Mounjaro Maintenance Dose: A GP Guide

The Mounjaro "maintenance dose" is not a fixed number — it's the lowest dose that keeps working for you. For some patients that's 5mg; others need 10mg or 15mg. Getting this decision right matters twice over: clinically, because more medication than you need means more side effects for no extra benefit, and financially, because in Australia price climbs with dose. Here's how maintenance dosing actually works.

The short answer at a glance

• Titration: everyone starts at 2.5mg and steps up every four weeks as tolerated — 2.5 → 5 → 7.5 → 10 → 12.5 → 15mg.
• Maintenance: you stop climbing at the dose where results and tolerability balance — 5mg, 10mg and 15mg are all recognised maintenance doses.
• Higher isn't automatically better for you: trial averages rise with dose (~15% at 5mg, ~19.5% at 10mg, ~21% at 15mg), but plenty of individuals do their best work at the lower doses.
• Cost: staying at an effective lower dose can save thousands per year.

How the maintenance decision is made

The 2.5mg starting dose is an introduction dose, not a treatment dose — its job is letting your body adjust. From 5mg upward, each step is a genuine treatment level. The question your GP asks at each review is simple: are you still progressing at the current dose, and how are you tolerating it? If weight is moving and side effects are manageable, there is no rule that says you must keep climbing. If progress stalls for six to eight weeks and side effects are mild, stepping up is the usual move.

This is why regular reviews matter more on Mounjaro than almost any other aspect of treatment — dose decisions are individual, and the right answer changes over time. Our follow-up consultations are bulk billed precisely because this cadence shouldn't be a cost decision.

Staying lower vs pushing to 15mg

The SURMOUNT trial program showed average weight loss of roughly 15% of body weight at 5mg, 19.5% at 10mg and 21% at 15mg over 72 weeks. Those are averages across thousands of patients — individually, response varies widely, and a strong responder at 5mg can outperform an average responder at 15mg. Since each dose step also raises the monthly pharmacy cost, "lowest effective dose" is both the clinical standard and the financially sensible one.

Stepping down

Some patients who reach their goal discuss stepping down to a lower maintenance dose — trading a little pharmacological pressure for lower cost and fewer side effects, while keeping the appetite-regulation benefit. This works for some and not others; the honest way to find out is a supervised trial with a scheduled review. If you're considering stopping entirely, read our guide to coming off Mounjaro first — the regain data is worth understanding before you decide.

Frequently Asked Questions — Mounjaro maintenance dosing

What is the maintenance dose of Mounjaro?

Whichever dose maintains your results with acceptable side effects — 5mg, 10mg and 15mg are all used as ongoing maintenance doses. There is no single correct number.

Can I stay on 5mg long term?

Yes, if it's working for you. Many patients maintain on 5mg or 7.5mg. The dose only needs to rise if progress stalls and you and your GP agree the trade-off is worth it.

Do I have to reach 15mg?

No. 15mg is the maximum dose, not the target dose. The target is your result.

What if I plateau on my maintenance dose?

Plateaus are normal and don't automatically mean a dose increase — timing, habits and other factors matter. Our guide to what to check when Mounjaro seems to stop working covers the diagnostic checklist GPs actually use.

Does the maintenance dose change the injection routine?

No — it stays one injection weekly regardless of dose. Our KwikPen click chart guide covers the practical mechanics.

Due for a dose review? Book a bulk billed follow-up consultation — no referral required.

This article is general information, not personal medical advice. Dosing decisions always rest with your prescribing doctor. See the complete Mounjaro Australia guide for the full treatment picture.