Mounjaro and Pregnancy: Understanding the Risks

Based on current prescribing information, tirzepatide — the active substance in Mounjaro — is contraindicated in pregnancy. This means it should not be used during pregnancy, and prescribers will typically recommend that women of childbearing potential use effective contraception while taking it. According to the electronic Medicines Compendium (eMC) SmPC for Mounjaro, the medicine should be stopped at least two months before a planned pregnancy, though your own prescriber may advise a different timeframe based on your individual circumstances.

The reasoning is precautionary: data from human pregnancies is extremely limited, and animal studies have shown potential effects on foetal development. Given this uncertainty, the established guidance is to avoid exposure during pregnancy rather than wait for evidence of harm.

Why this topic requires careful attention

Mounjaro is sometimes prescribed alongside other medicines — including those used to manage blood sugar — and a planned or unplanned pregnancy can affect the management of several conditions at once. This makes it especially important to have a detailed conversation with your healthcare professional rather than acting independently.

If you are currently taking Mounjaro and have questions about how Mounjaro affects pregnancy planning, or are curious how pregnancy considerations differ on Wegovy (semaglutide), those pages go into more detail on each medicine. You may also find it useful to read the broader Mounjaro overview for general context about the medicine.

Contraception while on Mounjaro

Because tirzepatide slows gastric emptying, it may potentially affect how oral contraceptives are absorbed — particularly in the early weeks of treatment or after a dose increase. The eMC SmPC notes this possibility and recommends discussing contraceptive choice with your prescriber. A barrier method as a backup during this period is something many prescribers suggest, though the specifics should come from your own clinical team.

If you have concerns about other longer-term safety considerations on Mounjaro, that page covers what is currently understood about those topics.

If pregnancy is a possibility for you, keeping a clear record of your Mounjaro doses, timing, and any relevant symptoms becomes especially important — not as a substitute for clinical guidance, but to support the conversations you will need to have with your prescriber.

GLP Trackr's side-effect and symptom tracker lets you log how you are feeling day to day, including anything unusual that you want to raise at your next appointment. If you discover you are pregnant, having a clear timestamped log of your recent doses and any symptoms can help your healthcare team understand your situation quickly. The app's doctor report feature can turn your tracked data into a readable summary — something genuinely useful to bring to an urgent clinical conversation.

You can also use GLP Trackr's dose logging to maintain an accurate record of when you last injected, which may be relevant information for your prescriber when assessing next steps.

GLP Trackr is an information and tracking tool — it is not a substitute for your prescriber's advice, and nothing in the app should be used to make decisions about your medication during pregnancy. Any decision about continuing, pausing, or stopping Mounjaro must be made with your prescriber or doctor, not independently.

If you experience severe or worrying symptoms at any point — including during or after pregnancy — contact your healthcare professional promptly. You should also report any side effects through your national reporting scheme (such as the UK's Yellow Card scheme) as appropriate.

Want a clear, shareable record of your journey to bring to your next appointment? GLP Trackr is free to try for 7 days on the App Store and Google Play — download it and start logging today.