Medical Oncologist
Medicines
Joint pain and fatigue on exemestane
Aching joints, morning stiffness and tiredness are some of the most common reasons women struggle with exemestane. This page explains why low oestrogen causes these symptoms, when they tend to start, what helps most, including exercise and simple pain relief, which treatments your team can offer, and which kinds of pain should always be checked.
NG
Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
On this page
- Why does exemestane cause joint pain and tiredness, and what helps?
- Four approaches that help many women
- Common symptoms and what usually helps
- The vocabulary, in plain language
- What we can and cannot promise
- Building an exercise routine that eases joint pain
- Pain that needs checking
- Myths about joint pain on exemestane
- Common questions about joint pain and fatigue on exemestane
The short answer
Why does exemestane cause joint pain and tiredness, and what helps?
Joint pain, stiffness and tiredness are among the most common side effects of exemestane and the other aromatase inhibitors. They happen because oestrogen helps keep joints, tendons and the tissues around them supple, and exemestane lowers oestrogen to very low levels. Many women notice aching or stiffness in the hands, wrists, knees, hips, shoulders or feet, often worst first thing in the morning or after sitting still. Some develop tingling in the fingers from carpal tunnel syndrome, or a finger that catches when bending. Symptoms usually start within the first few months of treatment. For some they are mild and settle; for others they are troublesome enough to make women think about stopping. Tiredness can come from the tablet itself, but also from poor sleep because of night sweats, low mood, earlier chemotherapy or radiotherapy, low vitamin D, low iron or thyroid problems, which can be checked. The good news is that several things help. Regular exercise, including walking and strength training, has the best evidence for easing aromatase inhibitor joint pain. Simple painkillers, warmth, stretching and keeping a healthy weight also help many women. If symptoms persist, options include acupuncture, the medicine duloxetine, or switching to a different hormone tablet. Please do not simply stop exemestane. Tell your team, because most women can find a way to continue treatment more comfortably.
It is common and not dangerous
Aromatase inhibitor joint pain does not damage the joints the way arthritis can.
Exercise has the strongest evidence
Regular walking and strength exercise can reduce aches and improve energy.
Switching is an option
If other measures fail, another aromatase inhibitor or tamoxifen may suit you better.
This page gives general information only. Your oncology team can advise on your own symptoms.Ways to feel better
Four approaches that help many women
Most women combine more than one of these.
Keep moving
A mix of brisk walking, gentle strength work and stretching, built up gradually over weeks, has been shown in trials to reduce joint pain.
Simple pain relief
Paracetamol, or anti-inflammatory tablets if they suit you, taken for a few weeks can make it easier to stay active.
Check anti-inflammatory tablets with your doctor if you have stomach, kidney or heart problems.Warmth and gentle routines
A warm shower in the morning, hand exercises, yoga and avoiding long periods of sitting still ease stiffness.
Treatments your team can offer
When self-help is not enough, there are medical options.
Options to discuss
- Acupuncture, which showed a modest benefit in a trial
- Duloxetine, a medicine that can ease this type of pain
- Switching to letrozole, anastrozole or tamoxifen
Symptom guide
Common symptoms and what usually helps
Symptom
What often helps
Morning stiffness in hands
Warm water, gentle finger stretches and a soft stress ball
Aching knees or hips
Regular walking, strengthening exercises and keeping to a healthy weight
Tingling or numb fingers at night
A wrist splint at night; tell your team, as carpal tunnel can be treated
Tiredness during the day
Short daily activity, pacing tasks and checking sleep, mood and blood tests
Poor sleep from night sweats
A cool bedroom, cotton bedding and asking about treatment for flushes
Words you may hear
The vocabulary, in plain language
- Aromatase inhibitor joint symptoms
- The aching and stiffness in joints and muscles linked to low oestrogen on these tablets.
- Carpal tunnel syndrome
- Pressure on a nerve at the wrist causing tingling, numbness or weakness in the fingers.
- Trigger finger
- A finger that catches or locks when you bend and straighten it.
- Duloxetine
- A medicine used for depression and some types of long-lasting pain.
- Resistance exercise
- Activities that make muscles work against weight, such as bands, light weights or standing from a chair.
- Cancer-related fatigue
- Tiredness linked to cancer or its treatment that rest alone does not fully relieve.
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Being straight with you
What we can and cannot promise
Joint pain on hormone therapy is well recognised, but treatments do not work for everyone.
Benefits are often modest
Exercise, acupuncture and duloxetine reduced pain on average in trials, but not all women improved, and none of them removed symptoms completely for most people.
Supplements have mixed evidence
Omega-3 fish oil and glucosamine have not clearly helped in studies. Vitamin D is worth taking if your level is low.
What this page cannot tell you
It cannot tell you whether your pain is from exemestane or another cause, such as arthritis. Your doctor may examine you or arrange tests to find out.
Getting started
Building an exercise routine that eases joint pain
Exercise can feel like the last thing you want when joints ache, but starting small makes it manageable.
Begin gently
Start with ten minutes of walking on most days and add a few minutes each week. Aim, over time, for around two and a half hours of moderate activity across the week.
Add strength work
Twice a week, try simple exercises such as standing up from a chair, wall push-ups or light resistance bands. Stronger muscles take pressure off joints and protect bones.
Choose joint-friendly options
Swimming, cycling, yoga and water exercise are kind to painful joints. A physiotherapist can tailor a plan if you have arthritis or past injuries.
Knowing when to ask
Pain that needs checking
Most aches on exemestane are side effects, but some symptoms should be looked at promptly.
A single hot, swollen joint
Redness, heat and swelling in one joint may point to gout, infection or another type of arthritis.
Bone pain that persists
Pain in one spot, such as the back, ribs or hip, that lasts for weeks, keeps you awake at night or gets steadily worse should be checked, to rule out other causes.
Weakness or numbness
Weakness in the hand, dropping things, or numbness spreading down a limb should be reported quickly.
Commonly believed
Myths about joint pain on exemestane
Resting my joints will make them better.
Too much rest increases stiffness. Regular, gentle activity usually helps more.
Joint pain means the tablet is damaging my bones.
The aches are not a sign of joint damage. Bone thinning is a separate issue checked with scans.
More pain means more protection.
Side effects do not show how well exemestane is working. Women without pain benefit too.
I just have to put up with it for five years.
There are many ways to ease symptoms, including switching tablets. Ask your team.
Questions we are asked
Common questions about joint pain and fatigue on exemestane
When does joint pain usually start on exemestane?
Many women notice aches or stiffness within the first few weeks to months of starting. For some, symptoms peak during the first year and then level off or ease. Others find they come and go. If pain appears for the first time after years of treatment, mention it, as another cause may be worth checking.
Will the joint pain go away when I stop exemestane?
For most women, joint pain caused by aromatase inhibitors improves after stopping, usually over weeks to a few months. If aches remain long after treatment ends, arthritis or another condition may be involved, and your doctor can assess this.
Is it safe to take painkillers every day for joint pain?
Paracetamol at the recommended dose is generally safe for regular use. Anti-inflammatory tablets such as ibuprofen can be effective but may upset the stomach or affect the kidneys and heart with long use. Ask your doctor before taking them for more than a short time.
Does yoga help aromatase inhibitor joint pain?
Yoga can improve flexibility, strength, sleep and tiredness, and some small studies suggest it may ease joint symptoms. Choose a gentle class, tell the teacher about any painful joints, and avoid positions that strain the affected area. It works well alongside walking and strength exercise.
Why am I so tired on exemestane?
Low oestrogen can cause tiredness, but so can disturbed sleep, low mood, pain and the lasting effects of earlier treatment. Your team may check your blood count, iron, thyroid and vitamin D. Regular activity, a steady sleep routine and pacing your day often improve energy over time.
Can I take a break from exemestane to see if the pain improves?
Sometimes a doctor arranges a short, planned break of a few weeks to see whether symptoms are caused by the tablet, before restarting or switching. This should only be done with your oncologist's agreement, so that the break is brief and a clear plan is in place.
Does switching from exemestane usually help?
It helps some women, but not all. Because all aromatase inhibitors lower oestrogen, joint pain can continue on another one. Tamoxifen works differently and is less linked with joint pain, so it may be an option for postmenopausal women. Your oncologist will weigh the pros and cons with you.
Can carpal tunnel syndrome on exemestane be treated?
Yes. A wrist splint worn at night often helps. Some women benefit from a steroid injection into the wrist, and a small operation can relieve pressure on the nerve if symptoms persist. Tell your team early, as ongoing pressure can weaken the hand over time.
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Sources
- Breast Cancer Now — Exemestane (Aromasin)
- Macmillan Cancer Support — Exemestane
- National Cancer Institute — Fatigue and Cancer Treatment
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.