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Cyproterone acetate

sye-pro-te-rone ass-ih-tate

What does it do?

Cyproterone acetate is used to treat the symptoms of prostate cancer and sometimes other conditions due to hormone imbalance.

How should you take it?

Take cyproterone acetate as directed with food and a glass of water.

What if you forget a dose?

Take the missed dose as soon as possible. If it is close to the time for your next dose, skip the missed dose and carry on as normal. Do not take two doses at the same time.

Can you take other medicines?

Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products (e.g. DHEA, liquorice root) or recreational drugs.

What side effects might you notice?

Side EffectsRecommended action

Symptoms of liver problems including: yellow skin or eyes, itching, dark urine, pale bowel motions, abdominal pain

Trouble breathing

Easy/unusual bruising or bleeding

Tell your doctor immediately

Low mood

Tell your doctor

Flushing, sweating

Sore or enlarged breasts

Drowsiness, tiredness, headache

Weight changes

Less interest in sex

Tell your doctor if troublesome

If you notice any other effects, discuss them with your doctor or pharmacist.

Other information:

  • Tell your doctor if you have heart, liver or lung problems, diabetes, or a history of depression, stroke or blood clots.
  • Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.
  • Cyproterone acetate can affect fertility in both men and women – discuss with your doctor.
  • Cyproterone acetate may make you dizzy or sleepy and make it dangerous to drive, operate machinery or do other activities that require you to be alert. Limit alcohol intake because it can increase these effects.

This leaflet contains important, but not all, information about this medicine.

Prepared by the PILs Committee at Christchurch Hospital, Canterbury District Health Board, New Zealand. December 2017

For more general information about this sheet and its contents, see: What does a My Medicines sheet cover?

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About My Medicines

My Medicines Patient Information Leaflets (PILs) contain important, but not all, information about the medicines they describe.

For more information about the sheets, see: What does a My Medicines sheet cover?

My Medicines is developed by a team at the Canterbury District Health Board. Our team is made up of doctors, pharmacists, and a non-medical person to help us keep to plain language. We also discuss our information with specialist health professionals or groups when needed