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Drug Interactions between brigatinib and nelfinavir

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

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Interactions between your drugs

Major

nelfinavir brigatinib

Applies to: nelfinavir and brigatinib

GENERALLY AVOID: Coadministration with potent inhibitors of CYP450 3A4 may significantly increase the plasma concentrations of brigatinib, which is partially metabolized by the isoenzyme. When a single 90 mg dose of brigatinib was administered with the potent CYP450 3A4 inhibitor itraconazole (200 mg twice daily), brigatinib peak plasma concentration (Cmax) and systemic exposure (AUC) increased by 21% and 101%, respectively, compared to brigatinib administered alone.

MANAGEMENT: Concomitant use of brigatinib with potent CYP450 3A4 inhibitors should generally be avoided. If coadministration is required, the brigatinib once daily dose should be reduced by approximately 50% (i.e., from 180 mg to 90 mg, or from 90 mg to 60 mg). Patients should be closely monitored for increased adverse reactions such as nausea, vomiting, diarrhea, hypertension, bradycardia, hyperglycemia, visual disturbances, lymphopenia, anemia, and elevations in pancreatic enzymes and creatine phosphokinase. Following discontinuation of the CYP450 3A4 inhibitor, the brigatinib dose that was tolerated previously may be resumed.

References

  1. "Product Information. Alunbrig (brigatinib)." Ariad Pharmaceuticals Inc (2017):

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Drug and food interactions

Moderate

brigatinib food

Applies to: brigatinib

GENERALLY AVOID: Grapefruit juice may increase the plasma concentrations of brigatinib. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruit. In general, the effect of grapefruit juice is concentration-, dose- and preparation-dependent, and can vary widely among brands. Certain preparations of grapefruit juice (e.g., high dose, double strength) have sometimes demonstrated potent inhibition of CYP450 3A4, while other preparations (e.g., low dose, single strength) have typically demonstrated moderate inhibition. Itraconazole, a potent CYP450 3A4 inhibitor, has been shown to double brigatinib systemic exposure (AUC) in healthy volunteers. Increased exposure to brigatinib may increase the risk of adverse effects such as nausea, vomiting, diarrhea, hypertension, bradycardia, hyperglycemia, visual disturbances, lymphopenia, anemia, and elevations in pancreatic enzymes and creatine phosphokinase.

Food does not significantly affect the oral bioavailability of brigatinib. When brigatinib was administered to healthy volunteers after a high-fat meal (920 calories; 59 g fat, 58 g carbohydrates, 40 g proteins), brigatinib peak plasma concentration (Cmax) decreased by 13% and systemic exposure (AUC) did not change compared to administration after overnight fasting.

MANAGEMENT: Brigatinib may be taken with or without food. Patients should avoid consumption of grapefruit and grapefruit juice during treatment with brigatinib.

References

  1. "Product Information. Alunbrig (brigatinib)." Ariad Pharmaceuticals Inc (2017):

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Therapeutic duplication warnings

No 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.

Further information

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

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