Exemestane is a drug used to treat breast cancer in postmenopausal women (women who have gone through the menopause/change of life). It is a type of hormone treatment and is known as an aromatase inhibitor. Aromasin may be prescribed if your breast cancer comes back or progresses while you are taking tamoxifen.

Why have I been prescribed Exemestane?

Exemestane is a drug used to treat breast cancer in postmenopausal women (women who have gone through the menopause/change of life). It is a type of hormone treatment and is known as an aromatase inhibitor. Aromasin may be prescribed if your breast cancer comes back or progresses while you are taking tamoxifen.

How does it work?

Exemestane is most useful for breast cancers that rely on oestrogen for their growth (oestrogen receptor positive tumours) as it reduces the amount of oestrogen in the body.

When and how do I take Exemestane?

Exemestane comes as a tablet that you take once a day, preferably after a meal. It is best to take it at the same time each day. If you miss a dose you don’t need to take a replacement dose as the drug will remain in your system from the previous day.

What’s the dose?

  • 25mg once a day.

Could they interact with other tablets?

It is not advisable to take other drugs containing oestrogen, such as the contraceptive pill or HRT, while you are taking Exemestane. There do not seem to be any other drugs that interfere with Exemestane. 

Herbal supplements should be used with caution and only after informing your doctor first.

What are the possible risks or side-effects?

More common side effects:

  • Nausea and vomiting which can sometimes be helped by taking your tablet with food
  • Tiredness
  • Menopausal symptoms such as hot flushes

Less common side effects:

  • Increased perspiration
  • constipation
  • increased appetite
  • weight gain
  • insomnia (sleeplessness)
  • feeling low

Rare side effects:

Can I drink alcohol while taking Exemestane?

Do not consume any alcohol while undergoing treatment with Exemestane.

What if I’m pregnant/breastfeeding?

Exemestane cannot be taken if pregnant or breast feeding.


Remember to keep all medicines out of reach of children
Please Note: 
We have made every effort to ensure that the content of this information sheet is correct at time of publish, but remember that information about drugs may change. This sheet does not list all the uses and side-effects associated with this drug. For full details please see the drug information leaflet which comes with your medicine. Your doctor will assess your medical circumstances and draw your attention to any information or side-effects which may be relevant in your particular case.

References:

https://www.steroid.com/Aromasin.php

http://www.breastcancer.org/treatment/hormonal/aromatase_inhibitors/aromasin

http://www.aromasin.com/

http://www.drugs.com/aromasin.html

http://www.cancerresearchuk.org/about-cancer/cancers-in-general/treatment/cancer-drugs/exemestane

http://chemocare.com/chemotherapy/drug-info/aromasin.aspx