What Happens If You Miss a Mounjaro Dose?

Mounjaro (tirzepatide) is taken as a once-weekly subcutaneous injection. Because doses are spaced seven days apart, the timing of a missed dose matters — but exactly what to do varies by individual circumstance, and only your prescriber or doctor can advise you based on your full medical history.

What the patient information generally notes

The patient information leaflet (PIL) that comes with your Mounjaro pen, and the electronic Medicines Compendium (eMC) entry for tirzepatide, both include guidance on missed doses. As a general rule, the PIL describes a window within which a missed injection may be taken, and advises not to take an extra dose or double up to compensate. Always check your own leaflet first — it is the most accurate source for your specific pen and dose strength.

Missing a dose by a day or two

Many people wonder what to do if they realise they are one or two days late. Guidance in the PIL typically covers this scenario, but the specifics depend on how far past the scheduled day you are. If you are unsure whether it is appropriate to take a late injection, contact your prescriber or a pharmacist before doing anything. Do not double your next dose.

How dose titration relates to this

Mounjaro is typically started at a low dose and adjusted over time under prescriber guidance — a process known as titration. Available dose strengths commonly referenced include 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, and 15 mg. Questions about when a dose increase is appropriate, or why doses are increased at all, are separate from a missed-dose situation — but both decisions are always made by your prescriber, never independently. You can read more about the Mounjaro dose chart for a factual overview of the titration schedule, or explore Mounjaro dosing in general for broader context. If you have questions about increasing your dose after two weeks, that page covers what to consider before raising it with your prescriber.

Important safety note

If you have missed multiple doses, are unsure where you are in your schedule, or have any concerns about your medication, contact your prescriber or doctor promptly. Do not attempt to self-adjust your dose or timing without their input.

One of the clearest ways to avoid dose confusion is keeping an accurate log — and that is exactly where GLP Trackr starts. The app's dose logging feature lets you record every injection: the date, time, and dose strength, so you always know when your last shot was and can spot at a glance if something was missed.

If you do miss a dose, logging it in the app means you arrive at your next prescriber appointment with a complete, accurate record rather than trying to recall dates from memory. The Mounjaro dosing hub has further guidance on managing your schedule.

GLP Trackr also includes dose reminders — a gentle weekly nudge so your injection day does not slip past unnoticed. And because the app tracks your full journey (weight, side effects, mood, energy), your prescriber gets a richer picture of how your treatment is going, not just when doses occurred.

GLP Trackr is a tracking and journaling app; it is not a substitute for your prescriber's advice, and nothing in the app should be used to make dose decisions independently. Any question about what to do after a missed dose — or whether to adjust your schedule — should always go to your healthcare professional first.

Keep your dose history accurate and easy to share. Download GLP Trackr on the App Store or Google Play and explore it free for 7 days — no commitment needed.