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Drug Interaction Report

3 potential interactions and/or warnings found for the following 2 drugs:

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Interactions between your drugs

Major

palbociclib encorafenib

Applies to: Ibrance (palbociclib), encorafenib

Consumer information for this interaction is not currently available.

GENERALLY AVOID: Coadministration with potent inducers of CYP450 3A4 may significantly decrease the plasma concentrations of palbociclib, which is a substrate of the isoenzyme. In 15 healthy study subjects, administration of a single 125 mg dose of palbociclib with multiple 600 mg daily doses of rifampin, a potent CYP450 3A4 inducer, resulted in 70% and 85% decreases in palbociclib peak plasma concentration (Cmax) and systemic exposure (AUC), respectively, compared to palbociclib administered alone. Therapeutic failure may occur.

MANAGEMENT: Concomitant use of palbociclib with potent CYP450 3A4 inducers should generally be avoided. Alternative agents with no or minimal CYP450 3A4 induction potential are recommended whenever possible.

Drug and food interactions

Major

encorafenib food

Applies to: encorafenib

You should preferably avoid consumption of grapefruit and grapefruit juice while taking encorafenib. Grapefruit and grapefruit juice can significantly increase the blood levels of encorafenib. This may increase the risk of serious side effects such as bleeding complications, eye and vision problems, liver problems, irregular heart rhythm, and development of new skin cancers. Talk to your doctor if you have any questions or concerns. 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.

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Moderate

palbociclib food

Applies to: Ibrance (palbociclib)

Palbociclib oral capsules (Ibrance) should be taken with food to help with its absorption. Palbociclib oral tablets (Ibrance) may be taken with or without food. Do not consume grapefruit or grapefruit juice during treatment with palbociclib. Grapefruit and grapefruit juice can interact with palbociclib and increase the levels of palbociclib in your body. You may be more likely to experience side effects such as nausea; vomiting; diarrhea; loss of appetite; mouth sores; hair loss; weakness; pain, numbness, or tingling in the hands and feet; and impaired bone marrow function resulting in low numbers of different types of blood cells, which can increase the risk of anemia, bleeding problems, and infections. 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.

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Therapeutic duplication warnings

No duplication warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.


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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.