Cladribine (Leustat ®, LITAK ®)
Cladribine is a chemotherapy drug used to treat hairy cell leukaemia and B-cell chronic lymphocytic leukaemia(CLL).
This information should ideally be read with our general information about chemotherapy and your type of cancer.
How cladribine is given
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You usually have cladribine in the chemotherapy day unit. A nurse will give it to you. During treatment you usually see a cancer doctor, a chemotherapy nurse or a specialist nurse. This is who we mean when we mention doctor or nurse in this information.
Before or on the day of treatment, a nurse or person trained to take blood (phlebotomist) will take a blood sample from you. This is to check that it is okay for you to have chemotherapy.
You will also see a doctor or nurse before you have chemotherapy. They will ask you about how you have been. If your blood results are alright on the day of your treatment, the pharmacist will prepare your chemotherapy. Your nurse will tell you when your treatment is likely to be ready.
Cladribine is given in different ways to treat hairy cell leukaemia or CLL.
For hairy cell leukaemia it can be given as an injection under the skin (subcutaneous injection). It’s given daily for five days or weekly for five to six weeks. You can have the treatment as an outpatient.
For hairy cell leukaemia and CLL, your nurse can give you cladribine as an injection into a vein. They give you anti-sickness drugs and the chemotherapy through one of the following:
a short thin tube (cannula) the nurse puts into a vein in your arm or hand
a fine tube that goes under the skin of your chest and into a vein close by (central line)
a fine tube that is put into a vein in your arm and goes up into a vein in your chest (PICC line).
Your nurse gives you cladribine into your vein either through a drip (infusion) or a pump. You have chemotherapy as a course of several sessions (or cycles) over a few months.
If you have CLL, treatment can be given as a drip into your cannula or line over two hours each day, for five days. Each cycle usually takes 28 days (four weeks). You will have your infusion on days 1 to 5 of the cycle. At the end of the 28 days, you start your second cycle. This is the same as the first cycle. You can have up to six cycles.
If you have hairy cell leukaemia, treatment can be given as a continuous infusion for seven days. This is called a single cycle. The treatment is given through a small portable pump attached to a central or PICC line. This may involve a short stay in hospital. If there are no problems, the rest of the treatment can be given at home.
When the chemotherapy is being given
Some people might have side effects while they are having the chemotherapy. These may include:
Cladribine may cause an allergic reaction while it’s being given. Your nurse will check you for this. If you have a reaction, they will treat it quickly. Signs of a reaction can include: a rash; feeling itchy, flushed or short of breath; swelling of your face or lips; feeling dizzy; having pain in your tummy, back or chest; or feeling unwell. Tell your nurse straight away if you have any of these symptoms.
Pain along the vein
If you have this, tell your nurse straight away. They will check your drip site and slow the drip to ease the pain.
There are several different types of pump, but all are small enough to be carried on a belt or in a holster. Before you go home, your nurse should explain how to care for it and what to do if something goes wrong. You will also be told when to come back to have the pump disconnected.
The nurse or pharmacist will give you anti-sickness drugs to take. Take all your tablets exactly as they have been explained to you.
Possible side effects of cladribine
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We explain the most common side effects of cladribine here. We don’t include all the rare ones that are unlikely to affect you.
You may get some of the side effects we mention but you are very unlikely to get all of them. If you are having other chemotherapy drugs as well, you may have some side effects that we don’t list here. Always tell your doctor or nurse about any side effects you have.
Your doctor can prescribe drugs to help control some side effects. It is very important to take them exactly as explained. They will be more likely to work better for you. Your nurse will give you advice about managing your side effects. After your treatment is over, the side effects will start to improve.
Contact the hospital
Your nurse will give you telephone numbers for the hospital. You can call them if you feel unwell or need advice any time of day or night. Save these numbers in your phone or keep them somewhere safe.
Risk of infection
Chemotherapy can reduce the number of white blood cells in your blood. This will make you more likely to get an infection. When the number of white blood cells is low, it’s called neutropenia.
Contact the hospital straight away on the contact number you’ve been given if:
your temperature goes over 37.5°C (99.5°F) or over 38°C (100.4°F), depending on the advice given by your chemotherapy team
you suddenly feel unwell, even with a normal temperature
you have symptoms of an infection – this can include feeling shaky, a sore throat, a cough, diarrhoea or needing to pass urine a lot.
The number of white blood cells usually increase steadily and return to normal before your next treatment. You will have a blood test before having more chemotherapy. If your white blood cells are still low, your doctor may delay your treatment for a short time.
Bruising and bleeding
Cladribine can reduce the number of platelets in your blood. Platelets are cells that help the blood to clot. Tell your doctor if you have any bruising or bleeding you can’t explain. This includes nosebleeds, bleeding gums, blood spots or rashes on the skin. Some people may need a drip to give them extra platelets.
Anaemia (low number of red blood cells)
Cladribine can reduce the number of red blood cells in your blood. These cells carry oxygen around the body. If the number of red blood cells is low, you may be tired and breathless. Tell your doctor or nurse if you feel like this. If you are very anaemic, you may need a drip to give you extra red cells (blood transfusion).
Build up of fluid
You may put on weight or your ankles and legs may swell because of fluid building up. Tell your doctor or nurse if fluid builds up. If your ankles and legs swell it can help to put your legs up on a foot stool or cushion. The swelling gets better after your treatment ends.
Chemotherapy may affect your skin. Your doctor or nurse can tell you what to expect. If your skin feels dry, try using an unperfumed moisturising cream every day. Always tell your doctor or nurse about any skin changes. They can give you advice and may prescribe creams or medicines to help. Any changes to your skin are usually temporary and improve when treatment finishes.
Feeling very tired is a common side effect. It’s often worse towards the end of treatment and for some weeks after it’s finished. Try to pace yourself and get as much rest as you need. It helps to balance this with some gentle exercise, such as short walks. If you feel sleepy, don’t drive or operate machinery.
This may happen in the first few days after chemotherapy. Your doctor will prescribe anti-sickness (anti-emetic) drugs to help prevent or control sickness. Take the drugs exactly as your nurse or pharmacist explains to you. It’s easier to prevent sickness than to treat it after it has started.
If you still feel sick or are vomiting, contact the hospital as soon as possible. They can give you advice and change the anti-sickness drug to one that works better for you.
Loss of appetite
You may lose your appetite during your treatment. Try to eat small meals regularly. Don’t worry if you don’t eat much for a day or two. If your appetite doesn’t improve after a few days, let your nurse or dietitian know. They can give you advice on getting more calories and protein in your diet. They may give you food supplements or meal replacement drinks to try. Your doctor can prescribe some of these and you can buy them from chemists.
Your doctor can prescribe drugs to control diarrhoea. Let them know if it is severe or if it doesn’t get better. Make sure you drink at least two litres (three and a half pints) of fluids every day if you have diarrhoea.
Cladribine may make you constipated and cause tummy pain. Drinking at least two litres of fluids (three and a half pints) every day will help. Try to eat more foods that contain fibre (such as fruit, vegetables and wholemeal bread) and take some regular gentle exercise.
Cladribine may cause headaches. If this happens, let your doctor or nurse know. They can give you painkillers.
Muscle and/or joint pain
You may get pain in your joints or muscles for a few days after chemotherapy. Tell your doctor if this happens so they can prescribe painkillers. Let them know if the pain does not get better. Try to get plenty of rest. Taking regular warm baths may help.
Changes in the way the kidneys and liver work
Treatment can affect how your kidneys and liver work. This is usually mild and goes back to normal after treatment. You will have blood tests before chemotherapy to check how well your kidneys and liver are working.
Raised levels of uric acid in the blood
Cladribine may cause the leukaemia cells to break down quickly. This releases uric acid (a waste product) into the blood. Too much uric acid can cause swelling and pain in the joints, which is called gout.
Your doctor may give you tablets called allopurinol (zyloric ®) to help prevent this. Drinking at least two litres of fluid a day will also help. You will have regular blood tests to check the uric acid levels.
Your eyes may become watery and feel sore. Your doctor can prescribe eye drops to help with this. If your eyes get red and inflamed (conjunctivitis), tell your doctor. This is because you may need antibiotic eye drops.
Less common side effects of cladribine
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Effects on the heart
Cladribine may cause changes to your heartbeat. This doesn’t usually cause serious problems and goes back to normal after treatment finishes. Let your doctor know if you notice your heartbeat is fast or irregular. If you get pain in your chest or feel dizzy, go to your doctor straight away.
Effects on the lungs
Cladribine can cause changes to the lungs. Always tell your doctor if you develop wheezing, a cough, fever or feel breathless. You should also let them know if any existing breathing problems get worse. If necessary, they can arrange for you to have tests to check your lungs.
Effects on the nervous system
Cladribine can affect the nervous system. You may feel anxious or restless, have problems sleeping or experience mood changes. You may feel dizzy or unsteady. You may have pins and needles or feel tingling in your arms and legs.
Tell your doctor or nurse straight away if you notice any of these symptoms. They may make some changes to your treatment if they become a problem for you. It’s important not to drive or operate machinery if you notice these effects.
It’s important to let your doctor know straight away if you feel unwell or have any severe side effects, even if they’re not mentioned here.
Other information about cladribine
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After treatment with cladribine any blood and platelets you are given should first be treated with radiation. This lowers the risk of the donated blood cells reacting against your own. It won’t damage the blood or make you radioactive.
Your doctor will record in your medical notes that you should only be given irradiated blood products. They’ll also give you a card to carry in case you’re treated at another hospital. Keep this card with you at all times and remind your hospital team that you need irradiated blood or platelets.
Blood clot risk
Cancer increases the chance of a blood clot (thrombosis) and chemotherapy can add to this. A clot can cause symptoms such as pain, redness and swelling in a leg, breathlessness and chest pain. Contact your doctor straight away if you have any of these symptoms. A blood clot is serious but your doctor can treat it with drugs that thin the blood. Your doctor or nurse can give you more information.
Some medicines can interact with chemotherapy or be harmful when you are having chemotherapy. This includes medicines you can buy in a shop or chemist. Tell your doctor about any medicines you are taking, including over-the-counter drugs, complementary therapies and herbal drugs.
Cladribine may affect your fertility (being able to get pregnant or father a child). If you are worried about this, you can talk to your doctor or nurse before treatment starts.
Your doctor will advise you not to become pregnant or to father a child during treatment. This is because the drugs may harm a developing baby. It’s important to use effective contraception during and for a few months after chemotherapy. You can talk to your doctor or nurse about this.
If you have sex within the first couple of days of having chemotherapy you need to use a condom. This is to protect your partner in case there is any chemotherapy in semen or vaginal fluid.
Women are advised not to breastfeed during treatment and for a few months after. This is in case there is chemotherapy in their breast milk.
Medical and dental treatment
If you need to go into hospital for any reason other than cancer, always tell the doctors and nurses that you are having chemotherapy. Give them contact details for your cancer doctor.
Talk to your cancer doctor or nurse if you think you need dental treatment. Always tell your dentist you are having chemotherapy.
This section has been compiled using information from a number of reliable sources including:
electronic Medicines Compendium (eMC). medicines.org.uk (accessed July 2013).
Perry MC. The Chemotherapy Source Book. 5th edition. 2012 Lippincott Williams and Wilkins.
With thanks to Catherine Loughran, Lead Pharmacist Haematology who reviewed this edition.
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