• Keep this leaflet. You may need to read it again.
• If you have any further questions, ask your doctor or pharmacist.
• This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.
• If you get any side effects talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.

1. What Abiraterone Tablets are and what they are used for
2. What you need to know before you take Abiraterone Tablets
3. How to take Abiraterone Tablets
4. Possible side effects
5. How to store Abiraterone Tablets
6. Contents of the pack and other information

• if you are allergic to abiraterone acetate or any of the other ingredients of this medicine (listed in section 6).
• if you are a woman, especially if pregnant. Abiraterone acetate is for use in male patients only.
• if you have severe liver damage.
• in combination with Ra-223 (which is used to treat prostate cancer).

Do not take this medicine if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before taking this medicine.

Talk to your doctor or pharmacist before taking this medicine:

• if you have liver problems
• if you have been told you have high blood pressure or heart failure or low blood potassium (low blood potassium may increase the risk of heart rhythm problems)
• if you have had other heart or blood vessel problems
• if you have an irregular or rapid heart rate
• if you have shortness of breath
• if you have gained weight rapidly
• if you have swelling in the feet, ankles, or legs
• if you have taken a medicine known as ketoconazole in the past for prostate cancer
• about the need to take this medicine with prednisone or prednisolone
• about possible effects on your bones
• if you have high blood sugar.

Tell your doctor if you have been told you have any heart or blood vessel conditions, including heart rhythm problems (arrhythmia), or are being treated with medicines for these conditions.

Tell your doctor if you have yellowing of the skin or eyes, darkening of the urine, or severe nausea or vomiting, as these could be signs or symptoms of liver problems. Rarely, failure of the liver to function (called acute liver failure) may occur, which can lead to death.

Decrease in red blood cells, reduced sex drive (libido), muscle weakness and/or muscle pain may occur.

Abiraterone acetate must not be given in combination with Ra-223 due to a possible increase in the risk of bone fracture or death.

If you plan to take Ra-223 following treatment with Abiraterone acetate and prednisone/prednisolone, you must wait 5 days before starting treatment with Ra-223.

If you are not sure if any of the above apply to you, talk to your doctor or pharmacist before taking this medicine.

Abiraterone acetate may affect your liver, and you may not have any symptoms. When you are taking this medicine, your doctor will check your blood periodically to look for any effects on your liver.

This medicine is not for use in children and adolescents. If this medicine is accidentally ingested by a child or adolescent, go to the hospital immediately and take the package leaflet with you to show to the emergency doctor.

Ask your doctor or pharmacist for advice before taking any medicine.

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines. This is important because this medicine may increase the effects of a number of medicines including heart medicines, tranquilisers, some medicines for diabetes, herbal medicines (e.g., St John’s wort) and others. Your doctor may want to change the dose of these medicines. Also, some medicines may increase or decrease the effects of Abiraterone acetate. This may lead to side effects or to Abiraterone acetate not working as well as it should.

Androgen deprivation treatment may increase the risk of heart rhythm problems. Tell your doctor if you are receiving medicine

• used to treat heart rhythm problems (e.g. quinidine, procainamide, amiodarone and sotalol)
• known to increase the risk of heart rhythm problems [e.g. methadone (used for pain relief and part of drug addiction detoxification), moxifloxacin (an antibiotic), antipsychotics (used for serious mental illnesses)].

Tell your doctor if you are taking any of the medicines listed above.

• This medicine must not be taken with food (see section 3, “Taking this medicine”).
• Taking this medicine with food may cause side effects.

Abiraterone acetate is not for use in women.

Women who are pregnant or who may be pregnant should wear gloves if they need to touch or handle this medicine.

• This medicine may cause harm to the unborn child if it is taken by women who are pregnant.
• If you are having sex with a woman who can become pregnant, use a condom and another effective birth control method.
• If you are having sex with a pregnant woman, use a condom to protect the unborn child.

This medicine is not likely to affect your being able to drive and use any tools or machines.

Abiraterone Tablets contain lactose (a type of sugar). If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicine.

This medicine contains 27 mg of sodium (main component of cooking/table salt) in each dose of two tablets. This is equivalent to 1.35% of the recommended maximum daily dietary intake of sodium for an adult.

The recommended dose is 1,000 mg (two tablets) once a day.

• Take this medicine by mouth.
• Do not take this medicine with food.
• Take Abiraterone Tablets at least one hour before or at least two hours after eating (see section 2, “Abiraterone Tablets with food”).
• Swallow the tablets whole with water.
• Do not break the tablets.
• Abiraterone Tablets are taken with a medicine called prednisone or prednisolone. Take the prednisone or prednisolone exactly as your doctor has told you.
• You need to take prednisone or prednisolone every day while you are taking Abiraterone Tablets.
• The amount of prednisone or prednisolone you take may need to change if you have a medical emergency. Your doctor will tell you if you need to change the amount of prednisone or prednisolone you take. Do not stop taking prednisone or prednisolone unless your doctor tells you to.

Your doctor may also prescribe other medicines while you are taking Abiraterone Tablets and prednisone or prednisolone.

If you take more than you should, talk to your doctor or go to a hospital immediately.

• If you forget to take Abiraterone Tablets or prednisone or prednisolone, take your usual dose the following day.
• If you forget to take Abiraterone Tablets or prednisone or prednisolone for more than one day, talk to your doctor without delay.

Do not stop taking Abiraterone Tablets or prednisone or prednisolone unless your doctor tells you to.

• Muscle weakness
• muscle twitches
• a pounding heartbeat (palpitations).

These may be signs that the level of potassium in your blood is low.

Very common (may affect more than 1 in 10 people)

• fluid in your legs or feet
• low blood potassium
• liver function test increases
• high blood pressure
• urinary tract infection
• diarrhoea.

Common (may affect up to 1 in 10 people)

• high fat levels in your blood
• chest pain
• irregular heart beat (atrial fibrillation)
• heart failure
• rapid heart rate
• severe infections called sepsis
• bone fractures
• indigestion
• blood in urine
• rash.

Uncommon (may affect up to 1 in 100 people)

• adrenal gland problems (related to salt and water problems)
• abnormal heart rhythm (arrhythmia)
• muscle weakness and/or muscle pain.

Rare (may affect up to 1 in 1,000 people)

• lung irritation (also called allergic alveolitis).
• failure of the liver to function (also called acute liver failure).

Not known (frequency cannot be estimated from the available data)

• Heart attack, changes in ECG - electrocardiogram (QT prolongation)
• Serious allergic reactions with difficulty swallowing or breathing, swollen face, lips, tongue or throat, or an itchy rash.

Bone loss may occur in men treated for prostate cancer. Abiraterone acetate in combination with prednisone or prednisolone may increase bone loss.

If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme, website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Stor By reporting side effects you can help provide more information on the safety of this medicine.

• The active substance is abiraterone acetate. Each film-coated tablet contains 500 mg abiraterone acetate.
• The other ingredients are microcrystalline cellulose, croscarmellose sodium, hypromellose, lactose monohydrate, magnesium stearate, colloidal anhydrous silica and sodium laurilsulfate (see section 2, “Abiraterone Tablets contain lactose and sodium”). The film-coating contains iron oxide black (E172), iron oxide red (E172), macrogol 3350, polyvinyl alcohol, talc and titanium dioxide.

Purple, oval-shaped, biconvex film-coated tablets (20 mm long by 10 mm wide), debossed with “S500” on one side and plain on the other side.

Abiraterone Tablets are available in blister packs.

Pack size: outer carton containing 56 film-coated tablets.