ZYTIGA® 500 mg film-coated tablets – patient leaflet, side effects, dosage

1 What ZYTIGA is and what it is used for

ZYTIGA contains a medicine called abiraterone acetate. It is used to treat prostate cancer in adult men that has spread to other parts of the body. ZYTIGA stops your body from making testosterone; this can slow the growth of prostate cancer.

When ZYTIGA is prescribed for the early stage of disease where it is still responding to hormone therapy, it is used with a treatment that lowers testosterone (androgen deprivation therapy). When you take this medicine your doctor will also prescribe another medicine called prednisone or prednisolone. This is to lower your chances of getting high blood pressure, having too much water in your body (fluid retention), or having reduced levels of a chemical known as potassium in your blood.

2 What you need to know before you take ZYTIGA

Do not take ZYTIGA

• 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. ZYTIGA 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.

Warnings and precautions

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.

ZYTIGA 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 ZYTIGA 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.

Blood monitoring

ZYTIGA 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.

Children and adolescents

This medicine is not for use in children and adolescents. If ZYTIGA 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.

Other medicines and ZYTIGA

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 ZYTIGA 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 ZYTIGA. This may lead to side effects or to ZYTIGA 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.

ZYTIGA with food

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

Pregnancy and breast-feeding

ZYTIGA is not for use in women.

• 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.

Driving and using machines

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

ZYTIGA contains lactose and sodium

• ZYTIGA contains lactose. If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.
• This medicine contains 27 mg sodium (main component of cooking/table salt) in a two tablet daily dose. This is equivalent to 1.35% of the recommended maximum daily dietary intake of sodium for an adult.

3 How to take ZYTIGA

Always take this medicine exactly as your doctor has told you. Check with your doctor or pharmacist if you are not sure.

How much to take

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

Taking this medicine

• Take this medicine by mouth.
• Do not take ZYTIGA with food. Taking ZYTIGA with food may cause more of the medicine to be absorbed by the body than is needed and this may cause side effects.
• Take ZYTIGA tablets as a single dose once daily on an empty stomach. ZYTIGA must be taken at least two hours after eating and food must not be eaten for at least one hour after taking ZYTIGA. (see section 2, “ZYTIGA with food”).
• Swallow the tablets whole with water.
• Do not break the tablets.
• ZYTIGA is 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 ZYTIGA.
• 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 ZYTIGA and prednisone or prednisolone.

If you take more ZYTIGA than you should

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

If you forget to take ZYTIGA

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

If you stop taking ZYTIGA

Do not stop taking ZYTIGA or prednisone or prednisolone unless your doctor tells you to. If you have any further questions on the use of this medicine, ask your doctor or pharmacist.

4 Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Stop taking ZYTIGA and see a doctor immediately if you notice any of the following:

• Muscle weakness, muscle twitches or a pounding heart beat (palpitations). These may be signs that the level of potassium in your blood is low.

Other side effects include:

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), and 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. ZYTIGA in combination with prednisone or prednisolone may increase bone loss.

Reporting of side effects

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 at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.

5 How to store ZYTIGA

• Keep this medicine out of the sight and reach of children.
• Do not use this medicine after the expiry date which is stated on the carton, cardboard wallet, and the blister. The expiry date refers to the last day of that month.
• This medicinal product does not require any special storage conditions.
• Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help to protect the environment.

6 Contents of the pack and other information

What ZYTIGA contains

• The active substance is abiraterone acetate. Each film-coated tablet contains 500 mg abiraterone acetate.
• The other ingredients are microcrystalline cellulose (silicified); croscarmellose sodium; hypromellose 2910 (15 mPa.S); lactose monohydrate; magnesium stearate; colloidal anhydrous silica; and sodium laurilsulfate (see section 2, “ZYTIGA contains lactose and sodium”) The film-coating contains iron oxide black (E172); iron oxide red (E172); macrogol 3350; polyvinyl alcohol; talc; and titanium dioxide.

What ZYTIGA looks like and contents of the pack

• ZYTIGA tablets are purple, oval-shaped, film-coated (20 mm long by 10 mm wide) with “AA” written on one side and “500” on the other side.

  Each 28 day carton contains 56 film-coated tablets in 4 cardboard wallets of 14 film-coated tablets each.

  Each 30 day carton contains 60 film-coated tablets in 5 cardboard wallets of 12 film-coated tablets each.

• Not all pack sizes may be marketed.

Marketing Authorisation Holder

Janssen-Cilag Ltd

50-100 Holmers Farm Way

High Wycombe

Buckinghamshire

HP12 4EG

UK

Manufacturer

Janssen-Cilag SpA

Via C. Janssen

Borgo San Michele

I-04100 Latina, Italy

For information in large print, tape, CD or Braille, telephone 0800 7318450.

This leaflet was last revised in 09/2021.