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Drug Interactions between darolutamide and Tykerb

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

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Interactions between your drugs

Moderate

lapatinib darolutamide

Applies to: Tykerb (lapatinib) and darolutamide

GENERALLY AVOID: Coadministration with darolutamide may increase the plasma concentrations of drugs that are substrates of the breast cancer resistance protein (BCRP) transporter. The proposed mechanism is decreased clearance due to inhibition of BCRP-mediated intestinal and hepatobiliary efflux by darolutamide. When rosuvastatin, a known BCRP substrate, was administered concomitantly with darolutamide, mean rosuvastatin peak plasma concentration (Cmax) and systemic exposure (AUC) increased by approximately 5-fold.

MANAGEMENT: Concomitant use of darolutamide with drugs that are BCRP substrates should be avoided when possible. If coadministration is required, patients should be monitored carefully for increased adverse reactions of these drugs and dosing adjusted as necessary.

References

  1. (2019) "Product Information. Nubeqa (darolutamide)." Bayer HealthCare Pharmaceuticals Inc.

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Drug and food interactions

Moderate

lapatinib food

Applies to: Tykerb (lapatinib)

GENERALLY AVOID: Grapefruit juice may increase the plasma concentrations of lapatinib. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruits.

ADJUST DOSING INTERVAL: Food can significantly increase the oral bioavailability of lapatinib. According to the manufacturer, lapatinib peak plasma concentration (Cmax) was approximately 2.5- and 3-fold higher and systemic exposure (AUC) 3- and 4-fold higher when administered with a low fat meal (5% fat; 500 calories) or with a high-fat meal (50% fat; 1000 calories), respectively, compared to fasting. Dividing the daily dose also resulted in an approximately 2-fold higher systemic exposure at steady state compared to the same total dose administered once daily.

MANAGEMENT: Patients treated with lapatinib should preferably avoid the consumption of grapefruit or grapefruit juice. The manufacturer recommends that lapatinib be administered at least one hour before or one hour after a meal. The lapatinib dose is administered once daily and should not be divided.

References

  1. (2007) "Product Information. Tykerb (lapatinib)." Novartis Pharmaceuticals

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Moderate

darolutamide food

Applies to: darolutamide

ADJUST DOSING INTERVAL: Food enhances the oral absorption of darolutamide. According to the prescribing information, bioavailability of darolutamide increased by 2.0 to 2.5-fold when administered with food. A similar increase in exposure was observed for the active metabolite keto-darolutamide.

MANAGEMENT: Darolutamide should be administered with food.

References

  1. (2019) "Product Information. Nubeqa (darolutamide)." Bayer HealthCare Pharmaceuticals Inc.

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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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