• Keep this leaflet. You may need to read it again.
• If you have any further questions, ask your doctor, pharmacist or nurse.
• If you get any side effects talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. See section 4.

1. What Azacitidine Seacross is and what it is used for
2. What you need to know before you use Azacitidine Seacross
3. How to use Azacitidine Seacross
4. Possible side effects
5 How to store Azacitidine Seacross
6. Contents of the pack and other information

Azacitidine Seacross is an anti-cancer agent which belongs to a group of medicines called ‘anti-metabolites’. Azacitidine Seacross contains the active substance ‘azacitidine’.

Azacitidine Seacross is used in adults who are not able to have a stem cell transplantation to treat:

• higher-risk myelodysplastic syndromes (MDS).
• chronic myelomonocytic leukaemia (CMML).
• acute myeloid leukaemia (AML).

These are diseases which affect the bone marrow and can cause problems with normal blood cell production.

Azacitidine Seacross works by preventing cancer cells from growing. Azacitidine becomes incorporated into the genetic material of cells (ribonucleic acid (RNA) and deoxyribonucleic acid (DNA)). It is thought to work by altering the way the cell turns genes on and off and also by interfering with the production of new RNA and DNA. These actions are thought to correct problems with the maturation and growth of young blood cells in the bone marrow that cause myelodysplastic disorders, and to kill cancerous cells in leukaemia.

Talk to your doctor or nurse if you have any questions about how Azacitidine Seacross works or why this medicine has been prescribed for you.

• if you are allergic to azacitidine or any of the other ingredients of this medicine (listed in section 6).
• if you have advanced liver cancer.
• if you are breast-feeding.

Talk to your doctor, pharmacist or nurse before using Azacitidine Seacross:

• if you have decreased counts of platelets, red or white blood cells.
• if you have kidney disease.
• if you have liver disease.
• if you have ever had a heart condition or heart attack or any history of lung disease.

Azacitidine Seacross can cause a serious immune reaction called ‘differentiation syndrome’ (see section 4).

Blood test

You will have blood tests before you begin treatment with Azacitidine Seacross and at the start of each period of treatment (called a ‘cycle’). This is to check that you have enough blood cells and that your liver and kidneys are working properly.

Azacitidine Seacross is not recommended for use in children and adolescents below the age of 18.

Tell your doctor or pharmacist if you are using, have recently used or might use any other medicines. This is because Azacitidine Seacross may affect the way some other medicines work. Also, some other medicines may affect the way Azacitidine Seacross works.

Pregnancy

You should not use Azacitidine Seacross during pregnancy as it may be harmful to the baby.

If you are a woman who can become pregnant you should use an effective method of contraception while taking Azacitidine Seacross and for 6 months after stopping treatment with Azacitidine Seacross.

Tell your doctor straight away if you become pregnant during treatment.

If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.

Breast-feeding

You should not breast-feed when using Azacitidine Seacross. It is not known if this medicine passes into human milk.

Fertility

Men should not father a child while receiving treatment with Azacitidine Seacross. Men should use an effective method of contraception while taking Azacitidine Seacross and for 3 months after stopping treatment with Azacitidine Seacross.

Talk to your doctor if you wish to conserve your sperm before starting this treatment.

Do not drive or use any tools or machines if you experience side effects, such as tiredness.

• Drowsiness, shaking, jaundice, abdominal bloating and easy bruising. These may be symptoms of liver failure and can be life-threatening.
• Swelling of the legs and feet, back pain, reduced passing of water, increased thirst, rapid pulse, dizziness and nausea, vomiting or reduced appetite and feelings of confusion, restlessness or fatigue. These may be symptoms of kidney failure and can be life-threatening.
• A fever. This could be due to an infection as a result of having low levels of white blood cells, which can be life-threatening.
• Chest pain or shortness of breath which may be accompanied with a fever. This may be due to an infection of the lung called “pneumonia”, and can be life-threatening.
• Bleeding. Such as blood in the stools due to bleeding in the stomach or gut, or such as bleeding inside your head. These may be symptoms of having low levels of platelets in your blood.
• Difficulty breathing, swelling of the lips, itching or rash. This may be due to an allergic (hypersensitivity) reaction.

Other side effects include:

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

• Reduced red blood count (anaemia). You may feel tired and pale.
• Reduced white blood cell count. This may be accompanied by a fever. You are also more likely to get infections.
• A low blood platelet count (thrombocytopenia). You are more prone to bleeding and bruising.
• Constipation, diarrhoea, nausea, vomiting.
• Pneumonia.
• Chest pain, being short of breath.
• Tiredness (fatigue).
• Injection site reaction including redness, pain or a skin reaction.
• Loss of appetite.
• Joint aches.
• Bruising.
• Rash.
• Red or purple spots under your skin.
• Pain in your belly (abdominal pain).
• Itching.
• Fever.
• Sore nose and throat.
• Dizziness.
• Headache.
• Having trouble sleeping (insomnia).
• Nosebleeds (epistaxis).
• Muscle aches.
• Weakness (asthenia).
• Weight loss.
• Low levels of potassium in your blood.

Common side effects (may affect up to 1 in 10 people)

• Bleeding inside your head.
• An infection of the blood caused by bacteria (sepsis). This may be due to low levels of white cells in your blood.
• Bone marrow failure. This can cause low levels of red and white blood cells and platelets.
• A type of anaemia where your red and white blood cells and platelets are reduced.
• An infection in your urine.
• A viral infection causing cold sores (herpes).
• Bleeding gums, bleeding in the stomach or gut, bleeding from around your back passage due to piles (haemorrhoidal haemorrhage), bleeding in your eye, bleeding under your skin, or into your skin (haematoma).
• Blood in your urine.
• Ulcers of your mouth or tongue.
• Changes to your skin at the injection site. These include swelling, a hard lump, bruising, bleeding into your skin (haematoma), rash, itching and changes in the skin colour.
• Redness of your skin.
• Skin infection (cellulitis).
• An infection of the nose and throat, or sore throat.
• Sore or runny nose or sinuses (sinusitis).
• High or low blood pressure (hypertension or hypotension).
• Being short of breath when you move.
• Pain in your throat and voicebox.
• Indigestion.
• Lethargy.
• Feeling generally unwell.
• Anxiety.
• Being confused.
• Hair loss.
• Kidney failure.
• Dehydration.
• White coating covering tongue, inner cheeks, and sometimes on the roof of your mouth, gums and tonsils (oral fungal infection).
• Fainting.
• A fall in blood pressure when standing (orthostatic hypotension) leading to dizziness when moving to a standing or sitting position.
• Sleepiness, drowsiness (somnolence).
• Bleeding due to a catheter line.
• A disease affecting the gut which can result in fever, vomiting and stomach pain (diverticulitis).
• Fluid around the lungs (pleural effusion).
• Shivering (chills).
• Muscle spasms.
• Raised itchy rash on the skin (urticaria).
• Collection of fluid around the heart (pericardial effusion)

Uncommon side effects (may affect up to 1 in 100 people)

• Allergic (hypersensitivity) reaction.
• Shaking.
• Liver failure.
• Large plum-coloured, raised painful patches on the skin with fever.
• Painful skin ulceration (pyoderma gangrenosum).
• Inflammation of the lining around the heart (pericarditis).

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

• Dry cough.
• Painless swelling in the finger tips (clubbing).
• Tumour lysis syndrome - Metabolic complications that can occur during treatment of cancer and sometimes even without treatment. These complications are caused by the product of dying cancer cells and may include the following: changes to blood chemistry; high potassium, phosphorus, uric acid, and low calcium consequently leading to changes in kidney function, heartbeat, seizures, and sometimes death.

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

• Infection of the deeper layers of skin, which spreads quickly, damaging the skin and tissue, which can be life-threatening (necrotizing fasciitis).
• Serious immune reaction (differentiation syndrome) that may cause fever, cough, difficulty breathing, rash, decreased urine, low blood pressure (hypotension), swelling of the arms or legs and rapid weight gain.
• Inflammation of blood vessels in the skin which may result in rash (cutaneous vasculitis).

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via Yellow Card Scheme at website: 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.

• The active substance is azacitidine. One vial contains 100 mg azacitidine. After reconstitution with 4 mL of water for injections, the reconstituted suspension contains 25 mg/mL azacitidine.
• The other ingredient is mannitol (E421).

Azacitidine Seacross is a white powder for suspension for injection and is supplied in a glass vial containing 100 mg of azacitidine. Each pack contains one vial of Azacitidine Seacross.