Skip to main content

Drug Interactions between encorafenib and pralsetinib

This report displays the potential drug interactions for the following 2 drugs:

Edit list (add/remove drugs)

Interactions between your drugs

Major

encorafenib pralsetinib

Applies to: encorafenib and pralsetinib

Consumer information for this interaction is not currently available.

GENERALLY AVOID: Coadministration with potent inducers of CYP450 3A may significantly decrease the plasma concentrations of pralsetinib which is primarily metabolised by the isoenzyme. When a single 400 mg dose of pralsetinib was administered with rifampin (a potent CYP450 3A4 inducer), pralsetinib peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by 30% and 68%, respectively. Reduced therapeutic efficacy may occur. In addition, when two or more medications with similar adverse effect profiles are given concurrently, the likelihood of experiencing these adverse reactions may be increased. For example, coadministration with other agents that can prolong the QT interval (e.g., apalutamide, encorafenib, enzalutamide) may result in additive effects and an increased risk of ventricular arrhythmias like torsade de pointes.

MANAGEMENT: Concomitant use of pralsetinib with potent CYP450 3A inducers should generally be avoided. If coadministration with potent CYP450 3A inducers is necessary, the initial dose of pralsetinib should be doubled starting on Day 7 of coadministration with the strong CYP450 3A4 inducer. If the CYP450 3A4 inducer also carries a risk of prolonging the QT interval, then obtaining more frequent electrocardiograms (ECGs) to monitor the QT interval may be advisable. Patients should be counseled to seek immediate medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, syncope, palpitations, irregular heartbeat, and/or shortness of breath. Once the potent CYP450 3A inducer has been discontinued for at least 14 days, the pralsetinib dose taken prior to initiating the potent CYP450 3A4 inducer may be resumed.

References

  1. (2020) "Product Information. Gavreto (pralsetinib)." Blueprint Medicines Corporation

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.

Switch to professional interaction data

Major

pralsetinib food

Applies to: pralsetinib

Pralsetinib should be taken on an empty stomach, at least 2 hours after or 1 hour before a meal. Do not consume grapefruit, grapefruit juice, or any supplements that contain grapefruit extract during treatment with pralsetinib unless directed otherwise by your doctor. Grapefruit juice can increase the blood levels of pralsetinib. This may increase the risk and/or severity of serious side effects such as lung problems, high blood pressure, liver problems, bleeding, fatigue, muscle pains, or constipation. 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.

Switch to professional interaction data

Therapeutic duplication warnings

Therapeutic duplication is the use of more than one medicine from the same drug category or therapeutic class to treat the same condition. This can be intentional in cases where drugs with similar actions are used together for demonstrated therapeutic benefit. It can also be unintentional in cases where a patient has been treated by more than one doctor, or had prescriptions filled at more than one pharmacy, and can have potentially adverse consequences.

Duplication

Multikinase inhibitors

Therapeutic duplication

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:

  • encorafenib
  • pralsetinib

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.

See also

Report options

Loading...
QR code containing a link to this page

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.

Further information

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

Medical Disclaimer