This Medication Guide has been approved by the U.S. Food and Drug Administration.		Revised: 05/2025
MEDICATION GUIDE CAPRELSA® (kap-rel-sah) (vandetanib) tablets
Read this Medication Guide before you start taking CAPRELSA and each time you get a refill. There may be new information. This Medication Guide does not take the place of talking to your healthcare provider about your medical condition or treatment.
What is the most important information I should know about CAPRELSA? CAPRELSA can cause a change in the electrical activity of your heart called QT prolongation, which can cause irregular heartbeats and that may lead to death. You should not take CAPRELSA if you have had a condition called long QT syndrome since birth. Your healthcare provider should perform tests to check the levels of your blood potassium, calcium, magnesium, and thyroid-stimulating hormone (TSH), as well as the electrical activity of your heart with a test called an electrocardiogram (ECG). You should have these tests: Before starting CAPRELSA Regularly during CAPRELSA treatment: 2 to 4 weeks after starting CAPRELSA 8 to 12 weeks after starting CAPRELSA every 3 months thereafter if your healthcare provider changes your dose of CAPRELSA if you start taking medicine that causes QT prolongation as instructed by your healthcare provider Your healthcare provider may stop your CAPRELSA treatment for a while and restart you at a lower dose if you have QT prolongation. Call your healthcare provider right away if you feel faint, light-headed, or feel your heart beating irregularly during treatment with CAPRELSA. These may be symptoms related to QT prolongation. CAPRELSA is only available through a restricted program called the CAPRELSA Risk Evaluation and Mitigation Strategy (REMS) Program. For more information about the CAPRELSA REMS Program, call 1-800-817-2722 or go to www.caprelsa.com. See "What are the possible side effects of CAPRELSA?" for more information about side effects.
What is CAPRELSA? CAPRELSA is a prescription medicine used to treat medullary thyroid cancer that cannot be removed by surgery or that has spread to other parts of the body. It takes a long time to get rid of CAPRELSA from your body and you may be at risk for side effects related to CAPRELSA after you have stopped your treatment. It is not known if CAPRELSA is safe and effective in children.
Who should not take CAPRELSA? Do not take CAPRELSA if you have QT prolongation.
Before you take CAPRELSA, tell your healthcare provider about all of your medical conditions, including if you: have any heart problems, including a condition called congenital long QT syndrome have an irregular heartbeat take or have stopped taking a medicine that causes QT prolongation have low blood levels of potassium, calcium, or magnesium have high blood levels of thyroid-stimulating hormone have high blood pressure have skin problems have a history of breathing problems have a recent history of coughing up blood or bleeding have diarrhea have liver problems have kidney problems have seizures or are being treated for seizures have weak or soft bone problems (osteonecrosis), including osteonecrosis of the jaw plan to have any surgery, a dental procedure or have had a recent surgery. You should stop taking CAPRELSA at least 1 month before a planned surgery or dental procedure. See "What are the possible side effects of CAPRELSA?" are pregnant or plan to become pregnant. CAPRELSA can cause harm to your unborn baby. Tell your healthcare provider if you become pregnant or think you might be pregnant during treatment with CAPRELSA. Females who are able to become pregnant: Your healthcare provider must do a pregnancy test before you begin treatment with CAPRELSA. You must use effective birth control (contraception) during your treatment with CAPRELSA and for 4 months after your last dose of CAPRELSA. Talk to your healthcare provider about birth control methods that may be used during treatment with CAPRELSA. Males with female partners who are able to become pregnant: You must use effective birth control during treatment with CAPRELSA and for 4 months after your last dose of CAPRELSA. are breastfeeding or plan to breastfeed. It is not known if CAPRELSA passes into your breast milk. Do not breastfeed during treatment and for 4 months after your last dose of CAPRELSA. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. CAPRELSA and other medicines may affect each other causing side effects. Especially tell your healthcare provider if you take: St. John's wort. You should not take St. John's wort during treatment with CAPRELSA a medicine for your heart bisphosphonate medicines or denosumab Ask your healthcare provider if you are not sure if your medicine is one listed above. Do not take other medicines during treatment with CAPRELSA until you have talked with your healthcare provider or pharmacist. Know the medicines you take. Keep a list of them to show your healthcare provider and pharmacist when you get a new medicine.
How should I take CAPRELSA? Take CAPRELSA exactly as your healthcare provider tells you to take it. Do not change your dose or stop taking CAPRELSA unless your healthcare provider tells you to. CAPRELSA may be taken with or without food. Swallow CAPRELSA tablets whole with water. Do not crush CAPRELSA tablets. If CAPRELSA tablets are accidentally crushed, contact with skin should be avoided. If contact occurs, wash affected areas well with water. If you cannot swallow CAPRELSA tablets whole: place your dose of CAPRELSA in a glass that contains 2 ounces of noncarbonated water (no other liquids should be used). stir the CAPRELSA tablet(s) and water mixture for about 10 minutes or until the tablet(s) are in very small pieces (the tablets will not completely dissolve). swallow CAPRELSA and water mixture right away. if any CAPRELSA and water mixture remains in the glass, mix with an additional 4 ounces of noncarbonated water and swallow the mixture to make sure that you take your full dose of CAPRELSA. If you miss a dose and your next dose is in: less than 12 hours, take your next dose at the normal time. Do not make up for the missed dose. 12 hours or more, take the missed dose as soon as you remember. Take the next dose at the normal time. Call your healthcare provider right away if you take too much CAPRELSA. Your healthcare provider should check your blood pressure regularly during your treatment with CAPRELSA.
What should I avoid while taking CAPRELSA? Limit exposure to the sun. CAPRELSA can make your skin sensitive to the sun. During treatment with CAPRELSA and for at least 4 months after stopping treatment with CAPRELSA, use sun block and wear clothes that cover your skin, including your head, arms, and legs when you go outdoors. Use caution before driving or using machinery. Keep in mind CAPRELSA may make you feel tired, or cause blurred vision.
What are the possible side effects of CAPRELSA? CAPRELSA may cause serious side effects, including: See "What is the most important information I should know about CAPRELSA?" Severe skin reactions. CAPRELSA can cause severe skin reactions that can lead to death, such as toxic epidermal necrolysis and Stevens-Johnson syndrome, or other serious skin reactions that may affect any part of your body. These severe skin reactions may be life threatening and you may need to be treated in a hospital. Tell your healthcare provider right away if you get any of these symptoms:
	skin rash or acne dry skin itching blisters on your skin redness or swelling of your face, hands, or soles of your feet	blisters or sores in your mouth peeling of your skin fever muscle or joint aches
Breathing problems (interstitial lung disease). CAPRELSA may cause a breathing problem called interstitial lung disease that can lead to death. Tell your healthcare provider right away if you experience sudden or worsening shortness of breath, cough that does not go away (persistent) or fever. Stroke. Strokes have been reported in some people who have taken CAPRELSA and in some cases have caused death. Stop taking CAPRELSA and call your healthcare provider right away if you have symptoms of a stroke which may include: numbness or weakness of the face, arm or leg, especially on one side of the body sudden confusion, trouble speaking or understanding sudden trouble seeing in one or both eyes sudden trouble walking, dizziness, loss of balance or coordination sudden, severe headache Bleeding. CAPRELSA can cause serious bleeding that can lead to death. Tell your healthcare provider right away if you have severe bleeding during treatment with CAPRELSA. Heart failure. CAPRELSA can cause heart failure that can lead to death. You may have to stop taking CAPRELSA if you have heart failure. Heart failure may not be reversible after stopping CAPRELSA. Your healthcare provider should monitor you for signs and symptoms of heart failure. Diarrhea. Diarrhea is common with CAPRELSA and can be severe. Your healthcare provider should check your blood levels to monitor your electrolytes more frequently if you have diarrhea. Tell your healthcare provider if you develop diarrhea during treatment with CAPRELSA. Thyroid hormones. You can have changes in your thyroid hormone during treatment with CAPRELSA. Your healthcare provider should monitor your thyroid hormone levels during treatment with CAPRELSA. High blood pressure (hypertension). If you develop high blood pressure or your high blood pressure gets worse, your healthcare provider may lower your dose of CAPRELSA or tell you to stop taking CAPRELSA until your blood pressure is under control. Your healthcare provider may prescribe another medicine to control your high blood pressure. Reversible Posterior Leukoencephalopathy Syndrome (RPLS). A condition called reversible posterior leukoencephalopathy syndrome can happen while taking CAPRELSA. Call your healthcare provider right away if you get any of these symptoms:
	seizures headaches	changes in vision confusion problems thinking
Kidney problems. CAPRELSA may cause problems with your kidneys, including kidney failure. Wound healing problems. Wounds may not heal properly during CAPRELSA treatment. Tell your healthcare provider if you plan to have any surgery before starting or during treatment with CAPRELSA. You should stop taking CAPRELSA at least 1 month before planned surgery. Your healthcare provider should tell you when you may start taking CAPRELSA again after surgery. Bone problems (osteonecrosis). CAPRELSA may cause death of bone tissue in your jawbone. Your healthcare provider should examine your mouth before you start and during treatment with CAPRELSA. Tell your dentist that you are taking CAPRELSA. It is important for you to practice good mouth care during treatment with CAPRELSA. Tell your healthcare provider right away if you develop any symptoms of jaw problems including jaw pain, toothache, loose teeth or sores on your gums.
The most common side effects of CAPRELSA include:
rash acne high blood pressure nausea		headache upper respiratory tract infections decreased appetite stomach-area (abdominal) pain
Tell your healthcare provider if you have any side effect that bothers you or that does not go away. These are not all of the possible side effects of CAPRELSA. For more information, ask your healthcare provider or pharmacist. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
How should I store CAPRELSA? Store CAPRELSA tablets at room temperature between 68°F and 77°F (20°C and 25°C). Safely throw away medicine that is out of date or that you no longer need. Ask your pharmacist how to safely throw away CAPRELSA tablets. Keep CAPRELSA and all medicines out of the reach of children.
General information about the safe and effective use of CAPRELSA. Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use CAPRELSA for a condition for which it was not prescribed. Do not give CAPRELSA to other people, even if they have the same symptoms you have. It may harm them. You can ask your healthcare provider or pharmacist for information about CAPRELSA that is written for health professionals.
What are the ingredients in CAPRELSA? Active ingredient: vandetanib Inactive ingredients: Tablet core: calcium hydrogen phosphate dihydrate, crospovidone, magnesium stearate, microcrystalline cellulose, and povidone Tablet film-coat: hypromellose 2910, macrogol 300, and titanium dioxide E171 Manufactured for: Genzyme Corporation, Cambridge, MA 02141 A SANOFI COMPANY CAPRELSA is a registered trademark of Genzyme Corporation. ©2025 Genzyme Corporation. For more information, go to www.caprelsa.com or call 1-800-817-2722.

vandetanib

Product monograph

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