Dasatinib is a targeted therapy drug used to treat chronic myeloid leukaemia (CML) and some types of acute lymphoblastic leukaemia (ALL).
Dasatinib is used to treat chronic myeloid leukaemia (CML) and acute lymphoblastic leukaemia (ALL). It may sometimes be used to treat other cancers. It is best to read this information with our general information about the type of cancer you have.
Dasatinib belongs to a group of targeted therapy drugs known as cancer growth inhibitors.
Your doctor will talk to you about this treatment and its possible side effects before you agree (consent) to have treatment.
You will be given dasatinib as an outpatient. It is given as capsules. Dasatinib can be given on its own.
During treatment you usually see a haematology doctor (doctor who treats blood cancers), a cancer nurse or specialist nurse, and a specialist pharmacist. This is who we mean when we mention doctor, nurse or pharmacist in this information.
You will have your blood checked regularly during treatment. A nurse or a person trained to take blood (phlebotomist) will take a blood sample from you. This is to check that your blood cells are at a safe level for you to have treatment. Your doctor will tell you when your blood will be checked.
You will see a doctor or nurse before you have treatment. They will ask you how you have been feeling. If your blood results are okay, the pharmacist will prepare your targeted therapy. Your nurse will tell you when your treatment is likely to be ready.
Your course of treatment
The nurse or pharmacist will give you the tablets to take home. Always take them exactly as explained. This is important to make sure they work as well as possible for you. You may be given tablets of different strengths.
Your nurse or pharmacist may also give you anti-sickness drugs and other medicines to take home. Take all your tablets exactly as they have been explained to you.
You usually continue taking dasatinib for as long as it is still working.
Taking dasatinib capsules
You usually take dasatinib once a day. Take the capsules at about the same time each day. Swallow them whole with a glass of water. They should not be chewed, opened or crushed You can take them with or without food.
If you forget to take the capsules, you should take the missed dose as soon as possible within the same day. If a full day has gone by, let your doctor or nurse know. Do not take a double dose unless your doctor tells you to.
During treatment with dasatinib you should avoid grapefruit, grapefruit juice or supplements that contain grapefruit. This is because it can affect how dasatinib works.
Antacids or medicines to reduce stomach acid such as ranitidine, omeprazole or Gaviscon® can affect how dasatinib works. Do not take antacids two hours before, or one hour after taking dasatinib.
During treatment with dasatinib, you should not use the herbal remedy St John’s wort. This is because it can make dasatinib less effective.
Other things to remember about your tablets:
- Wash your hands after taking your tablets and capsules.
- Other people should avoid direct contact with the tablets.
- Keep them in the original package and at room temperature, away from heat and direct sunlight.
- Keep them safe and out of sight and reach of children.
- If you are sick just after taking the tablets, contact the hospital. Do not take another dose.
- If your treatment is stopped return any unused tablets to the pharmacist.
We explain the most common side effects of this treatment here. We also include some less common side effects.
You may get some of the side effects we mention, but you are unlikely to get all of them. If you are also having treatment with other cancer drugs, you may have some side effects that we have not listed here. Always tell your doctor, nurse or pharmacist about any side effects you have.
Your doctor can give you drugs to help control some side effects. It is important to take them exactly as your nurse or pharmacist explains. This means they will be more likely to work for you. Your nurse will give you advice about managing your side effects. After your treatment is over, most side effects start to improve.
Serious and life-threatening side effects
Some cancer treatments can cause severe side effects. Rarely, these may be life-threatening. Your cancer doctor or nurse can explain the risk of these side effects to you.
Contact the hospital
Your nurse will give you telephone numbers for the hospital. If you feel unwell or need advice, you can call them at any time of the day or night. Save these numbers in your phone or keep them somewhere safe.
We cannot list every side effect for this treatment. There are some rare side effects that are not listed. You can visit the electronic Medicines Compendium (eMC) for more detailed information.
Risk of infection
This treatment can reduce the number of white blood cells in your blood. These cells fight infection. If the number of white blood cells is low, you are more likely to get an infection. A low white blood cell count is called neutropenia.
If you have an infection, it is important to treat it as soon as possible. Contact the hospital straight away on the 24-hour contact number you have if:
- your temperature goes over 37.5°C (99.5°F)
- you suddenly feel unwell, even with a normal temperature
- you have symptoms of an infection.
Symptoms of an infection include:
- feeling shivery
- a sore throat
- a cough
- needing to pass urine often.
It is important to follow any specific advice your cancer treatment team gives you.
You will have regular blood tests during treatment. If your white blood cell count is low, your doctor may reduce or delay your treatment for a short time.
Bruising and bleeding
This treatment 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 that you cannot explain. This includes:
- bleeding gums
- tiny red or purple spots on the skin that may look like a rash.
Some people may need a drip to give them extra platelets. This is called a platelet transfusion.
Anaemia (low number of red blood cells)
This treatment 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 blood cells. This is called a blood transfusion.
Build-up of fluid
This usually causes swelling of the ankles or around the eyes. It can also affect different parts of your body. Sometimes fluid may collect in the lining of the lungs (pleural effusion).
Fluid build-up can be treated with medicines that make you pass more urine (diuretics) or with steroid tablets. Your doctor may stop dasatinib for a few days until the build-up of fluid improves.
Always tell your doctor if you notice fluid build-up anywhere. It is important to contact them immediately if you:
- develop a cough
- have chest pain
- feel more breathless than usual
- or if you gain weight suddenly.
Effects on the lungs
This treatment can cause changes to the lungs. Tell your doctor if you develop:
- a cough
- a fever (high temperature)
You should also tell them if any existing breathing problems get worse. You may have tests to check your lungs.
This treatment may cause diarrhoea. Diarrhoea means passing more stools (poo) than is usual for you, or having watery or loose stools. If you have a stoma, it will be more active than usual.
If you have diarrhoea:
- try to drink at least 2 litres (3½ pints) of fluids each day
- avoid alcohol, caffeine, milk products, high-fat foods and high-fibre foods
- contact the hospital for advice.
Abdominal (tummy) pain
Some people have pain or discomfort in their tummy during treatment with dasatinib. Tell your doctor if this happens to you.
You may feel sick in the first few days after this treatment. Your doctor will give you anti-sickness drugs to help prevent or control sickness. Take the drugs exactly as your nurse or pharmacist tells you. It is easier to prevent sickness than to treat it after it has started.
If you feel sick, take small sips of fluids and eat small amounts often. If you continue to feel sick, or if you vomit more than once in 24-hours, contact the hospital as soon as possible. They will give you advice and may change the anti-sickness drug to one that works better for you.
This treatment may cause headaches. If this happens, tell your doctor or nurse. They can give you painkillers.
Muscle or joint pain
You may get pain in your muscles or joints for a few days after treatment. If this happens, tell your doctor so they can give you painkillers. Tell them if the pain does not get better. Having warm baths and taking regular rests may help.
Feeling tired is a common side effect. It is often worse towards the end of treatment and for some weeks after it has finished. Try to pace yourself and plan your day so you have time to rest. Gentle exercise, like short walks, can give you more energy. If you feel sleepy, do not drive or operate machinery.
Loss of appetite
This treatment can affect your appetite. Do not worry if you do not eat much for a day or two. But if your appetite does not come back after a few days, tell your nurse or dietitian. They will give you advice. They may give you food or drink supplements.
This treatment can affect your skin. Skin changes can include dryness, rashes, itching and acne. You may also notice that you sweat more. Tell your doctor or nurse if you have any skin changes or if they get worse. They can advise you about creams or lotions to use, or prescribe medicines to relieve itching.
If you have a severe rash or any blistering or peeling, contact your doctor immediately.
Your skin may be more sensitive to sun while taking dasatinib. Use a sun cream with a sun protection factor (SPF) of at least 30 when you are in the sun. Cover up with clothing and a hat.
Mood changes and problems sleeping
Effects on the eyes
This treatment may cause hearing changes, including hearing loss. You may have ringing in the ears. This is called tinnitus. You may also become unable to hear some high-pitched sounds. Hearing changes usually get better after this treatment ends. But some can be permanent. Tell your doctor if you notice any changes in your hearing.
Effects on the heart
Chemotherapy can affect the way the heart works. You may have tests to see how well your heart is working. These may be done before, during and sometimes after treatment. If the treatment is causing heart problems, your doctor can change the type of chemotherapy you are having.
Contact a doctor straight away if you:
- have pain or tightness in your chest
- feel breathless or dizzy
- feel your heart is beating too fast or too slowly.
Other conditions can cause these symptoms, but it is important to get them checked by a doctor.
Blood clot risk
Cancer and some cancer treatments can increase the risk of a blood clot. Symptoms of a blood clot include:
- pain, redness or swelling in a leg or arm
- chest pain.
If you have any of these symptoms, contact a doctor straight away.
A blood clot is serious, but can be treated with drugs that thin the blood. Your doctor or nurse can give you more information.
Some medicines can affect how this treatment works or be harmful when you are having it. Always tell your cancer doctor about any drugs you are taking or planning to take, such as:
- medicines you have been prescribed
- medicines you buy in a shop or chemist
- vitamins, herbal drugs and complementary therapies.
Tell other doctors, pharmacists or dentists who prescribe or give you medicines that you are having this cancer treatment.
You can visit the electronic Medicines Compendium (eMC) for more detailed information about your treatment.
Hepatitis B reactivation
If you have had Hepatitis B (a liver infection) in the past, this treatment can make it active again. Your doctor or nurse will talk to you about this and test you for Hepatitis B.
This drug contains lactose. If you have a lactose intolerance, talk to your doctor before you start taking this treatment.
Your doctor will advise you not to get pregnant or make someone pregnant while having this treatment. The drugs may harm a developing baby. It is important to use contraception during your treatment and for a while after treatment finishes. Your doctor, nurse or pharmacist can tell you more about this.
Women are advised not to breastfeed while having this treatment. This is because the drugs could be passed to the baby through breast milk.
Medical and dental treatment
If you need medical treatment for any reason other than cancer, always tell the doctors and nurses that you are having cancer treatment. Give them the contact details for your cancer doctor so they can ask for advice.
If you think you need dental treatment, talk to your cancer doctor or nurse. Always tell your dentist you are having cancer treatment.