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Toremifene for breast cancer

Fareston

Take one tablet of toremifene each day.

You can take the tablet before or after food.

The most common side-effects are hot flushes and sweating.

At a glance

  • Toremifene is a hormone treatment for metastatic breast cancer in women.

  • It works by blocking oestrogen receptors on cancer cells, preventing growth.

  • Do not take toremifene if you are still having menstrual periods.

  • Take one tablet daily at the same time each day, with or without food.

  • Common side effects include hot flushes, nausea, dizziness, and vaginal bleeding.

  • Seek medical advice if you experience pain or swelling in a leg, or shortness of breath.

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About toremifene

Type de médicament

An anti-oestrogen hormone antagonist

Utilisé pour

Metastatic breast cancer

Aussi appelé

Fareston®

Disponible sous forme de

Comprimés

Treatment options for women with cancer du sein include surgery, radiotherapy, chemotherapy and hormone treatment. Often a combination of two or more of these treatments is used. Toremifene is a hormone treatment.

Some breast cancers need the female hormone oestrogen to grow. The cells of these cancers have receptors on their surface that oestrogen can attach to and are called 'hormone receptor-positive' cancers. Toremifene works by blocking the receptors and this prevents oestrogen from reaching the cancer cells. This helps to control the cancer. It is prescribed for women with breast cancer where the cancer cells have also spread to another part of the body, such as the lungs, liver or bones. This sort of breast cancer is referred to as metastatic breast cancer, or secondary breast cancer.

Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking toremifene it is important that your doctor knows:

  • If you are still having menstrual periods. If so, you should not take toremifene.

  • If you have had a stroke, a blood clot in your lungs, or deep venous thrombosis (DVT).

  • If you have a heart condition, or a heart rate or rhythm problem.

  • If you have been told the lining of your womb has become thickened, a condition called endometrial hyperplasia.

  • Si vous avez des problèmes avec le fonctionnement de votre foie.

  • Si vous avez un trouble sanguin héréditaire rare appelé porphyrie.

  • Si vous prenez d'autres médicaments. Cela inclut tous les médicaments que vous prenez et qui sont disponibles à l'achat sans ordonnance, ainsi que les médicaments à base de plantes et les médecines complémentaires.

  • Si vous avez déjà eu une réaction allergique à un médicament.

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  • Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about toremifene and will provide you with a full list of the side-effects which you may experience from taking it.

  • Take one 60 mg tablet each day, exactly as your doctor tells you to.

  • You may take toremifene at whatever time of day you find easiest to remember, but try to take your doses at the same time of day, each day. This will help you to remember to take your doses regularly.

  • You can take toremifene tablets before or after meals.

  • If you forget to take a dose at your usual time, take it as soon as you remember. If you do not remember until the following day, skip the missed dose. Do not take two doses together to make up for a forgotten dose.

  • Try to keep your regular appointments with your doctor or clinic. This is so your doctor can check on your progress. This is particularly important if you also have bone cancer, as you will need to have regular blood tests when you start this treatment.

  • If you are having an operation, tell the person carrying out the treatment that you are taking toremifene.

  • Si vous achetez des médicaments, vérifiez toujours avec un pharmacien qu'ils sont compatibles avec vos autres médicaments.

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Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with toremifene. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.

Very common toremifene side-effects (these affect more than 1 in 10 women)


Que puis-je faire si je ressens cela ?

Hot flushes and sweating

Try to keep cool by wearing light, airy clothes

Common toremifene side-effects (these affect fewer than 1 in 10 women)

Que puis-je faire si je ressens cela ?

Se sentir malade (nausée) ou être malade (vomissements)

Stick to simple meals and avoid rich or spicy foods

Se sentir étourdi ou fatigué

Ne conduisez pas et n'utilisez pas d'outils ou de machines lorsque vous êtes affecté

Vaginal bleeding or discharge

Let your doctor know straightaway so the cause can be investigated. Your doctor will want to check to see if there are any changes that could cause concern in the lining of your womb

Itchy skin rash, swollen feet or ankles, feeling depressed

Si l'un de ces éléments devient problématique, consultez votre médecin pour obtenir des conseils

Important : Some women taking toremifene have experienced a problem with a blood clot in the legs or lungs. Although this occurs less commonly than the side-effects mentioned above, if you experience any pain or swelling in a leg, or have any shortness of breath, please contact a doctor for advice as soon as possible.

Si vous ressentez d'autres symptômes que vous pensez être dus aux comprimés, parlez-en à votre médecin ou à votre pharmacien pour obtenir des conseils supplémentaires.

  • Gardez tous les médicaments hors de la portée et de la vue des enfants.

  • Conserver dans un endroit frais et sec, à l'abri de la chaleur et de la lumière directes.

Informations importantes sur tous les médicaments

Ne prenez jamais plus que la dose prescrite. Si vous soupçonnez que vous ou quelqu'un d'autre avez pris une surdose de ce médicament, rendez-vous au service des urgences de votre hôpital local. Emportez le contenant avec vous, même s'il est vide.

Ce médicament est pour vous. Ne le donnez jamais à d'autres personnes, même si leur état semble être le même que le vôtre.

Ne gardez pas de médicaments périmés ou indésirables. Apportez-les à votre pharmacie locale qui s'en débarrassera pour vous.

Si vous avez des questions concernant ce médicament, demandez à votre pharmacien.

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Signalez les effets secondaires suspectés des médicaments, vaccins, cigarettes électroniques, incidents liés aux dispositifs médicaux, produits défectueux ou falsifiés (contrefaits) à l'Agence de Régulation des Médicaments et Produits de Santé pour garantir une utilisation sûre et efficace.

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Questions fréquemment posées

How does toremifene specifically target breast cancer growth?

Toremifene works by blocking the receptors on breast cancer cells that the female hormone oestrogen usually attaches to. This prevents oestrogen from stimulating the cancer cells, which helps to control the growth of cancers that need oestrogen to grow.

Can toremifene be used for all types of breast cancer?

No, toremifene is specifically prescribed for women with breast cancer where the cancer cells are 'hormone receptor-positive', meaning they need oestrogen to grow. It is also used when the cancer has spread to other parts of the body, such as the lungs, liver, or bones.

What should I do if I am still having menstrual periods?

If you are still experiencing menstrual periods, you should not take toremifene. It is important to inform your doctor about your menstrual status before starting this treatment.

Is it safe to take toremifene if I have a history of blood clots?

If you have a history of blood clots, such as a stroke, a blood clot in your lungs, or deep venous thrombosis (DVT), it is important that your doctor is aware of this before you start taking toremifene.

What should I do if I experience vaginal bleeding or discharge while taking toremifene?

If you experience vaginal bleeding or discharge, you should let your doctor know straight away. Your doctor will need to investigate the cause and check for any changes in the lining of your womb that could be a concern.

What are the common side effects I might experience?

Very common side effects (affecting more than 1 in 10 women) include hot flushes and sweating. Common side effects (affecting fewer than 1 in 10 women) can include feeling sick or being sick, feeling dizzy or tired, vaginal bleeding or discharge, itchy skin rash, swollen feet or ankles, and feeling depressed.

Are there any serious side effects I should be aware of?

Yes, although less common than other side effects, some women taking toremifene have experienced a blood clot in the legs or lungs. If you notice any pain or swelling in a leg, or have shortness of breath, you should contact a doctor for advice as soon as possible.

Lectures complémentaires et références

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About the authorView full bio

Author image

Michael Stewart, MRPharmS

Medicine Leaflet Review Manager – Contractor, Pharmacist

BPharm (Hons), MRPharmS

Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.

About the reviewer

Author image

Sid Dajani

Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.

Historique de l'article

Les informations sur cette page sont rédigées et examinées par des cliniciens qualifiés.

  • Next review due: 26 Nov 2026
  • 27 nov. 2023 | Dernière version

    Dernière mise à jour par

    Michael Stewart, MRPharmS

    Revu par

    Sid Dajani
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