Cyprostat 100 mg tablet. (Cyproterone Acetate)
What Cyprostat 100 mg is and what it is used for
What is Cyprostat 100 mg?
Cyprostat l00 mg is a medicine containing cyproterone acetate. It is an anti-androgen therapy. It blocks the actions of male sex hormones (androgens) and reduces the amount of male sex hormones produced by the body.
What is Cyprostat 100 mg used for?
Cyprostat l00 mg is used in men to treat prostate cancer.
This medicine is used:
- to reduce the possible worsening of the disease which may occur when you start other treatments used for prostate cancer
- for long term treatment of prostate cancer when surgery or other medicines are not suitable
- to treat hot flushes which may occur during treatments with other medicines used for prostate cancer or following surgery.
Before you take Cyprostat
Do not take Cyprostat if you have:
- liver diseases (including previous or existing liver tumours (unless these are due to secondary cancers caused by prostate cancer), Dubin-Johnson Syndrome or Rotor Syndrome)
- any type of cancer (other than cancer of the prostate gland)
- ever been diagnosed with a meningioma (a generally benign tumour of the tissue layer between the brain and the skull). You should ask your doctor if you are in doubt
- wasting diseases (diseases involving an unintended loss of weight or muscle) except for prostate cancer that cannot be operated on blood clots (thrombosis or embolism)
- you are allergic (hypersensitive) to cyproterone acetate or any of the other ingredients of this medicine (see Section 6: Further information)
- you are under 18 years old if your testes or bones are not yet fully formed.
Take special care with Cyprostat:
Several blood tests or checks may be required while you are taking this medicine:
- liver problems, some of them severe or even fatal, have been reported with cyproterone acetate treatment. Your doctor may arrange for you to have regular liver tests before and during treatment to monitor this and may stop your treatment if necessary.
- using medicines such as Cyprostat has very rarely been linked to the development of benign (non-malignant) liver tumours and with some forms of liver cancer (malignant liver tumours). Liver tumours may lead to bleeding in the abdomen, which can be life-threatening. If you have any new stomach discomfort or pain that does not go away quickly, you must tell your doctor straightaway
- blood clots have been reported in patients taking this medicine which may also be linked to the reason you are taking Cyprostat. Tell your doctor if any of the following apply to you, as you may be at an increased risk of getting a blood clot. If you have:
a history of blood clots, strokes or heart attacks abnormal red blood cells (sickle -cell anaemia) severe diabetes that affects your blood circulation
- if you suffer from severe depression, this may get worse whilst you are taking Cyprostat. (See your doctor if you are affected by this)
- effects on the blood (anaemia) have been reported rarely during long term treatment with this medicine.
- shortness of breath has been reported in patients taking this medicine at high doses (300mg daily)
- Cyprostat can alter the sugar levels in your blood. If you are diabetic, check your blood sugar levels regularly. Your doctor may alter the dose of medicine used to treat your diabetes
- Your doctor will check the function of your adrenal glands, as they may become suppressed during treatment with Cyprostat. Symptoms may include tiredness, fatigue, loss of appetite, weight loss, low blood sugar, low blood pressure, dehydration, headache, irritability and depression, aching muscles, abdominal pain, a craving for salty foods, feeling or being sick and diarrhoea.
Taking or using other medicines
Please tell your doctor if you are taking, or have recently taken, any other medicines, including medicines obtained without a prescription.
Some medicines may stop Cyprostat from working properly. Also, Cyprostat may change the way other medicines you are taking are broken down in your body.
Tell your doctor if you take any other medicines regularly, especially:
- medicines such as rifampicin for the treatment of tuberculosis
- medicines such as phenytoin used to treat epilepsy or other illnesses
- products containing the herbal remedy commonly known as St John’s wort (Hypericum perforatum)
- medicines such as ketoconazole, itraconazole, clotrimazole for the treatment of fungal conditions
- medicines such as ritonavir used to treat HIV infections
- cholesterol-lowering drugs such as statins. Cyprostat may make the side effects of statins worse, for example the breakdown of muscle
- medicines such as glitazones used to treat diabetes.
If you are diabetic your doctor may need to alter the dose of medicine required to treat your diabetes. See also Section 2 ‘Take Special Care with Cyprostat l00 mg’.
Driving and using machines
You may feel tired and weak during treatment. If affected, do not drive, operate machinery or do anything where these symptoms may put either yourself or others at risk.
Important information about some of the ingredients in Cyprostat
If you have an intolerance to some sugars, check with your doctor before taking this medicine. This is because the tablets contain lactose (a type of sugar).
How to take Cyprostat
Your doctor will decide what dose you will take. Always take Cyprostat l00 mg exactly as your doctor has told you. You should check with your doctor if you are not sure.
Take the tablets after meals and swallow them whole with a drink of water.
The usual dose range is from 1 tablet once a day (l00 mg) up to 1 tablet three times a day (300mg).
If you take more Cyprostat than you should
As soon as you can, talk to your doctor who will tell you what you need to do. There have been no reports of serious illness from taking too much Cyprostat in a single dose.
If you forget to take Cyprostat
If you forget to take a dose, take it as soon as you remember and take the next dose when it is due. Do not take a double dose to make up for a forgotten dose.
If you stop taking Cyprostat
Do not reduce the dose or stop taking your tablets unless your doctor tells you to.
If you have any further questions on the use of this product, ask your doctor or pharmacist.
Possible side effects
Like all medicines, Cyprostat can cause side effects, although not everybody gets them.
If you have trouble breathing or swallowing, this may be a sign of a rare allergic reaction – contact your doctor or go to a hospital straight away.
These are the possible side effects of Cyprostat, starting with the more common ones:
more than 1 in 10 people may get these
- decreased sex drive impotence
- reduced sperm count reduced volume of ejaculate
up to 1 in every 10 people may get these
- weight decrease or increase, which can be associated with fluid retention
- depressed mood
- breast swelling sometimes with tenderness
- hot flushes, sweating
- shortness of breath
- liver problems, some of them severe or even fatal, have been reported with dosages of 100 mg and above of cyproterone acetate. Your doctor may arrange for you to have regular liver tests during treatment to monitor this and may stop your treatment if necessary
up to 1 in every 100 people may get this
up to 1 in every 1000 people may get these
- allergic reaction (possibly causing a rash, itching or more rarely shortness of breath. If you have trouble breathing or swallowing, contact your doctor or go to a hospital straight away)
- tender lumps in the breasts and oozing of milky fluid from the nipples. These effects usually disappear if treatment is stopped or if the dose of Cyprostat is reduced
less than 1 in every 10,000 people may get these
- benign (non-malignant) liver tumours,
- some forms of liver cancer (malignant liver tumours). Liver tumours may lead to bleeding in the abdomen, which can be life-threatening. If you have any new stomach discomfort or pain that does not go away quickly, you must tell your doctor straightaway
Effects of Cyprostat on sperm
After you have been taking this medicine for some months, you may not have any sperm in your ejaculate. You will probably become unable to make anyone pregnant, but note that this does not happen at once. Do not rely on this medicine for contraception at any time. While the overall number of sperm that you produce will be reduced, more of your sperm than usual will be abnormal in shape. Some people think these abnormal sperm might possibly produce abnormal babies. Your doctor will be able to advise you further if you are thinking of having children.
Other changes that have been reported include:
- blood clots have been reported in patients taking this medicine but they have not definitely been linked to Cyprostat.
- the occurrence of meningiomas (a generally benign tumour of the tissue layer between the brain and the skull) has been reported in association with longer term use (years) of Cyprostat at doses of 25 mg per day and above
- dry skin and improvement in acne
- temporary patchy loss of body hair, a reduction in hair growth on the body, an increased growth of hair on the head, lightening of hair colour, a female type of pubic hair growth
- effects on the blood (anaemia) have been reported rarely during long term treatment with this medicine. Your doctor may arrange for you to have regular blood tests during treatment to monitor this
- thinning of the bones (osteoporosis)
- tiredness, fatigue, loss of appetite, weight loss, low blood sugar, low blood pressure, dehydration, headache, irritability and depression, aching muscles (often muscle weakness), abdominal pain, a craving for salty foods, feeling or being sick and diarrhoea (suppressed adrenal glands).
After stopping treatment
After stopping treatment, the decrease in sex drive, reduction in sperm count and breast swelling will generally go back to normal.
If any of the side effects gets serious, or you notice any side effects not listed in this leaflet, please tell your doctor.
How to store Cyprostat
- Keep out of the reach and sight of children.
- Do not use Cyprostat after the expiry date which is stated on the box after the letters ‘EXP’. The expiry date refers to the last day of that month.
- Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer required. These measures will help to protect the environment.
What Cyprostat l00 mg contains
- the active ingredient is cyproterone acetate. Each tablet contains l00 mg of cyproterone acetate.
- the other ingredients are: maize starch, povidone 25000, magnesium stearate (E572), lactose.
What Cyprostat l00 mg looks like and contents of the pack
Each pack of Cyprostat l00 mg contains 84 tablets as 7 blister strips of 12 tablets.