Fulvestrant para el cáncer de mama
Faslodex
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSÚltima actualización 24 Feb 2023
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Fulvestrant injection will be given to you by your doctor or nurse. Try to keep your appointments so that you receive the injections on time.
The most common side-effects are feeling tired, feeling sick (nausea), and pain at the site of the injection.
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About fulvestrant
Tipo de medicamento | An anti-oestrogen hormone antagonist |
Usado para | Breast cancer in women |
También llamado | Faslodex® |
Disponible como | Inyección |
Fulvestrant is a hormonal breast cancer treatment. It is used to treat advanced cáncer de mama and metastatic breast cancer. Advanced breast cancer is cancer which has progressed despite treatment, and metastatic breast cancer is cancer which has spread into other parts of the body.
Many breast cancers need the female hormone oestrogen to grow. The cells of these cancers have tiny areas called receptors on their surface, to which oestrogen can attach. They are called 'hormone receptor-positive' cancers. Fulvestrant works by blocking the receptors and this prevents oestrogen from reaching the cancer cells. This slows the growth of the cancer.
Before having fulvestrant
Volver al contenidoSome medicines are not suitable for people with certain conditions, and sometimes a medicine can only be used if extra care is taken. For these reasons, before you start having fulvestrant injections it is important that your doctor or nurse knows:
If you have not yet gone through the menopause, or if there is a possibility you could be pregnant.
Si tienes algún problema con el funcionamiento de tu hígado, o algún problema con el funcionamiento de tus riñones.
If you have any blood clotting problems or bleeding disorders.
Si alguna vez has tenido una reacción alérgica a un medicamento.
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.
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How fulvestrant will be administered
Volver al contenidoBefore you start the treatment, ask to read the manufacturer's printed information leaflet from inside the pack. It will give you more information about fulvestrant and it will also provide you with a full list of the side-effects which you could experience from having it.
Your doctor or nurse will give you the fulvestrant injection. He or she will give you an injection every two weeks to begin with (for the first three doses); after that it will be given once each month. It will be injected slowly over a couple of minutes into muscles in your bottom. For each dose, you will be given an injection into both buttocks.
Obteniendo el máximo de tu tratamiento
Volver al contenidoTry to keep your regular appointments with your doctor or clinic. This is so your doctor can check on your progress. You may need to have a blood test from time to time.
Fulvestrant injection contains a small amount of alcohol. This is usually harmless, but if you have ever had a problem with an addiction to alcohol, you should let your doctor know about this.
It is important that you do not get pregnant while you are having treatment with fulvestrant. Make sure you have discussed with your doctor which types of contraception are suitable for you and your partner. You should continue to use contraception for two years after your treatment has finished.
If you are due to have an operation, tell the person carrying out the treatment that you are having fulvestrant treatment.
If you buy any medicines 'over the counter', always check with a pharmacist that they are suitable to take alongside your prescribed medicines.
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Can fulvestrant cause problems?
Volver al contenidoAlong 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 fulvestrant. The best place to find a full list of the side-effects which can be associated with your medicine, is from the manufacturer's printed information leaflet supplied with the medicine. Alternatively, you can find an example of a manufacturer's information leaflet in the reference section below. Speak with your doctor or pharmacist if any of the following continue or become troublesome.
Muy comunes fulvestrant side-effects (these affect more than 1 in 10 women) | ¿Qué puedo hacer si experimento esto? |
Sentirse mal (náuseas) | Mantente en comidas simples - evita alimentos grasos o picantes |
Feeling weak or tired | No conduzca ni utilice herramientas o máquinas mientras esté afectado |
Pain or inflammation at the injection site | Hable con su médico si es problemático |
Joint or muscle pains | Ask your pharmacist to recommend a suitable painkiller. If the pain continues, speak with your doctor |
Changes to liver enzymes | Your doctor will arrange for you to have blood tests to check for this |
Comunes fulvestrant side-effects (these affect fewer than 1 in 10 women) | ¿Qué puedo hacer si experimento esto? |
Dolor de cabeza | Bebe mucha agua y pide a tu farmacéutico que te recomiende un analgésico adecuado. Si los dolores de cabeza continúan, consulta a tu médico |
Hot flushes | Try to keep cool by wearing light, airy clothes |
Diarrea | Bebe mucha agua para reponer los líquidos perdidos |
Loss of appetite, urine infections, back pain | Speak with your doctor about these |
Importante: your doctor will discuss with you the possibility of more serious side-effects. These are listed below. You must let your doctor know straightaway if any happen to you:
Any pain or swelling in your lower leg. This is because taking fulvestrant can increase the risk of you developing a blood clot in your legs.
Any swelling of your face or throat, feeling short of breath, or a severe skin rash. These could be signs of an allergic-type reaction.
If you experience any other symptoms which you think may be due to the injection, speak with your doctor or pharmacist for further advice.
How to store fulvestrant
Volver al contenidoIf you are asked to store fulvestrant injection, keep it in a refrigerator at 2-8°C.
Mantenga todos los medicamentos fuera del alcance y la vista de los niños.
Información importante sobre todos los medicamentos
Volver al contenidoInformación importante sobre todos los medicamentos
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.
If you have any questions about the medicine ask your pharmacist.
Informar efectos secundarios de un medicamento o vacuna
Si experimenta efectos secundarios, puede reportarlos en línea a través de sitio web de la Tarjeta Amarilla.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Lecturas adicionales y referencias
- Manufacturer's PIL, Faslodex® 250 mg solution for injection; AstraZeneca UK Limited, The electronic Medicines Compendium. Dated December 2020.
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
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Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Próxima revisión: 23 de agosto de 2027
24 Feb 2023 | Última versión

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