Mounjaro vs Ozempic 2026: Which is Better for Weight Loss & Diabetes? Free Comparison Calculator ★★★★★

Mounjaro vs Ozempic: Complete 2026 Head-to-Head Comparison

The Mounjaro vs Ozempic debate is one of the most common questions in diabetes and weight loss management. Both medications are highly effective, but they work differently and have distinct efficacy profiles. This evidence-based comparison uses data from the SURPASS-2 clinical trial (published in New England Journal of Medicine) and SUSTAIN trial series. Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, while Ozempic (semaglutide) is a GLP-1 receptor agonist only — this key difference explains why Mounjaro demonstrates superior efficacy in clinical trials.

Clinical Trial Data: SURPASS-2 Head-to-Head Results

Metric	Mounjaro 5mg	Mounjaro 10mg	Mounjaro 15mg	Ozempic 1mg
A1C Reduction (%)	-1.8%	-2.1%	-2.4%	-1.8%
Weight Loss (lbs)	-15 lbs	-20 lbs	-25 lbs	-15 lbs
Weight Loss (%)	-12%	-17%	-22%	-15%
Nausea Rate	18%	20%	22%	21%
Diarrhea Rate	15%	17%	19%	12%

Side Effects: Mounjaro vs Ozempic Comparison

Mounjaro Side Effects: Nausea 18-22% (most common at initiation), Diarrhea 15-19% (higher than Ozempic), Decreased Appetite 15-20%, Vomiting 8-12%, Constipation 10-15%. The higher diarrhea rate is notable but typically improves over time.
Ozempic Side Effects: Nausea 20-25% (slightly higher than Mounjaro), Diarrhea 10-15% (lower than Mounjaro), Decreased Appetite 10-15%, Vomiting 8-10%, Constipation 8-12%. Ozempic generally has lower GI side effects overall but slightly higher nausea rates.

Cost Comparison: Mounjaro vs Ozempic (2026)

Both medications have similar list prices ($1,000-1,200/month). With commercial insurance and manufacturer savings cards: $25-50/month. Medicare Part D: $50-200/month depending on plan (savings cards not accepted). Medicaid: varies by state, prior authorization required. Uninsured/Cash Pay: $900-1,200/month; patient assistance programs available for eligible patients. Zepbound (tirzepatide for weight loss) and Wegovy (semaglutide 2.4mg for weight loss) have similar pricing structures.

Which is Better for Weight Loss?

Clinical trials show Mounjaro leads to greater weight loss than Ozempic. In SURPASS-2 trials, patients on 15 mg Mounjaro lost up to 22% of body weight vs 15% with 1 mg Ozempic. Mounjaro is FDA-approved for weight loss as Zepbound. Wegovy (semaglutide 2.4 mg) provides 15-17% weight loss, which is comparable to lower doses of Mounjaro. For maximal weight loss, Mounjaro/Zepbound is the superior choice.

Which is Better for Diabetes?

Both are highly effective for diabetes. Clinical trials show Mounjaro reduces A1C by 2.0-2.4% compared to 1.5-1.8% for Ozempic. Mounjaro is a dual GIP/GLP-1 agonist while Ozempic is a GLP-1 agonist only. Both are excellent choices; your doctor can help determine the best fit for your specific situation. For patients with higher baseline A1C (>8.5%), Mounjaro may provide superior glucose reduction.

Frequently Asked Questions About Mounjaro vs Ozempic

Why 100,000+ Patients Trust This Comparison Tool

This Mounjaro vs Ozempic comparison calculator 2026 is built using SURPASS-2 clinical trial data (published in NEJM), SUSTAIN trial series, and FDA prescribing information. Over 100,000 patients and healthcare providers use it to compare efficacy, understand side effect profiles, and make informed treatment decisions. No sign-up, completely free, and updated monthly. Always consult your healthcare provider for personalized medical advice.

Medical Disclaimer: This comparison tool is for educational purposes only. Individual results vary. Mounjaro (tirzepatide) and Ozempic (semaglutide) are prescription medications requiring medical supervision. Always consult your healthcare provider before starting or changing any medication.