Can You Use Mounjaro If You Have PCOS? (October 2026)

01 · The core answer

Can you take Mounjaro with PCOS?

Yes, a PCOS diagnosis does not by itself rule you in or out. Mounjaro is licensed in the UK for weight management in adults and for type 2 diabetes, not for PCOS specifically.¹ Many women with PCOS meet the licensed weight-management criteria, and eligibility is assessed on the standard BMI criteria.¹

So the practical question is not "does my PCOS allow it?" but "do I meet the weight criteria, and is it safe for me?" A GPhC-registered prescriber answers that after reviewing your health questionnaire.

02 · Will it work?

Will Mounjaro work if I have PCOS?

Weight loss itself is a first-line recommendation for PCOS and can improve insulin resistance, cycles and symptoms.¹ Mounjaro activates GIP and GLP-1 receptors, which help regulate appetite, slow stomach emptying and improve the way the body responds to insulin.¹

Individual results vary.

03 · What next

What to do next

Mention PCOS and any fertility plans in your free online consultation. You can also read about our wider weight loss clinic.

Related guide: Can You Take Mounjaro If You Have No Gallbladder? Side Effects.

04 · Eligibility and NHS

Eligibility and NHS access

NHS access is being phased in over several years. NICE recommends Mounjaro for adults with a BMI of at least 35 plus at least one weight-related condition, and the NHS primary-care rollout began in June 2025 with the highest-need groups first (initially BMI 40+ with four or more qualifying conditions).⁴⁶ Full rollout is expected to take years, which is why many people who meet the licensed criteria choose regulated private treatment rather than waiting.

For the NHS side in more detail, see our guide on getting Mounjaro on the NHS with PCOS. Our related PCOS guide covers similar ground from another angle.

05 · What results look like

What results can you expect?

In the SURMOUNT-1 trial of 2,539 adults, people taking tirzepatide alongside diet and exercise lost on average 15% of their body weight on 5mg, 19.5% on 10mg and 20.9% on 15mg over 72 weeks, compared with 3.1% with lifestyle changes alone.² These are trial averages, and individual results vary.

Weight loss on Mounjaro is gradual by design. The first weeks on 2.5mg are an adjustment phase and losses are usually modest; most measurable progress builds from 5mg onward, month by month.¹ Think in months, not days, and judge progress by trend.

If you have lost less than 5% of your starting weight after 6 months on the highest dose you can tolerate, your prescriber will discuss whether continuing or stopping is right for you.¹

06 · Beyond the scales

Metabolic changes beyond weight

In trials, weight loss on tirzepatide came with average improvements in waist size, blood pressure, cholesterol and blood-sugar measures, and most participants with prediabetes returned to normal blood-sugar levels.² These are trial-average secondary outcomes, not promises.

Because insulin resistance is common in PCOS, these measures are relevant to many women. Is Mounjaro good for "hormonal imbalance"? It is not licensed for that; its licensed purpose is weight management, and any hormonal benefit would follow from weight loss and better insulin response.

07 · Fertility and contraception

Fertility, ovulation and contraception

Mention PCOS and any fertility plans in your consultation, because improving weight can restore ovulation.¹ If you were not ovulating regularly, you may become more fertile than you expect. Mounjaro must not be used during pregnancy, and it should be stopped at least one month before trying to conceive. If you become pregnant during treatment, stop the medicine and tell your prescriber promptly.

Mounjaro slows stomach emptying, which can reduce how well oral contraceptive pills are absorbed, so ask your prescriber what protection suits you.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 Our endometriosis guide covers a related women's health question.

08 · Early weeks and plateaus

Early weeks and plateaus

Mild nausea, altered appetite and tiredness in the first days after each injection are the commonest early effects and usually settle.¹ Some people notice appetite change in week one; others feel little until a higher dose. Both are normal.

Plateaus of a few weeks are normal as the body adapts. Review food intake honestly, protect protein and activity, check sleep and alcohol, and ask your prescriber whether a dose step-up is appropriate. A plateau is not a reason to double doses or add unlicensed products.¹

Other conditions raise similar questions, such as hypothyroidism, which is also worth mentioning to your prescriber.