Treatment-Induced Menopause: Symptoms and How to Manage Them

What treatment-induced menopause means

The menopause is when the ovaries stop releasing eggs and oestrogen levels fall, so periods stop. According to the NHS, this naturally happens around the age of 51 in the UK. Some breast cancer treatments can bring this on much earlier, or cause menopause-like symptoms even in women who have already been through the menopause. This is sometimes called treatment-induced, medical or early menopause.

Cancer Research UK explains that some breast cancer treatments lower the levels of sex hormones in the body, which can lead to an early menopause or menopausal symptoms. For younger women this can feel like a sudden and unexpected change to deal with on top of a cancer diagnosis. It is completely understandable to find this hard. This guide is general health information, not personal medical advice. Your breast care team, oncologist and GP know your situation, so please speak to them about your own symptoms and any worries you have.

Which treatments can cause it

Several different breast cancer treatments can affect your hormones. Cancer Research UK points to chemotherapy and hormone (endocrine) therapy as the main treatments that can trigger an early menopause or menopausal symptoms. The effect can be temporary or permanent, and this often depends on your age at the time of treatment.

• Chemotherapy can damage the ovaries and stop them working. In some women periods return after chemotherapy finishes, while in others, particularly women closer to the natural age of menopause, the change is permanent.
• Ovarian suppression uses a medicine such as goserelin (Zoladex), usually given as an injection, to switch off the ovaries so they stop making oestrogen. This deliberately brings on menopause-like symptoms while you are having the treatment. Ovarian function usually returns once the injections stop, though this is not guaranteed.
• Hormone therapy tablets, such as tamoxifen and aromatase inhibitors (anastrozole, letrozole and exemestane), lower oestrogen or block its effect. They do not stop the ovaries directly, but they commonly cause menopause-like symptoms such as hot flushes.
• Surgery to remove the ovaries (oophorectomy) causes an immediate and permanent menopause. This is less common but may be offered to some women.

Because the drop in oestrogen can be sudden rather than gradual, symptoms of treatment-induced menopause can feel more intense than a natural menopause. Knowing which treatment is affecting you helps you and your team plan how to manage it.

Symptoms to look out for

Menopausal symptoms vary a lot from person to person. Some women have only a few mild effects, while others find them harder to live with. The NHS and Cancer Research UK list a wide range of possible symptoms, and you may have some but not others.

• Hot flushes and night sweats (together called vasomotor symptoms), which are among the most common effects.
• Trouble sleeping, which can also add to tiredness during the day.
• Mood changes, such as feeling low, anxious or more irritable than usual.
• Problems with memory and concentration, sometimes called brain fog.
• Vaginal dryness, itching or discomfort, and pain or bleeding during or after sex.
• Lower interest in sex.
• Joint and muscle aches.
• Bladder problems, such as needing to pass urine more often or urinary infections.
• Weakening of the bones over time (the NHS notes that lower oestrogen can reduce bone strength).

Cancer Research UK also explains that for some women treatment affects fertility, and that it may still be possible to become pregnant, so contraception may be needed. These are important conversations to have early with your team. If any symptom is bothering you, it is worth raising it rather than putting up with it, because there is usually something that can help.

Why HRT is usually avoided

For women going through a natural menopause, hormone replacement therapy (HRT) is a common and effective treatment. After breast cancer, the picture is different. Cancer Research UK states that doctors do not routinely recommend HRT after breast cancer because of concern that it could increase the risk of the cancer coming back (recurrence). This is because many breast cancers grow in response to oestrogen, and HRT adds oestrogen back into the body.

This does not mean nothing can be done. There are several non-hormonal options that can ease symptoms safely. In some situations, where symptoms are severe and other options have not worked, a specialist team may discuss the possible risks and benefits of HRT with an individual woman so she can make an informed choice. That is a decision to make together with your oncologist and breast care team, not on your own. The rest of this guide focuses on the non-hormonal approaches that are usually tried first.

Everyday ways to ease hot flushes and sweats

Simple lifestyle changes can make hot flushes and night sweats easier to cope with, and they carry no risk to your cancer treatment. The NHS suggests several practical steps for managing flushes and sweats.

• Wear light, loose layers of clothing you can take off and put back on as your temperature changes.
• Keep your bedroom cool at night, and try using a fan.
• Cut down on triggers that can set off flushes for some people, such as caffeine, alcohol, spicy food and smoking.
• Try to keep to a healthy weight and stay physically active, which the NHS links to fewer and milder symptoms for some women.
• Use relaxation techniques, such as slow, deep breathing, when you feel a flush starting.
• Keep a cool drink of water to hand and sip it regularly.

It often helps to notice your own pattern. Keeping a short diary of when flushes happen and what you were doing can reveal triggers you can then adjust. Many women find that a combination of small changes works better than relying on any single one.

Non-hormonal medicines and talking therapies

When lifestyle changes are not enough, your GP or team may suggest a non-hormonal treatment. These do not use oestrogen, so they avoid the concerns linked to HRT.

• Certain antidepressants, given at a low dose, can reduce hot flushes and night sweats for some women, even if you are not depressed. The NHS notes these (a group called SSRIs and SNRIs) are sometimes used for this purpose. Important: some of these, including paroxetine and fluoxetine, can interfere with how tamoxifen works, so they should be avoided if you take tamoxifen. Your team will choose a safe option for you.
• Gabapentin and pregabalin, medicines more often used for nerve pain, can help reduce flushes for some women.
• Cognitive behavioural therapy (CBT) is a talking therapy that helps with the distress and disruption caused by symptoms. In updated guidance published in November 2024, NICE recommended menopause-specific CBT as an option for managing hot flushes, night sweats and sleep problems linked to menopause. In England, you can often refer yourself to NHS Talking Therapies without seeing your GP first.
• Vaginal moisturisers and lubricants, bought from a pharmacy, can ease vaginal dryness and make sex more comfortable. The NHS describes these as non-hormonal products that can be used regularly.

Always tell whoever prescribes for you that you have had breast cancer and which treatments you are on, so they can check that any medicine is safe alongside them. Never start or stop a prescribed medicine without speaking to your team first.

Looking after your bones and your wellbeing

An early menopause means a longer time with lower oestrogen, which the NHS explains can weaken bones over the years and raise the risk of osteoporosis (thinning bones). Some hormone therapies for breast cancer can also affect bone strength. Your team may arrange a bone density (DEXA) scan to check how strong your bones are, and may suggest medicines to protect them if needed.

• Stay active, including weight-bearing exercise such as walking, and muscle-strengthening activity, which the NHS links to stronger bones.
• Eat a balanced diet with enough calcium, found in foods such as dairy, leafy green vegetables and tinned fish with soft bones.
• Get enough vitamin D. The NHS advises that adults in the UK consider a daily 10 microgram vitamin D supplement, especially in the autumn and winter months.
• Avoid smoking and keep alcohol within recommended limits, as both can weaken bones.

Looking after your emotional health matters just as much. Going through the menopause early, and at the same time as cancer treatment, can feel overwhelming, and it is normal to grieve changes to your body, your sleep or your fertility. Talking to your breast care nurse, your GP, or a support organisation can make a real difference. Charities such as Breast Cancer Now offer free support, and many areas have menopause clinics that work alongside cancer teams.

Why this matters everywhere

Good support through treatment-induced menopause is part of living well after breast cancer, not an optional extra. Yet not everyone has the same access to information, specialist clinics or follow-up care. Our charity works to improve early detection and access to support in underserved communities, so that more people, wherever they live, can understand what to expect from treatment and get help with the side effects. Knowing that symptoms can be managed, and that you do not have to simply put up with them, is an important part of that.

If your symptoms are hard to cope with, please do not struggle in silence. Speak to your GP or treatment team. With the right combination of lifestyle changes, non-hormonal treatments and support, most women find their symptoms become much easier to live with over time.