Classification: Tyrosine Kinase Inhibitor
Dasatinib is a tyrosine kinase inhibitor. It works by blocking proteins that cause the rapid growth of certain types of leukemia cells. This helps the bone marrow to start making normal blood cells again.
How to Take Dasatinib
Dasatinib comes as a tablet to take by mouth. It is usually taken once a day, with or without food. Take dasatinib at around the same times every day. Do not crush, chew or break dasatinib tablets. This medication contains lactose, which may be important if you have lactose intolerance.
The blood levels of this medication can be affected by certain foods and medications, so they should be avoided. These include: grapefruit, grapefruit juice, verapamil, ketoconazole, rifampin, phenytoin, St. John’s wort, and modafanil. Be sure to tell your healthcare provider about all medications and supplements you take.
Dasatinib is best absorbed by your stomach in the presence of stomach acid. For this reason, you should not take medications that reduce stomach acid, including proton pump inhibitors (omeprazole, Nexium, Protonix, Prevacid), or H2 blockers (tagamet, zantac, pepcid). Antacids, such as Tums and Rolaids, work by neutralizing stomach acid, and can be taken up to 2 hours before or 2 hours after your dasatinib dose.
Storage and Handling
Store your medication in the original, labeled container at room temperature and in a dry location (unless otherwise directed by your healthcare provider or pharmacist). This medication should not be stored in a pillbox. Keep containers out of reach of children and pets.
If a caregiver prepares your dose for you, they should consider wearing gloves or pour the pills directly from their container into the cap, a small cup, or directly into your hand. They should avoid touching the pills. They should always wash their hands before and after giving you the medication. Pregnant or nursing women should not prepare the dose for you. Ask your oncology team where to return any unused medication for disposal. Do not flush down the toilet or throw in the trash.
Where do I get this medication?
Dasatinib is available through select specialty pharmacies. Your oncology team will work with your prescription drug plan to identify an in-network specialty pharmacy for distribution of this medication and shipment directly to your home.
This medication may be covered under your prescription drug plan. Patient assistance may be available to qualifying individuals without prescription drug coverage. Co-pay cards, which reduce the patient co-pay responsibility for eligible commercially (non-government sponsored) insured patients, are also available. Your care team can help you find these resources, if they are available.
Possible Side Effects of Dasatinib
There are a number of things you can do to manage the side effects of dasatinib. Talk to your doctor or nurse about these recommendations. They can help you decide what will work best for you. These are some of the most common side effects:
Low White Blood Cell Count (Leukopenia or Neutropenia)
White blood cells (WBC) are important for fighting infection. While receiving treatment, your WBC count can drop, putting you at a higher risk of getting an infection. You should let your doctor or nurse know right away if you have a fever (temperature greater than 100.4), sore throat or cold, shortness of breath, cough, burning with urination, or a sore that doesn't heal.
Tips to preventing infection:
Low Red Blood Cell Count (Anemia)
Your red blood cells are responsible for carrying oxygen to the tissues in your body. When the red cell count is low, you may feel tired or weak. You should let your doctor or nurse know if you experience any shortness of breath, difficulty breathing or pain in your chest. If the count gets too low, you may receive a blood transfusion.
Low Platelet Count (Thrombocytopenia)
Platelets help your blood clot, so when the count is low you are at a higher risk of bleeding. Let your doctor or nurse know if you have any excess bruising or bleeding, including nose bleeds, bleeding gums or blood in your urine or stool. If the platelet count becomes too low, you may receive a transfusion of platelets.
Nausea and/or Vomiting
Talk to your doctor or nurse so they can prescribe medications to help you manage nausea and vomiting. In addition, dietary changes may help. Avoid things that may worsen the symptoms, such as heavy or greasy/fatty, spicy or acidic foods (lemons, tomatoes, oranges). Try antacids, (e.g. milk of magnesia, calcium tablets such as Tums), saltines, or ginger ale to lessen symptoms.
Call your doctor or nurse if you are unable to keep fluids down for more than 12 hours or if you feel lightheaded or dizzy at any time.
Your oncology team can recommend medications to relieve diarrhea. Also, try eating low-fiber, bland foods, such as white rice and boiled or baked chicken. Avoid raw fruits, vegetables, whole grain breads, cereals and seeds. Soluble fiber is found in some foods and absorbs fluid, which can help relieve diarrhea. Foods high in soluble fiber include: applesauce, bananas (ripe), canned fruit, orange sections, boiled potatoes, white rice, products made with white flour, oatmeal, cream of rice, cream of wheat, and farina. Drink 8-10 glasses on non-alcoholic, un-caffeinated fluid a day to prevent dehydration.
Muscle or Joint Pain/Aches and Headache
Your doctor or nurse can recommend medication and other strategies to relive pain.
Some patients may develop a rash or itchy skin. Use an alcohol free moisturizer on your skin and lips; avoid moisturizers with perfumes or scents. Your doctor or nurse can recommend a topical medication if itching is bothersome. If your skin does crack or bleed, be sure to keep the area clean to avoid infection. Be sure to notify your healthcare provider of any rash that develops, as this can be a reaction. They can give you more tips on caring for your skin.
Some patients may develop a skin reaction/rash that is more severe and may also have fever, sore mouth or throat, blistering or peeling of the skin or in the mouth. Be sure to notify your healthcare provider of any skin reaction that develops, as this can be a very serious reaction.
Fatigue is very common during cancer treatment and is an overwhelming feeling of exhaustion that is not usually relieved by rest. While on cancer treatment, and for a period after, you may need to adjust your schedule to manage fatigue. Plan times to rest during the day and conserve energy for more important activities. Exercise can help combat fatigue; a simple daily walk with a friend can help. Talk to your healthcare team for helpful tips on dealing with this side effect.
Dasatinib can cause bleeding. Notify your healthcare team if you notice any bleeding or bruising, including bleeding that may seem minor, such as bleeding gums and nosebleeds. Contact your care team or go to the emergency room if you experience bright red or dark tar-like stools, vomit blood of vomit that looks like coffee grounds, or develop any signs of stroke, including a severe headache, trouble talking, weakness on one side of the body or confusion.
This medication may cause an abnormal heart rate, called QT prolongation, congestive heart failure, or heart attack. Your healthcare provider will monitor certain electrolyte levels in your blood, as well as your heart function while you are taking this medication. Notify your healthcare provider or go to the emergency room right away if you feel chest pain, abnormal heartbeats, or if you feel dizzy or faint.
Dasatinib can cause your body to hold on to too much fluid (called fluid retention). This may result in generalized swelling, bloating of the abdomen (ascites), fluid building up in the lining of the lungs (pleural effusion), or around your heart. Notify your healthcare team right away if you develop swelling in your arms, legs, feet or abdomen, unexpected weight gain, shortness of breath, difficulty breathing, or if you develop a dry cough.
Pulmonary Arterial Hypertension
This medication can cause high blood pressure in the vessels of your lungs. Contact your healthcare team immediately if you experience shortness of breath, extreme fatigue or swelling all over your body.
Exposure of an unborn child to this medication could cause birth defects, so you should not become pregnant or father a child while on this medication. Effective birth control is necessary during treatment and for at least 30 days after treatment is stopped. Even if your menstrual cycle stops or you believe you are not producing sperm, you could still be fertile and conceive. You should consult with your healthcare team before breastfeeding while receiving this medication.
If you have questions or concerns about the medication that you have been prescribed, please contact your healthcare team. OncoLink is designed for educational purposes only and is not engaged in rendering medical advice or professional services. The information provided through OncoLink should not be used for diagnosing or treating a health problem or a disease. It is not a substitute for professional care. If you have or suspect you may have a health problem, you should consult your health care provider.