Mounjaro dosage: chart, schedule, and maximum dose

Mounjaro dosage chart

Everyone starts at 2.5 mg once weekly and climbs the same ladder — up to a maximum of 15 mg, in steps at least 4 weeks apart. Per the FDA label:

Mounjaro titration schedule, per the FDA label. Your prescriber sets your actual pace.
Dose	When	Notes
2.5 mg	Weeks 1–4	Starting dose — helps your body adjust; not intended for blood-sugar control
5 mg	Weeks 5–8	First maintenance option
7.5–10 mg	From week 9	Stepped up in 2.5 mg increments, at least 4 weeks apart
12.5–15 mg	Later months	15 mg is the maximum weekly dose

If the chart looks familiar, it should: it’s identical to Zepbound’s, because the two are the same molecule sold under different labels. The slow ramp isn’t bureaucracy — it’s the mechanism for outrunning the GI side effects that peak with every increase.

The starting dose: 2.5 mg is for adjustment, not results

Per the label, 2.5 mg is a starting dose — it isn’t intended for blood-sugar control. It exists to let your gut acclimate before the working doses arrive.

The practical implication: don’t judge Mounjaro by week 3. If your glucose numbers barely move and the appetite effect feels faint at 2.5 mg, that’s the dose doing exactly what it’s for. The label holds you there four weeks, and most side effects in this window are the mild, manageable kind — it’s the increases that bring the replay.

Maintenance and maximum dose: how high do you go?

5 mg is the first maintenance option, and from there it’s 2.5 mg increments, at least 4 weeks apart, topping out at 15 mg weekly. Higher doses did more in trials — the label leaves your stopping point to you and your prescriber:

Blood sugar: across the SURPASS program, A1C fell by more than 2 percentage points at the higher doses — reductions no other diabetes injectable had matched.
Weight: in SURPASS-2, adults with type 2 diabetes lost roughly 12–25 lb over 40 weeks depending on dose — about 25 lb (~12% of body weight) at 15 mg (⚠ verify per-dose split).

“Maximum” isn’t the goal, though. The right dose is where your numbers and your tolerability meet, and parking at 5 or 7.5 mg long-term is common and label-sanctioned. One cost note while you’re here: every strength lists at the same price, so climbing the ladder doesn’t change what you pay (⚠ verify flat pricing).

Missed a dose? The 4-day rule

Per the label: take a missed dose within 4 days (96 hours) of when it was due. Past 4 days, skip it entirely and take your next dose on the regular day. Never take two doses within a few days of each other to “catch up” (⚠ verify rule wording).

Want to move your injection day permanently? That’s allowed, as long as at least 3 days (72 hours) separate the last dose from the next (⚠ verify). Miss more than a couple of weeks and your prescriber may restart you at a lower dose to re-acclimate — don’t resume 15 mg cold after a month off.

KwikPen vs single-dose pen dosing

Mounjaro comes in two devices, and which one you get mostly depends on where you live (⚠ verify formats and availability by market):

Single-dose pen (US standard) — a push-button auto-injector; one pen is one weekly dose, pre-filled at your prescribed strength, no needle handling.
KwikPen (some markets) — a multi-dose pen holding four weekly doses of a single strength, with a screw-on pen needle for each injection.

The dosing itself doesn’t change — same ladder, same weekly rhythm, same strengths. What changes is handling: the KwikPen means dialing and attaching needles (have a pharmacist walk you through the first one), plus one pen lasting a month instead of a week. Either way, storage rules are identical: refrigerated, with up to 21 days at room temperature below 86°F.

Mounjaro dosage for weight loss

Here’s the honest version: there is no approved Mounjaro dose for weight loss, because Mounjaro isn’t approved for weight loss — its label is type 2 diabetes. When tirzepatide was trialed for obesity, the SURMOUNT-1 study used this exact same 2.5-to-15 mg ladder, run under the Zepbound label — averaging 20.9% of body weight (~48 lb) over 72 weeks at the top dose.

In practice, off-label prescribing for weight is legal and common, and prescribers use the same titration you see in the chart above (⚠ verify framing). But if weight is the goal, the weight-labeled version of this molecule exists, has its own dosing page, and is the one insurance will actually consider covering — see the Zepbound dosage guide and the coverage story for why the label matters more than the milligrams.

Mounjaro: the complete guide What it is, how well it works, what it costs, and how to get it

Common questions about Mounjaro dosage

How long do you stay on each Mounjaro dose?

At least 4 weeks per step, per the label — that's the minimum, not a deadline. Staying longer at a dose that's working, or that your stomach is still negotiating with, is common and label-sanctioned.

Can I just stay on 5 mg of Mounjaro?

Yes. 5 mg is a maintenance dose in its own right, not a waystation — if your blood sugar (and weight) goals are met there, nothing in the label forces an escalation. Plenty of people park at 5 or 7.5 mg indefinitely.

What's the best day of the week to take Mounjaro?

Whichever one you'll remember — the label doesn't care, only consistency does. Many people pick a day where a sluggish next-day is manageable. You can change your day later, as long as at least 3 days (72 hours) separate two doses (⚠ verify).

How do Mounjaro doses convert to Zepbound doses?

One to one — same molecule, same strengths, same schedule (⚠ verify), so providers typically switch dose-for-dose with no re-titration. What changes is the label and, with it, what your insurance will cover.

Mounjaro vs Zepbound

What if side effects spike after a dose increase?

The standard play is to wait it out for a couple of weeks — increase-week nausea usually fades — and if it doesn't, your prescriber can hold you at the current dose longer or step back down (⚠ verify down-titration framing). Pushing through severe symptoms isn't the assignment.

Managing Mounjaro side effects

Does Mounjaro need to be refrigerated?

Yes — store it at 36–46°F. A pen can sit at room temperature below 86°F for up to 21 days; after that it should be discarded (⚠ verify window). Letting the pen warm up a few minutes before injecting is fine and stings less.

Sources

Every claim on this page traces to primary literature or FDA labeling — browse the full evidence library.

This page is for informational purposes only and isn't medical advice. Talk to a licensed healthcare provider about your situation before starting, stopping, or changing any medication. See our medical disclaimer and editorial policy.

Written by the GLP Index editorial team · Updated July 16, 2026 · How we source