Estramustine for prostate cancer
Estracyt
Granskad av Sid DajaniSenast uppdaterad av Michael Stewart, MRPharmSLast updated 19 dec 2022
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To begin with, it is usual to be prescribed 4-6 capsules to take over the course of a day. This dose may be adjusted as your treatment continues.
Do not eat any food or drink any milk for one hour before you take estramustine, or for two hours afterwards.
If you feel suddenly unwell or experience any worrying symptoms, speak with your doctor or clinic straightaway.
At a glance
Estramustine is a chemotherapy medicine for advanced prostate cancer.
It reduces cancer cells and lowers testosterone, slowing cancer growth.
Take capsules on an empty stomach, one hour before or two hours after food.
Do not take with milk or medicines containing calcium, magnesium or aluminium.
Common side-effects include feeling sick, vomiting, diarrhoea, and swollen feet.
Tell your doctor straight away if you have a high temperature, chest pain, or breathing difficulties.
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About estramustine
Typ av medicin | An alkylating chemotherapy medicine |
Används för | Treatment of advanced prostate cancer |
Även kallad | Estracyt® |
Tillgänglig som | Kapslar |
Prostate cancer is a cancer which develops from cells in the prostate gland. It is the most common cancer in men in the UK. If the cancer spreads to other parts of your body, it is referred to as advanced prostate cancer. You may be offered anti-cancer medicine (chemotherapy) if you have advanced prostate cancer.
Estramustine is a chemotherapy medicine which reduces the number of cancer cells in your body by stopping cancer cells from multiplying. It also reduces the concentration of the male hormone testosterone. Cancer cells in other parts of your body need testosterone to grow and multiply, so this slows down the growth of the cancer which has spread.
Before taking estramustine
Tillbaka till innehållSome 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 estramustine it is important that your doctor or pharmacist knows:
If your partner is pregnant or breastfeeding.
If you have high blood pressure (hypertension).
If you have any heart problems.
If you have blood vessel disease, or if you have had any blood clot problems.
If you have high blood sugar levels (diabetes mellitus).
If you have ever had a stomach or duodenal ulcer.
If you have epilepsy or if you get migraine headaches.
If you have been told you have high levels of calcium in your blood.
If you have any liver or kidney problems.
If you have problems with fluid retention, such as swollen feet or ankles.
If you have an infection or feel unwell.
If you have a rare inherited blood disorder called porphyria.
Om du tar eller använder några andra läkemedel. Detta inkluderar alla läkemedel du tar som finns att köpa utan recept, samt växtbaserade och komplementära läkemedel.
Om du någonsin har haft en allergisk reaktion mot en medicin.
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How to take estramustine
Tillbaka till innehållEstramustine will be prescribed for you by a doctor who is a specialist and experienced in treating your condition. Take the capsules exactly as your doctor tells you to. It is usual to be prescribed 4-6 capsules to take over the course of a day to begin with, although this may be adjusted as your treatment continues. Doses may range between 1-10 capsules taken daily. If you are unsure about how or when to take the capsules, or if you have any other concerns, you should contact your doctor or hospital clinic for advice.
You should take the capsules when your stomach is empty, which means taking them one hour before eating food, or waiting until two hours afterwards. This is because food prevents estramustine from being absorbed by your body, which means the medicine is much less effective for you.
Swallow the capsules with a drink of water. Do not open, crush or chew them.
Before you start this treatment, read any printed information you have been given by your doctor, and the leaflet from inside your pack. The leaflet will give you more information about estramustine and a full list of side-effects which you may experience from taking it.
If you are sick shortly after taking a dose, or if you forget a dose, contact your doctor or clinic for advice on what to do. You will be told whether to take the dose again, or wait until the next dose is due.
Do not drink any milk, or take any medicines containing calcium, magnesium or aluminium at the same time as you take estramustine. Some antacid and laxative preparations contain these, so ask your pharmacist for advice before you buy or take any 'over-the-counter' medicines.
Få ut det mesta av din behandling
Tillbaka till innehållYou must try to keep your regular appointments with your doctor or hospital. This is so your doctor can check on your progress. You will need to have regular check-ups during your treatment, to monitor for unwanted side-effects.
Estramustine may lower the number of white cells in your blood, increasing the chance of you getting an infection. If possible, avoid people who you know are ill, and let your doctor know if you feel you are getting an infection.
While you are taking estramustine do not have any immunisations (vaccinations) without talking to your doctor first. Estramustine lowers your body's resistance so there is a chance that you may get an infection from some vaccines.
Om du ska genomgå en operation eller tandbehandling, informera den som utför behandlingen om vilka mediciner du tar.
Although there is a risk of reduced fertility with estramustine treatment, it is important that you do not father a child while you are being treated. Make sure you have discussed these issues with your doctor if you are sexually active.
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Can estramustine cause problems?
Tillbaka till innehållAlong with their useful effects, most medicines can cause side-effects although not everyone experiences them. Before you start treatment with estramustine, your doctor will discuss with you the possibility of unwanted side-effects occurring. The table below lists some of the most common ones associated with estramustine. You will find a full list in the manufacturer's information leaflet supplied with your medicine. You should let your doctor or clinic know as soon as possible if you experience any of the following:
Common estramustine side-effects - these affect fewer than 1 in 10 people who take this medicine | Vad kan jag göra om jag upplever detta? |
Feeling sick (nausea) or being sick (vomiting), diarrhoea (during the first couple of weeks) | Drink plenty of water to replace lost fluids and stick to simple foods. Let your doctor know, as medicines can be prescribed to help |
Swollen feet and ankles | Om det är besvärligt, prata med din läkare |
(impotence), and breast swelling | Your doctor will discuss these with you before you start treatment |
Less common, but more serious side-effects | Vad kan jag göra om jag upplever detta? |
A high temperature (fever), or symptoms of an infection | Let your doctor know omedelbart |
Sudden chest pain, or any difficulties breathing | Let your doctor know omedelbart |
Om du upplever några andra symtom som du tror kan bero på denna medicin, tala med din läkare eller apotekare.
How to store estramustine
Tillbaka till innehållFörvara alla läkemedel utom räckhåll och synhåll för barn.
Förvara på en sval, torr plats, borta från direkt värme och ljus.
Return any unused or unwanted capsules to your pharmacy to destroy. They will need special disposal.
Viktig information om alla läkemedel
Tillbaka till innehållViktig information om alla läkemedel
Ta aldrig mer än den föreskrivna dosen. Om du misstänker att du eller någon annan kan ha tagit en överdos av denna medicin, gå till akutmottagningen på ditt lokala sjukhus. Ta med behållaren, även om den är tom.
Denna medicin är för dig. Ge den aldrig till andra människor även om deras tillstånd verkar vara detsamma som ditt.
Behåll inte föråldrade eller oönskade mediciner. Ta dem till ditt lokala apotek som kommer att ta hand om dem åt dig.
Om du har några frågor om denna medicin, fråga din apotekare.
Rapportera biverkningar av ett läkemedel eller vaccin
Om du upplever biverkningar kan du rapportera dem online via Yellow Card website.

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Vanliga frågor
What type of cancer does estramustine treat, and how does it work?
Estramustine is an alkylating chemotherapy medicine used to treat advanced prostate cancer. This is prostate cancer that has spread to other parts of the body. It works by reducing the number of cancer cells in your body and also by lowering the concentration of the male hormone testosterone, which cancer cells need to grow and multiply. By doing this, it slows down the growth of the cancer.
Why is it important to take estramustine on an empty stomach?
You should take estramustine capsules when your stomach is empty, either one hour before eating food or two hours after. This is because food can prevent the medicine from being properly absorbed by your body, making it much less effective in treating the cancer.
Can I take other medicines or supplements while on estramustine?
You need to tell your doctor or pharmacist about all other medicines you are taking, including those bought without a prescription, herbal remedies, and complementary medicines. Specifically, you should not drink milk or take any medicines containing calcium, magnesium, or aluminium at the same time as estramustine. Some antacids and laxatives contain these ingredients, so check with your pharmacist before taking any 'over-the-counter' medicines.
What should I do if I forget to take a dose, or if I am sick after taking it?
If you are sick shortly after taking a dose, or if you forget a dose, you should contact your doctor or hospital clinic for advice. They will tell you whether to take the dose again or wait until your next scheduled dose.
Does estramustine have an impact on fertility or sexual activity?
Estramustine treatment carries a risk of reduced fertility. If you are sexually active, it is important to discuss these issues with your doctor, as you must not father a child while you are undergoing treatment.
What should I do if I feel unwell with a high temperature or symptoms of an infection while taking estramustine?
If you develop a high temperature (fever) or any symptoms of an infection, you should let your doctor know straight away. Estramustine can lower your white blood cell count, which increases your chance of getting an infection.
Are there any specific vaccines I should avoid while on estramustine?
While taking estramustine, you should not have any immunisations (vaccinations) without first speaking to your doctor. Because estramustine lowers your body's resistance, there is a risk that you could get an infection from some vaccines.
How should estramustine capsules be stored, and what should I do with unused medicine?
Estramustine capsules should be kept in a cool, dry place, away from direct heat and light, and out of the reach and sight of children. Any unused or unwanted capsules should be returned to your pharmacy for proper disposal, as they require special handling.
Vidare läsning och referenser
- Manufacturer's PIL, Estracyt Capsules®; Pfizer Limited, The electronic Medicines Compendium. Dated October 2020.
- Mediciner Komplett BNF 89:e Utgåvan; Brittiska Läkarföreningen och Kungliga Farmaceutiska Sällskapet i Storbritannien, London.
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About the authorView full bio

Michael Stewart, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

Sid Dajani
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
Artikelhistorik
Informationen på denna sida är skriven och granskad av kvalificerade kliniker.
Nästa granskning: 18 jun 2027
19 dec 2022 | Senaste versionen

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