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Toremifeno para el cáncer de mama

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.

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About toremifene

Tipo de medicamento

An anti-oestrogen hormone antagonist

Usado para

Metastatic breast cancer

También llamado

Fareston®

Disponible como

Comprimidos

Treatment options for women with cáncer de mama 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 tienes problemas con el funcionamiento de tu hígado.

  • Si tienes un trastorno sanguíneo hereditario raro llamado porfiria.

  • Si está tomando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que esté disponible para comprar sin receta, así como medicamentos herbales y complementarios.

  • Si alguna vez has tenido una reacción alérgica a un medicamento.

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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 compras algún medicamento, siempre consulta con un farmacéutico que sean adecuados para tomar con tus otros medicamentos.

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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)


¿Qué puedo hacer si experimento esto?

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)

¿Qué puedo hacer si experimento esto?

Sentirse mal (náuseas) o estar enfermo (vómitos)

Stick to simple meals and avoid rich or spicy foods

Sensación de mareo o cansancio

No conduzca ni utilice herramientas o máquinas mientras esté afectado

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 alguno de estos se vuelve problemático, hable con su médico para obtener consejo

Importante: 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 experimenta cualquier otro síntoma que crea que puede deberse a las tabletas, hable con su médico o farmacéutico para obtener más consejos.

  • Mantenga todos los medicamentos fuera del alcance y la vista de los niños.

  • Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.

Información importante sobre todos los medicamentos

Nunca tome más de la dosis prescrita. Si sospecha que usted u otra persona podría haber tomado una sobredosis de este medicamento, acuda al departamento de accidentes y emergencias de su hospital local. Lleve el envase con usted, incluso si está vacío.

Este medicamento es para ti. Nunca lo des a otras personas, incluso si su condición parece ser la misma que la tuya.

No guardes medicamentos caducados o no deseados. Llévalos a tu farmacia local, que se encargará de desecharlos por ti.

Si tienes alguna pregunta sobre este medicamento, consulta a tu farmacéutico.

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Informe los efectos secundarios sospechosos de medicamentos, vacunas, cigarrillos electrónicos, incidentes con dispositivos médicos, productos defectuosos o falsificados (falsos) a la Agencia Reguladora de Medicamentos y Productos Sanitarios para garantizar un uso seguro y efectivo.

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Lecturas adicionales y referencias

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Historial del artículo

La información en esta página está escrita y revisada por pares por clínicos calificados.

  • Próxima revisión: 26 Nov 2026
  • 27 Nov 2023 | Última versión

    Última actualización por

    Michael Stewart, MRPharmS

    Revisado por pares por

    Sid Dajani
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