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Drug Interactions between erdafitinib and voriconazole

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

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Interactions between your drugs

Major

voriconazole erdafitinib

Applies to: voriconazole and erdafitinib

GENERALLY AVOID: Coadministration of erdafitinib with potent inhibitors of CYP450 2C9 or 3A4 may increase the plasma concentrations and risk of toxicity of erdafitinib, which is a substrate of these isoenzymes. When coadministered with fluconazole, a strong CYP450 2C9 inhibitor and moderate CYP450 3A4 inhibitor, erdafitinib mean ratios for Cmax and AUC were 121% and 148%, respectively, relative to erdafitinib alone. Similarly, when coadministered with itraconazole, a strong CYP450 3A4 inhibitor, erdafitinib mean ratios for Cmax and AUC were 105% and 134%, respectively, relative to erdafitinib alone.

MANAGEMENT: Coadministration of erdafitinib with potent inhibitors of CYP450 2C9 or 3A4 should generally be avoided. If concomitant use is unavoidable, patients should be closely monitored for the development of adverse effects. Dosage adjustments as well as clinical and laboratory monitoring of erdafitinib should be considered whenever a CYP450 2C9 or 3A4 inhibitor is added to or withdrawn from therapy.

References

  1. "Product Information. Balversa (erdafitinib)." Janssen Products, LP (2019):

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Drug and food interactions

Moderate

voriconazole food

Applies to: voriconazole

ADJUST DOSING INTERVAL: Food reduces the oral absorption and bioavailability of voriconazole. According to the product labeling, administration of multiple doses of voriconazole with high-fat meals decreased the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) by 34% and 24%, respectively, when the drug is administered as a tablet, and by 58% and 37%, respectively, when administered as the oral suspension.

MANAGEMENT: To ensure maximal oral absorption, voriconazole tablets and oral suspension should be taken at least one hour before or after a meal.

References

  1. "Product Information. VFEND (voriconazole)." Pfizer U.S. Pharmaceuticals (2002):
  2. Wohlt PD, Zheng L, Gunderson S, Balzar SA, Johnson BD, Fish JT "Recommendations for the use of medications with continuous enteral nutrition." Am J Health Syst Pharm 66 (2009): 1438-67

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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.

See also

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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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