Can you take Mounjaro or Wegovy with HRT? Learn how weight loss injections may affect HRT tablets, UK menopause guidance, and how to protect muscle and bone.
Can you take weight loss injections during the menopause or with HRT?
Yes. Mounjaro and Wegovy can be used by women who are perimenopausal or postmenopausal, including women taking hormone replacement therapy (HRT), provided they meet the usual eligibility criteria.
However, there is one important issue to be aware of.
Weight loss injections slow the emptying of the stomach, and this may reduce how well HRT taken by mouth is absorbed.
This matters most for the progestogen part of HRT, which protects the lining of the womb.
In 2025, the British Menopause Society (BMS) published guidance for clinicians on using these medicines alongside HRT. The key messages are:
- HRT delivered through the skin (patches, gel or spray) is not affected and is generally preferred
- Oral progestogens may be less well absorbed, particularly with Mounjaro (tirzepatide)
- The hormonal coil offers reliable protection for the womb lining
- Any unexpected vaginal bleeding should be reported to your GP
- Changes to HRT should be made with your GP or menopause specialist, not on your own
This guide explains the reasoning, the options, and how to look after your muscle and bone health during treatment.
Why does weight change around the menopause?
Many women notice weight gain, or a change in where weight is carried, during perimenopause and after the menopause.
Several factors are involved:
- Falling oestrogen levels change how the body stores fat, with more stored around the abdomen
- Muscle mass naturally declines with age, which lowers the number of calories the body uses at rest
- Sleep is often disrupted by night sweats and insomnia, which increases appetite and cravings
- Mood changes, stress and fatigue can affect eating and activity
- Life circumstances at this stage often leave less time for exercise and rest
Extra weight around the middle is linked with a higher risk of type 2 diabetes, high blood pressure and cardiovascular disease, so managing weight at this stage of life can have real health benefits.
Do Mounjaro and Wegovy work during the menopause?
Yes.
The clinical trials of both medicines included women across a wide range of ages, including women after the menopause, and showed substantial weight loss.
Some early observational research has suggested that postmenopausal women taking HRT may lose somewhat more weight on these medicines than those not taking HRT. This has not been confirmed in controlled trials, and HRT should not be started for the purpose of improving weight loss.
Eligibility is the same as for anyone else: generally a BMI of 30 or more, or 27 or more with a weight-related health condition, subject to clinical assessment. See Am I eligible for weight loss injections?
How might weight loss injections affect HRT?
The mechanism
Mounjaro and Wegovy slow the rate at which the stomach empties. This is part of how they make you feel full.
A slower stomach can change how quickly, and sometimes how completely, tablets and capsules are absorbed.
What is the evidence?
The clearest evidence comes from studies of the oral contraceptive pill with tirzepatide (Mounjaro), which showed a significant reduction in the level of contraceptive hormones in the blood after a single dose. This is why women using the pill for contraception are advised to take extra precautions when starting Mounjaro and after each dose increase.
There are no equivalent studies of HRT tablets. The BMS guidance is therefore based on applying the contraceptive pill data to oral HRT and on expert opinion.
For semaglutide (Wegovy), studies have not shown the same reduction in the absorption of oral contraceptives. However, because it also slows stomach emptying, the BMS advises that similar caution is reasonable.
Why does it matter?
HRT usually has two parts:
- Oestrogen, which relieves menopausal symptoms
- A progestogen, which protects the lining of the womb (endometrium)
If you still have a womb, taking oestrogen without enough progestogen can cause the womb lining to thicken, which over time increases the risk of endometrial cancer.
If an oral progestogen is not being absorbed properly, the womb lining may be less well protected.
This is particularly relevant because excess weight is itself a risk factor for endometrial cancer.
Reduced absorption of oral oestrogen is less of a safety concern, but could mean that menopausal symptoms are less well controlled.
Which types of HRT are affected?
Not affected: HRT through the skin
- Oestrogen patches
- Oestrogen gel
- Oestrogen spray
- Combined patches containing both oestrogen and a progestogen
These are absorbed directly through the skin into the bloodstream, bypassing the stomach altogether.
Transdermal oestrogen is also generally preferred for women with a higher BMI, because, unlike oestrogen tablets, it is not associated with an increased risk of blood clots.
Not affected: the hormonal coil
The 52 mg levonorgestrel intrauterine system (such as Mirena) releases progestogen directly into the womb.
The BMS describes it as the most comprehensive option for protecting the womb lining in women using these medicines. It also provides contraception.
Not affected: vaginal oestrogen
Low-dose vaginal oestrogen (pessaries, creams, gels or a ring) used for vaginal dryness and urinary symptoms acts locally and is not affected.
Potentially affected: oral HRT
- Oestrogen tablets
- Combined HRT tablets
- Oral progestogens, including micronised progesterone capsules (such as Utrogestan) taken by mouth
If you take any of these, it is worth discussing your HRT with your GP or menopause specialist before or soon after starting a weight loss injection.
What does the British Menopause Society recommend?
The BMS guidance is written for healthcare professionals, but the main points are useful for patients to understand.
For oestrogen
Transdermal oestrogen (patch, gel or spray) is preferred.
For progestogen
In order of preference, the options are:
- The hormonal coil, where suitable and acceptable
- A combined transdermal patch
- An oral progestogen, if this is your preference, with a possible dose adjustment
If you stay on an oral progestogen
The guidance suggests that clinicians consider increasing the dose of oral progestogen for four weeks after starting the weight loss medicine and after each dose increase, until a stable dose is reached.
This is a decision for your HRT prescriber. Do not change your HRT dose yourself.
Shared decision-making
The BMS acknowledges that the evidence is limited and that decisions should be made jointly between you and your clinician, taking your preferences into account.
What should you do in practice?
- Tell your weight loss prescriber that you take HRT, and which type
- Tell your GP or menopause specialist that you are starting, or have started, a weight loss injection
- Ask whether your HRT needs to be reviewed, particularly if any part of it is taken by mouth
- Do not stop HRT suddenly, and do not alter doses without advice
- Report any unexpected bleeding promptly
- Mention any return of menopausal symptoms, as this may suggest reduced absorption
Unexpected bleeding: why it matters
Any of the following should be reported to your GP:
- Bleeding after the menopause (more than 12 months after your last period) if you are not on HRT
- New, heavier or irregular bleeding on HRT, beyond the first few months after starting or changing it
- Bleeding after sex
- Bleeding that continues despite a change in your HRT
Unscheduled bleeding on HRT is common and usually has a harmless explanation. However, it can occasionally be a sign of a problem with the womb lining, so it should always be assessed.
The BMS advises clinicians to consider investigating earlier than usual in women with risk factors, such as a higher BMI.
HRT is not contraception
This catches many women out.
HRT does not prevent pregnancy.
Women in perimenopause can still conceive. Contraception is generally recommended for:
- Two years after your last period if you are under 50
- One year after your last period if you are over 50
Weight loss injections should not be used during pregnancy, so if you could still become pregnant, you need effective contraception during treatment.
If you use the oral contraceptive pill and take Mounjaro, extra precautions are needed after starting and after each dose increase.
Read the full guidance in our article on weight loss injections, contraception and pregnancy.
Protecting your muscle during the menopause
Muscle mass and strength decline naturally from midlife, and this accelerates after the menopause.
Significant weight loss can also involve some loss of muscle.
Together, these make it especially important for women in midlife to protect their muscle while losing weight.
The two most effective strategies are:
- Strength (resistance) training at least twice a week, such as weights, resistance bands or bodyweight exercises
- Enough protein, spread across your meals
Read more in our article on weight loss injections and muscle loss.
Protecting your bones
Oestrogen helps to maintain bone density. After the menopause, bone loss speeds up and the risk of osteoporosis increases.
Weight loss, however it is achieved, can also be associated with some reduction in bone density, partly because the skeleton is carrying less load.
You can help protect your bones by:
- Doing weight-bearing and resistance exercise, such as brisk walking, stair climbing, dancing and strength training
- Getting enough calcium from dairy foods, fortified plant-based alternatives, tinned fish with bones, tofu and green leafy vegetables
- Taking a vitamin D supplement, as recommended for everyone in the UK during autumn and winter
- Eating enough protein
- Not smoking and keeping alcohol within recommended limits
- Avoiding very rapid weight loss
HRT itself helps to protect bone density.
If you have risk factors for osteoporosis, such as an early menopause, a previous fracture after a minor fall, long-term steroid use or a family history of hip fracture, ask your GP whether a bone health assessment is appropriate.
Can losing weight improve menopausal symptoms?
For some women, yes.
Research suggests that weight loss in women with overweight or obesity can reduce the frequency or severity of hot flushes and night sweats.
Weight loss may also improve:
- Sleep quality and sleep apnoea
- Joint pain
- Energy levels
- Blood pressure, blood sugar and cholesterol
- Mood and confidence
Weight loss injections are not a treatment for the menopause, and they do not replace HRT. But for women who are eligible, treating excess weight can be a valuable part of looking after health in midlife.
Symptoms that overlap
Some effects of weight loss injections can look similar to menopausal symptoms, which can make it hard to tell what is causing what.
- Tiredness: common in both. See tiredness on Mounjaro or Wegovy.
- Hair thinning: common in both. See hair loss on Mounjaro or Wegovy.
- Mood changes and poor sleep: common in the menopause, and can be affected by changes in eating.
- Changes to the face and skin: falling oestrogen reduces collagen, and weight loss reduces facial volume. See "Ozempic face" and loose skin.
- Nausea and digestive symptoms: common on weight loss injections and occasionally with oral HRT.
If you are unsure what is causing a symptom, speak to your GP or prescriber.
Which weight loss injection is best during the menopause?
There is no specific "best" injection for menopausal women.
Both Mounjaro and Wegovy are effective. On average, Mounjaro has produced greater weight loss in trials, while the evidence about reduced absorption of oral hormones is strongest for Mounjaro.
If you take oral HRT and do not wish to change it, this is worth discussing with both prescribers. For most women, a simple adjustment to the type of HRT resolves the issue.
You can compare the two in our article: Is Mounjaro better than Wegovy?
What SynovaMed will ask
During your consultation, our clinical team will ask about your medical history and all the medicines you take, including HRT and contraception.
If you take oral HRT, we may advise you to speak to your GP or menopause specialist about whether it should be reviewed.
You can learn more about our weight loss programme or contact our team with any questions.
Frequently Asked Questions
Can I take Mounjaro with HRT?
Yes, but tell both prescribers. Mounjaro may reduce the absorption of HRT taken by mouth, so HRT through the skin or a hormonal coil is generally preferred.
Can I take Wegovy with HRT?
Yes. The evidence for reduced absorption is weaker for Wegovy than for Mounjaro, but similar caution with oral HRT is advised.
Does Mounjaro stop HRT working?
Not if your HRT is delivered through the skin or by a hormonal coil. Oral HRT, particularly oral progestogen, may be less well absorbed.
Do I need to change my HRT if I start a weight loss injection?
Not necessarily, but if any part of your HRT is taken by mouth, ask your GP or menopause specialist for a review.
Is Utrogestan affected by Mounjaro?
Utrogestan taken by mouth is an oral progestogen, so its absorption may be reduced. Your HRT prescriber can advise whether to adjust the dose or change to another option.
Are HRT patches and gels affected?
No. They are absorbed through the skin and are not affected by changes in stomach emptying.
What should I do if I get bleeding on HRT after starting Mounjaro?
Report it to your GP. Unexpected bleeding is often harmless, but should always be assessed.
Do weight loss injections work after the menopause?
Yes. Clinical trials included postmenopausal women and showed substantial weight loss.
Will weight loss injections help with menopause belly fat?
They reduce overall body fat, including abdominal fat. They cannot target fat in one specific area.
Is HRT a contraceptive?
No. If you could still become pregnant, you need separate contraception while taking a weight loss injection.
Do weight loss injections affect bone density?
Weight loss of any kind can be associated with some reduction in bone density. Strength training, calcium, vitamin D and adequate protein help protect your bones.
The bottom line: weight loss injections, menopause and HRT
Weight loss injections can be used safely during the menopause and alongside HRT, but your HRT may need a review.
The key points are:
HRT through the skin and the hormonal coil are not affected.
Oral HRT, especially oral progestogen, may be less well absorbed, particularly with Mounjaro.
Tell both your weight loss prescriber and your HRT prescriber about all your medicines.
Never change your HRT yourself.
Report any unexpected bleeding.
Remember that HRT is not contraception.
Protect your muscle and bones with strength training, protein, calcium and vitamin D.
With the right HRT regimen and good support, many women find that treating excess weight in midlife improves both their health and their quality of life.
Medical Disclaimer
This article is intended for general educational purposes and does not replace personalised medical advice, diagnosis or treatment. Guidance on using weight loss medicines alongside HRT is based on limited evidence and may be updated. Decisions about HRT should be made with your GP or menopause specialist. Mounjaro, Wegovy and other prescription weight-management medicines are not suitable for everyone. Always tell every prescriber about all the medicines you take, and report any unexpected vaginal bleeding to your GP.