Drug Interaction Report

Repotrectinib may reduce the blood levels and effects of ruxolitinib. Contact your doctor if your symptoms worsen or your condition changes during treatment with these medications. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Consumption of grapefruit, grapefruit juice, and supplements that contain grapefruit should be avoided during treatment with repotrectinib as they may increase the blood levels of repotrectinib. This may increase the risk and/or severity of side effects such as dizziness, tiredness, muscle pain, nausea, change in your sense of taste, feeling numbness or tingling in your arms or legs, constipation, trouble with balance, shortness of breath, problems with thinking such as forgetfulness or confusion and hallucinations, as well as more serious side effects such severe or life-threatening inflammation of the lungs and liver injury. Talk to your doctor if you have any questions or concerns. Your doctor may be able to provide alternatives that do not interact. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Do not consume grapefruit or grapefruit juice during treatment with ruxolitinib unless directed otherwise by your doctor. Grapefruit juice can increase the blood levels of ruxolitinib. This may increase the risk of side effects that affect your bone marrow function, resulting in low numbers of different types of blood cells. You may be more likely to develop anemia, bleeding problems, or infections. Contact your doctor if you experience potential signs and symptoms of these conditions such as paleness, fatigue, dizziness, fainting, unusual bleeding or bruising, fever, chills, sore throat, body aches, or other flu-like symptoms. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

The recommended maximum number of medicines in the 'multikinase inhibitors' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'multikinase inhibitors' category:

• repotrectinib
• ruxolitinib

Note: In certain circumstances, the benefits of taking this combination of drugs may outweigh any risks. Always consult your healthcare provider before making changes to your medications or dosage.