Is Mounjaro Safe for Pregnant Women? (October 2026)

01 · The answer

Can pregnant women take Mounjaro?

No. Mounjaro must not be used during pregnancy, and it should be stopped at least one month before trying to conceive.¹ Tirzepatide is the same medicine whatever the name on the box, so the answer to "is tirzepatide safe for pregnant women" is identical.

Mounjaro is licensed for weight management and type 2 diabetes in adults. Neither use justifies continuing through a pregnancy. If your weight or blood sugar needs managing while pregnant, speak to your GP, midwife or specialist team.

02 · Your next step

What to do depending on your situation

For a longer answer on the same question, see our guide on whether Mounjaro is safe when pregnant.

03 · Stopping before conception

Stopping Mounjaro before trying to conceive

The instruction is clear: Mounjaro should be stopped at least one month before trying to conceive.¹ Plan this with your prescriber rather than stopping on your own date and guessing.

Tirzepatide has a half-life of about five days, so after a final dose it takes roughly four to five weeks to clear the system. There is no way to speed this up, and nothing needs doing while it clears.¹ That is the reason the advice builds in a gap before conception.

It also helps to think about what happens after you stop. The medicine works alongside a reduced-calorie diet and increased physical activity, not instead of them.¹³ Ask your prescriber and your GP how to support your weight and nutrition during the gap and into pregnancy.

04 · Contraception on Mounjaro

Contraception and the risk of an unplanned pregnancy

Mounjaro slows stomach emptying, which can reduce how well oral contraceptive pills are absorbed.⁷

The SmPC advises switching to a non-oral method, or adding a barrier method (such as condoms), for 4 weeks after starting Mounjaro and for 4 weeks after each dose increase.¹ This applies to the pill only. Implants, coils and injections are unaffected.¹

In practice, the dose-increase rule means the protection window comes round again at every step up the ladder from 2.5mg towards a maintenance dose. Mark each step in your diary, or use the free GLPTrackr companion app to keep track of your dose dates.

05 · If you become pregnant

What happens if you become pregnant on Mounjaro

Stop the medicine and tell your prescriber promptly.¹³

Beyond that, take these practical steps:

• Do not inject another dose while you wait for an appointment.
• Contact your GP or midwife so antenatal care starts early, and tell them which medicine you took and when your last dose was.
• Tell the prescribing team that reviewed your treatment, so your record is updated and no further supply is arranged.
• Consider reporting the exposure through the MHRA Yellow Card scheme, which collects reports about medicines.¹⁹

Our page on women getting pregnant on Mounjaro goes into more detail.

06 · Fertility and PCOS

Fertility, ovulation and PCOS

Mounjaro is not licensed specifically for PCOS, but many women with PCOS meet the licensed weight-management criteria, and weight loss itself is a first-line recommendation that can improve insulin resistance, cycles and symptoms.

Eligibility is assessed on the standard BMI criteria. Mention PCOS and any fertility plans in your consultation, because improving weight can restore ovulation.

This is why the contraception and pregnancy guidance matters so much. Improving weight can restore ovulation, so the possibility of conceiving may rise even if you had been told it was unlikely. Do not assume you cannot get pregnant. If you have PCOS, our guide to Mounjaro safety with PCOS covers the wider picture.

07 · Breastfeeding

Breastfeeding and Mounjaro

Breastfeeding is treated separately from pregnancy. Current prescribing information indicates minimal transfer of tirzepatide into breast milk; discuss breastfeeding with your prescriber so the decision reflects your circumstances.

08 · Who should not take it

Who else should not take Mounjaro

Mounjaro is not suitable for everyone. You should not take it if you are allergic to tirzepatide or any of its ingredients, and it should not be used during pregnancy or while trying to conceive.

Your prescriber will take extra care, or may recommend against treatment, if you have a history of pancreatitis, severe gut or digestive disease, diabetic retinopathy, or gallbladder problems. Always share your full medical history and medicine list during consultation.

As a precaution, tell your prescriber if you or a close relative have had medullary thyroid cancer or the inherited condition MEN 2. They will weigh this in your assessment.

Serious side effects are uncommon but need urgent attention. Seek immediate medical help for: severe, persistent stomach pain that may spread to your back, with or without vomiting (possible pancreatitis); pain in the upper right abdomen, fever or yellowing of skin/eyes (possible gallbladder problems); or signs of a severe allergic reaction such as swelling of the face or throat and difficulty breathing.

09 · Related medicines questions

Questions about other medicines in pregnancy

If you take insulin or a sulfonylurea alongside Mounjaro, watch for low blood sugar (shakiness, sweating, confusion), because your prescriber may need to adjust those medicines. If you are pregnant or planning to be, your diabetes team should lead all of these decisions.

Check each product's own patient leaflet and speak to your prescriber.

10 · Getting help and support

Getting help and reporting concerns

If you are unsure whether you could be pregnant, start with a test and a conversation with your GP, pharmacist or prescriber. You do not need to wait for a missed period to ask questions.

For women considering treatment in the future, our overview of Mounjaro for women and the benefits for women explain who it may suit, and tirzepatide online for women explains how a consultation works.

This page is information, not a substitute for medical advice.