Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Rozlytrek (Entrectinib).
Birth control: Rozlytrek (Entrectinib) may cause harm to the developing baby if it is taken by either parent while the mother is pregnant. Women who may become pregnant should use effective birth control while taking Rozlytrek (Entrectinib) and for 5 weeks after taking the last dose. Men taking Rozlytrek (Entrectinib), whose partners may become pregnant, should use effective birth control during treatment and for 3 months after the last dose.
Bone health: Rozlytrek (Entrectinib) has been associated with an increased risk in fractures, which may occur within several months of starting to take Rozlytrek (Entrectinib). While some fractures are reported after falls or other injuries, some fractures have been reported with no memorable cause. Most fractures occur in the legs or hips. Report any unusual pain to your doctor immediately.
Driving/operating machinery: Rozlytrek (Entrectinib) may cause dizziness, blurred vision, or decreased mental alertness, affecting your ability to drive or operate machinery. Avoid driving, operating machinery, or performing other potentially hazardous tasks until you have determined how Rozlytrek (Entrectinib) affects you.
Heart failure: Rozlytrek (Entrectinib) may cause or worsen symptoms of Congestive Heart Failure. If you have heart disease such as Angina, congestive heart failure, or arrhythmia, discuss with your doctor how Rozlytrek (Entrectinib) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Rozlytrek (Entrectinib), and whether any special monitoring is needed. Contact your doctor as soon as possible if you develop symptoms of heart failure, such as shortness of breath, rapid heartbeat, or swollen legs, feet, or hands.
Heart rhythm: Rozlytrek (Entrectinib) can cause changes to the normal rhythm of the heart, including an irregular heartbeat called QT prolongation. QT prolongation is a serious life-threatening condition that can cause fainting, seizures, and sudden death. If you are at risk for heart rhythm problems (e.g., people with heart failure, angina, low potassium or magnesium levels), discuss with your doctor how Rozlytrek (Entrectinib) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Rozlytrek (Entrectinib), and whether any special monitoring is needed.
Your doctor will monitor your heart rhythm regularly while you are taking Rozlytrek (Entrectinib) with a test called an electrocardiogram (ECG). You should not take Rozlytrek (Entrectinib) if your ECG already shows that you have QT prolongation or if you are taking a medication that can cause QT prolongation.
Liver function: Liver disease or reduced liver function may cause Rozlytrek (Entrectinib) to build up in the body, causing side effects. If you have liver problems, discuss with your doctor how Rozlytrek (Entrectinib) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Rozlytrek (Entrectinib), and whether any special monitoring is needed. Your doctor may want to test your liver function regularly with blood tests while you are taking Rozlytrek (Entrectinib).
If you experience symptoms of liver problems such as fatigue, feeling unwell, loss of appetite, nausea, yellowing of the skin or whites of the eyes, dark urine, pale stools, abdominal pain or swelling, and itchy skin, contact your doctor immediately.
Tumour lysis syndrome: Rozlytrek (Entrectinib), like many other cancer medications, causes many cancer cells to be suddenly killed when treatment is first started. This can overwhelm the body with waste products from the cells. As a result, the body may not be able to keep up with getting rid of all the waste. When this happens, you may experience nausea and shortness of breath, and notice cloudy urine or joint pain. This is called tumour lysis syndrome. Your doctor may prescribe some medications to help your body get rid of the waste products. Make sure you understand how to use these medications and report any of these signs or symptoms to your doctor immediately.
Pregnancy: Rozlytrek (Entrectinib) should not be used during pregnancy, as it may cause harm to the developing baby. If you become pregnant while taking Rozlytrek (Entrectinib), contact your doctor immediately.
Breast-feeding: It is not known if Rozlytrek (Entrectinib) passes into breast milk. If you are a breast-feeding mother and are taking Rozlytrek (Entrectinib), it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.
Children: The safety and effectiveness of using Rozlytrek (Entrectinib) have not been established for children.
