2 diabetes taking metformin. It did not compare Mounjaro with Ozempic 2 mg or Ozempic tablets.
Both brands treat type 2 diabetes. Their active ingredients are also sold as Zepbound and Wegovy for weight management. The best choice also depends on heart and kidney disease, side effects, formulation and coverage.

Side-by-Side Comparison

MounjaroOzempic
Generic nameTirzepatideSemaglutide
ManufacturerEli LillyNovo Nordisk
FDA approved forType 2 diabetes; cardiovascular risk reduction in specified adults with T2DType 2 diabetes; cardiovascular and kidney indications depend on formulation
Weight loss brandZepbound (approved 2023)Wegovy (approved 2021)
MechanismDual agonist: GLP-1 + GIPSingle agonist: GLP-1
Injection doses2.5, 5, 7.5, 10, 12.5, 15 mg0.25, 0.5, 1, 2 mg
AdministrationOnce-weekly injectionWeekly injection or daily tablet
Oral optionNoYes: Ozempic tablets; Rybelsus is another oral semaglutide brand

What Each Drug Is

Mounjaro (Tirzepatide)

Mounjaro is a dual GLP-1/GIP receptor agonist — the first drug in its class to target two incretin hormones simultaneously. It was FDA-approved for type 2 diabetes in 2022. The same molecule is sold as Zepbound specifically for weight loss.

Ozempic (Semaglutide)

Ozempic contains semaglutide, a GLP-1 receptor agonist. It is available as a weekly injection and as daily tablets for type 2 diabetes. Rybelsus is another oral semaglutide product; its tablet strengths are not interchangeable with Ozempic tablets milligram for milligram. Wegovy is the semaglutide brand used for weight management.
For a detailed molecular comparison, see Tirzepatide vs Semaglutide.

Weight Loss Results

SURPASS-2 randomized 1,879 adults with type 2 diabetes inadequately controlled on metformin. The current Mounjaro label reports these adjusted mean changes at 40 weeks:

TreatmentMean weight change
Mounjaro 5 mg weekly−7.6 kg
Mounjaro 10 mg weekly−9.3 kg
Mounjaro 15 mg weekly−11.2 kg
Ozempic 1 mg weekly−5.7 kg
These are kilograms, not percentages. They come from the same trial and analysis. Obesity studies of Zepbound or Wegovy enrolled different populations and should not be mixed into this diabetes comparison as though they tested the same treatments under the same conditions.

Diabetes Management

The same label analysis reports HbA1c reductions of 2.0, 2.2 and 2.3 percentage points with Mounjaro 5, 10 and 15 mg, respectively, versus 1.9 percentage points with Ozempic 1 mg. HbA1c below 7% was reached by 82%, 86% and 86%, versus 79%.

Glucose and weight results are only part of treatment selection. Mounjaro also has an FDA indication to reduce major cardiovascular events in adults with type 2 diabetes at high risk. Ozempic injection has cardiovascular and kidney risk-reduction indications for specified adults with type 2 diabetes; the tablet label has a cardiovascular indication but does not list the injection’s kidney indication. These distinctions can matter more than the largest weight-loss number.

Their Weight Loss Branded Versions

Both drugs have FDA-approved weight-loss-specific brands:

  • Mounjaro → Zepbound (tirzepatide for obesity, approved November 2023)
  • Ozempic → Wegovy (semaglutide for obesity, approved June 2021)
The active ingredient is the same — the difference is the indication, dosing, and insurance coverage. For a detailed comparison of the weight loss versions, see Zepbound vs Wegovy.

Side Effects

Both can cause nausea, vomiting, diarrhea and other gastrointestinal symptoms. Neither is a guaranteed easier option to tolerate. Their labels also warn about pancreatitis, gallbladder disease and dehydration-related kidney injury. Low blood sugar risk increases when combined with insulin or a sulfonylurea.

Both are contraindicated with a personal or family history of medullary thyroid carcinoma or MEN2. The boxed warning is based on rodent tumors; whether these medicines cause those tumors in humans is unknown. Mounjaro can reduce oral contraceptive effectiveness around treatment initiation and dose increases, so its label specifies additional contraceptive precautions.

Cost

Compare the pharmacy price for your prescribed product and insurance plan. A list price is not a personal quote, and Zepbound offers cannot be assumed to apply to Mounjaro.
Check the current Mounjaro savings terms and Ozempic cost and coverage options. Eligibility, insurance status, formulation and programme limits affect the amount. Ask your insurer whether prior authorization or a preferred alternative applies; this page cannot establish which brand your plan covers more broadly.

The Next Generation: Retatrutide

Retatrutide is an investigational GLP-1/GIP/glucagon triple agonist. Its phase 3 results are promising, but separate trials cannot establish superiority over Mounjaro or Ozempic. It is not FDA-approved, and a projected approval year is not a confirmed launch date.
Learn more: Retatrutide vs Mounjaro | What Is Retatrutide?

Frequently Asked Questions

Is Mounjaro better than Ozempic for weight loss?

Mounjaro produced greater average weight loss than injected Ozempic 1 mg in adults with type 2 diabetes taking metformin. SURPASS-2 did not compare the maximum doses of both brands: Ozempic injection can be prescribed at 2 mg. For obesity treatment, see the separate Zepbound vs Wegovy comparison.

Is Mounjaro better than Ozempic for type 2 diabetes?

SURPASS-2 favored Mounjaro for glucose lowering and weight loss against Ozempic 1 mg. That does not make it the best choice for every person: cardiovascular and kidney indications, other medicines, tolerability and coverage also matter.

Can I take Mounjaro or Ozempic for weight loss without diabetes?

Both have weight-loss-specific brands: Mounjaro is sold as Zepbound and Ozempic as Wegovy for chronic weight management. These are FDA-approved for weight loss in adults with BMI 30+ (or 27+ with weight-related conditions). Some doctors prescribe Mounjaro or Ozempic off-label for weight loss.

How much does Mounjaro cost vs Ozempic?

Your cost depends on the prescribed formulation, insurance and savings eligibility. Check each manufacturer’s current terms and get a pharmacy quote; a Zepbound cash offer is not a Mounjaro price.

Does Ozempic come in a pill?

Yes. Ozempic tablets are a daily semaglutide option for type 2 diabetes. Rybelsus is another oral semaglutide brand. Their tablet strengths are not interchangeable milligram for milligram, and both require fasting administration. Mounjaro remains an injection.

Sources

How we keep this honest
What this is
Educational information, not medical advice. It reports published research — it doesn’t recommend that you use, obtain, or supply anything.
Regulatory status
Mounjaro and Ozempic are FDA-approved medicines. Their indications and dosing depend on the product and formulation; trial comparisons do not make them interchangeable.
Our standard
Every claim traces to a primary source. We label the strength of evidence and flag estimates as estimates — never as clinical fact.
No commercial ties
We don’t sell, supply, or link to suppliers of any medicine, and aren’t affiliated with any manufacturer.

Do not make decisions about your health without consulting a qualified healthcare provider. For trial enrolment, see ClinicalTrials.gov. More on how we review.

Grounded in primary sources
NEJMThe LancetJAMAFDAClinicalTrials.gov

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