Who Cannot Take Mounjaro? Contraindications and Cautions Explained

According to the medicine's official prescribing information (available via the electronic Medicines Compendium), there are absolute contraindications — situations where Mounjaro must not be used — as well as a number of precautionary circumstances that require careful clinical assessment.

Absolute contraindications

• Hypersensitivity to tirzepatide or any of the medicine's inactive ingredients. Anyone who has had a serious allergic reaction to a previous dose should not continue and should contact their healthcare professional promptly.
• Pregnancy. Mounjaro is not recommended during pregnancy. Anyone who becomes pregnant while taking it should discuss stopping with their prescriber without delay. Effective contraception is typically advised for women of childbearing potential.

Situations requiring extra caution or specialist assessment

• Personal or family history of medullary thyroid carcinoma (MTC). GLP-1 receptor agonists have been associated with thyroid C-cell changes in animal studies; people with a history of MTC or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2) are generally not prescribed Mounjaro.
• History of pancreatitis. Because tirzepatide may be associated with pancreatitis, a history of this condition is an important factor for prescribers to weigh carefully.
• Severe gastrointestinal disease. People with serious conditions affecting stomach-emptying or gut motility may not be suitable candidates.
• Severe kidney or liver impairment. While mild-to-moderate impairment may be manageable, severe impairment warrants close prescriber review.
• Type 1 diabetes. Mounjaro is not indicated for type 1 diabetes management and should not be used as a substitute for insulin.
• Under 18 years of age. Mounjaro is not currently authorised for use in people under 18; suitability must be determined by a specialist prescriber.
• Breastfeeding. It is not known whether tirzepatide passes into breast milk, so breastfeeding while taking Mounjaro is not recommended without specific guidance from a healthcare professional.

This list is not exhaustive. Your prescriber considers your complete medical history, current medications, and individual circumstances — factors that a general information page cannot account for. If you have questions about whether Mounjaro is right for you given a specific condition, that conversation belongs with your own doctor or prescriber.

For broader guidance on taking Mounjaro, the Mounjaro information hub covers many aspects of the treatment journey. You may also find it helpful to read about who should not take Mounjaro for a closer look at precautionary groups, and about choosing the best day to take Mounjaro if you are already prescribed and thinking about your weekly schedule.

For people who are already prescribed Mounjaro, staying on top of how you feel over time — especially when it comes to new or changing symptoms — is genuinely valuable. GLP Trackr's side-effect and symptom tracker lets you log anything you notice after each dose: nausea, dizziness, injection-site reactions, or anything else that feels worth recording. Patterns that build up in your log can be far more useful to bring to a prescriber appointment than a vague recollection of "feeling off last week."

The app also includes a doctor report feature that pulls together your logged data — doses, symptoms, weight, wellbeing — into a clear summary you can share with your healthcare team. If you ever have concerns about whether Mounjaro continues to be appropriate for you, having a detailed record makes those conversations much easier.

If you are adjusting your injection schedule — for example, you have been wondering whether you can take Mounjaro a couple of days early — the dose-logging and reminder features help you keep track of exactly when each shot was taken, so nothing gets lost.

Important: GLP Trackr is a tracking and journaling tool — it does not provide medical advice, and nothing in the app or on this page replaces the guidance of your prescriber or doctor. If you experience any symptoms that concern you, particularly anything severe or persistent, contact your healthcare professional promptly. Any decision about whether to continue, pause, or change your medication should be made with your prescriber, not independently.

Log your doses, track how you feel, and bring clearer information to every appointment. GLP Trackr is available free on the App Store and Google Play — start your 7-day free trial and see how much easier it is to stay on top of your journey.