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Toremifene for breast cancer

Fareston

Take one tablet of toremifene each day.

Puede tomar el comprimido antes o después de la comida.

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

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About toremifene

Tipo de medicamento

An anti-oestrogen hormone antagonist

Utilizado para

Metastatic breast cancer

También llamado

Fareston®

Disponible como

Tabletas

Treatment options for women with breast cancer 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.

Before taking toremifene

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 tiene problemas con el funcionamiento del hígado.

  • Si padece un raro trastorno sanguíneo hereditario llamado porfiria.

  • Si está tomando otros medicamentos. Esto incluye cualquier medicamento que esté tomando y que pueda adquirirse sin receta, así como medicamentos a base de plantas y complementarios.

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

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How to take toremifene

  • 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.

Aproveche al máximo su tratamiento

  • 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 compra algún medicamento, compruebe siempre con un farmacéutico que es adecuado para tomarlo con sus otros medicamentos.

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Can toremifene cause problems?

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 me ocurre esto?

Hot flushes and sweating

Intenta mantenerte fresco vistiendo ropa ligera y aireada

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

¿Qué puedo hacer si me ocurre 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 síntomas le resulta molesto, consulte a su médico.

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 experimenta cualquier otro síntoma que crea que puede deberse a los comprimidos, hable con su médico o farmacéutico para que le aconsejen.

How to store toremifene

  • Mantenga todos los medicamentos fuera del alcance y de 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

Información importante sobre todos los medicamentos

No tome nunca más de la dosis prescrita. Si sospecha que usted u otra persona ha tomado una sobredosis de este medicamento, acuda al servicio de urgencias de su hospital. Llévese el envase, aunque esté vacío.

Este medicamento es para usted. Nunca se lo dé a otras personas aunque su enfermedad parezca ser la misma que la suya.

No guarde medicamentos caducados o que no desee. Llévelos a su farmacia local, que se encargará de eliminarlos por usted.

Si tiene cualquier duda sobre este medicamento pregunte a su farmacéutico.

MHRA - Notificación de reacciones adversas

Notifique a la Agencia Reguladora de Medicamentos y Productos Sanitarios las sospechas de efectos secundarios de medicamentos, vacunas, cigarrillos electrónicos, incidentes con productos sanitarios o productos defectuosos o falsificados para garantizar un uso seguro y eficaz.

Lecturas complementarias y referencias

Historia del artículo

La información de esta página ha sido redactada y revisada por médicos cualificados.

  • Fecha prevista para la próxima revisión: 26 nov 2026
  • 27 Nov 2023 | Última versión

    Última actualización

    Michael Stewart, MRPharmS

    Revisado por expertos

    Sid Dajani
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