Ozempic vs Mounjaro: Which Is Right for You?
Reviewed by Sydney Duong, RD, GLPeak Clinical Lead · Last updated 2026-06-17
Quick answer: Ozempic is semaglutide, a single GLP-1 agonist. Mounjaro is tirzepatide, a dual GIP/GLP-1 agonist. Both are FDA-approved for type 2 diabetes. Mounjaro produces greater average A1C reduction and weight loss at maximum doses, but tolerability varies by patient.
Different drug classes
Ozempic activates one hormone pathway (GLP-1). Mounjaro activates two (GLP-1 and GIP). The added GIP activity appears to amplify the metabolic and appetite-suppressing effects.
Glycemic and weight outcomes
In the SURPASS-2 trial (the head-to-head trial in patients with type 2 diabetes), Mounjaro 15 mg produced an average A1C reduction of ~2.30% and ~11.2 kg weight loss versus Ozempic 1.0 mg's ~1.86% A1C reduction and ~5.7 kg weight loss over 40 weeks.
Dose ladders
Both titrate slowly to reduce GI side effects.
- Ozempic: 0.25 → 0.5 → 1.0 → 2.0 mg weekly
- Mounjaro: 2.5 → 5 → 7.5 → 10 → 12.5 → 15 mg weekly
- 4-week minimum at each step
Which to choose
Both are reasonable first-line options for type 2 diabetes. Mounjaro tends to produce more weight loss and A1C reduction on average; Ozempic has a longer real-world track record and broader insurance coverage. Your prescriber will weigh tolerability, cost, and goals.
Frequently asked questions
Is Mounjaro stronger than Ozempic?
On average, Mounjaro produces greater A1C reduction and more weight loss than Ozempic at their respective maximum doses. The dual GIP/GLP-1 mechanism is thought to be why.
Can I switch from Ozempic to Mounjaro?
Yes, with prescriber guidance. There's no direct dose conversion. Most patients restart at Mounjaro 2.5 mg for 4 weeks and titrate up.
Which has worse side effects?
Side effects are similar in type and frequency (nausea, constipation, reflux). Some patients tolerate one better than the other; trial discontinuation rates were comparable.
Are they both covered for diabetes?
Most insurance plans cover both for type 2 diabetes. Coverage for off-label weight loss without diabetes is rare for either — Wegovy or Zepbound are the on-label weight-loss versions.
References
Related GLPeak tools
Educational only — not medical advice. Consult your prescriber before changing any medication.