Mounjaro vs Zepbound
Same molecule, same ladder, same 15 mg ceiling. Unlike Ozempic and Wegovy there is no dose difference here at all — which makes coverage the only real question.
Key takeaways
- Mounjaro and Zepbound are the same drug: tirzepatide, from the same manufacturer, in the same weekly injection.
- Mounjaro is licensed for type 2 diabetes. Zepbound is licensed for weight management, and also for obstructive sleep apnoea with obesity.
- Both climb the same dose ladder to the same 15 mg maximum. Unlike Ozempic and Wegovy, there is no dose ceiling difference here.
- Because the ladder is identical, the choice between them is almost entirely about which one your plan will pay for.
- Zepbound is approved for maintenance at 5, 10 or 15 mg — more flexibility than any semaglutide product has.
One molecule, two labels
Tirzepatide is sold as Mounjaro for type 2 diabetes and as Zepbound for weight management. Same manufacturer, same molecule, same weekly injection, same dose ladder.
Tirzepatide is a dual GIP and GLP-1 receptor agonist rather than a GLP-1 agonist alone, which is what separates it from semaglutide — see semaglutide vs tirzepatide for the head-to-head trial.
What differs, and what does not
| Mounjaro | Zepbound | |
|---|---|---|
| Active ingredient | Tirzepatide — identical | |
| Licensed for | Type 2 diabetes | Weight management; also obstructive sleep apnoea with obesity |
| Dose ladder | 2.5 → 5 → 7.5 → 10 → 12.5 → 15 mg weekly — identical | |
| Maximum dose | 15 mg | 15 mg |
| Approved maintenance doses | Per diabetes management | 5, 10 or 15 mg |
| Half-life | About 5 days — identical | |
This is a simpler picture than Ozempic versus Wegovy, where the maximum doses genuinely differ. Here the ladders are the same, so a switch between the two brands is a paperwork change rather than a clinical one.
The coverage question
With the pharmacology identical, coverage is what is left to decide between them. Plans price by licensed indication, so the same person can find one covered and the other not.
That is worth checking specifically before treating cost as a reason to stop. A large share of people who discontinue are not making a clinical decision — they are responding to a price, and the alternative to stopping is sometimes just the other brand of the same molecule. See coming off Mounjaro for what stopping actually costs, and the cost calculator for the per-pound figure.
Common questions
- Is Mounjaro the same as Zepbound?
- Yes. Both are tirzepatide from the same manufacturer, with the same dose ladder to the same 15 mg maximum. They carry different licensed indications: Mounjaro for type 2 diabetes, Zepbound for weight management and for obstructive sleep apnoea with obesity.
- Is one stronger than the other?
- No. Unlike Ozempic and Wegovy, where the maximum doses differ, Mounjaro and Zepbound share an identical ladder and an identical 15 mg ceiling.
- Can I switch between them?
- Clinically it is the same molecule at the same dose, so a switch is usually straightforward — but it is still a prescribing decision, and the reason for switching is normally coverage rather than effect.
- Which is better for weight loss?
- Zepbound is the licensed weight-management product, which mostly matters for coverage and for the approved 5, 10 and 15 mg maintenance options. The molecule and the doses are the same either way.
Sources
Every figure on this page traces to one of these. Regulatory documents and peer-reviewed primary research only — see our editorial policy for what we accept as a source.
- Aronne LJ et al. Continued Treatment With Tirzepatide for Maintenance of Weight Reduction in Adults With Obesity: The SURMOUNT-4 Randomized Clinical Trial. JAMA, 2024. View source
- SURMOUNT-5: Greater Loss of Weight, Waist Circumference With Tirzepatide Than Semaglutide. American College of Cardiology journal scan of the NEJM trial, 2025. View source
- SURMOUNT-4: Weight Reversal Post Tirzepatide Withdrawal. American College of Cardiology journal scan. View source
- GLP-1 Agonists: What They Are, How They Work & Side Effects. Cleveland Clinic. View source
One timeline across a brand switch
Coverage changes should not reset your history. GLPme keeps dose, product and date on one continuous timeline. Core tracking is free.
