Tirzepatide Dosing & Titration Schedule: 2.5 to 15 mg (2026)

The standard titration schedule

Doses increase only if the current dose is tolerated. A clinician may hold or slow the schedule. Source: Zepbound / Mounjaro prescribing information.

Why the steps exist

Gastrointestinal side effects track closely with dose escalation, so the gradual schedule exists to let the body adapt. Moving up too quickly tends to worsen nausea and vomiting without improving results. If a step is poorly tolerated, clinicians often extend it or step back down before trying again.

What each dose delivers

Choosing a maintenance dose

There is no universal "best" dose. Some people reach their goals at 5 or 10 mg with fewer side effects; others benefit from 15 mg. The aim is the lowest dose that achieves your goals while staying tolerable, decided with your clinician — not automatically the maximum.

Missed doses and practical tips

If you miss a weekly dose, prescribing information generally allows taking it within a few days, then resuming your regular schedule; otherwise skip and continue. Never double up to catch up. Store the medication as directed, rotate injection sites, and keep a consistent weekly day. For compounded products supplied as vials, confirm concentration so you draw the correct dose — a frequent source of error.

Compounded dosing cautions

FDA-approved tirzepatide comes in fixed-dose pens; compounded tirzepatide often ships as multi-dose vials requiring you to measure units, which introduces dosing-error risk. If you use a compounded product, have your provider confirm the concentration and walk through exact measurement. See our compounded dosage guide and side-effects data.

Switching doses or products

Dose changes are common and usually straightforward, but they are not always a simple swap. If side effects force a step back, that is a normal part of finding your maintenance dose, not a failure. Switching between tirzepatide and another GLP-1 is also common, but doses are not interchangeable across molecules, so a clinician should map an appropriate starting dose and titration rather than transferring your old dose directly. Never combine two GLP-1 products at once. And if you move between an FDA-approved pen and a compounded vial, re-confirm the concentration and exact measurement, because the delivery format — and the room for dosing error — changes completely.

Frequently asked questions

What is the tirzepatide dosing schedule?

Start at 2.5 mg weekly for four weeks, then increase by 2.5 mg every four weeks as tolerated, up to a maximum of 15 mg weekly.

Is 2.5 mg a treatment dose?

No. The 2.5 mg starter dose is for building tolerance; the first therapeutic dose is 5 mg. Judging results at 2.5 mg is premature.

What is the best maintenance dose?

The lowest dose that meets your goals while staying tolerable — often 5, 10, or 15 mg. Higher doses gave more average loss in trials but are not right for everyone.

What if I miss a dose?

Prescribing information generally allows taking a missed weekly dose within a few days, then resuming schedule; otherwise skip it. Never double up. Confirm specifics with your clinician.