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Drug Interactions between ixabepilone and Prezista

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

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Interactions between your drugs

Moderate

darunavir ixabepilone

Applies to: Prezista (darunavir) and ixabepilone

MONITOR: Coadministration with inhibitors of CYP450 3A4 may increase the plasma concentrations of ixabepilone, which is primarily metabolized by the isoenzyme. According to the product labeling, administration of ixabepilone in combination with the potent inhibitor ketoconazole resulted in a 79% increase in ixabepilone systemic exposure (AUC) compared to treatment without ketoconazole. The effect of mild or moderate inhibitors such as erythromycin, fluconazole, or verapamil on exposure to ixabepilone has not been studied.

MANAGEMENT: Caution is advised when ixabepilone is prescribed with CYP450 3A4 inhibitors. Pharmacologic response to ixabepilone should be monitored more closely whenever a CYP450 3A4 inhibitor is added to or withdrawn from therapy, and the ixabepilone dosage adjusted as necessary. Frequent monitoring of peripheral blood counts between treatment cycles is recommended, and patients should be advised to contact their physician if they experience signs and symptoms of ixabepilone toxicities such as infection or burning, tingling, or numbness in the hands and feet.

References

  1. (2007) "Product Information. Ixempra (ixabepilone)." Bristol-Myers Squibb

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Drug and food interactions

Moderate

darunavir food

Applies to: Prezista (darunavir)

ADJUST DOSING INTERVAL: Food enhances the absorption and oral bioavailability of darunavir administered in combination with low-dose ritonavir. The mechanism is unknown. When administered with food, the peak plasma concentration (Cmax) and area under the plasma concentration-time curve (AUC) of darunavir were approximately 30% higher than when administered in the fasting state. Darunavir exposure was similar for the range of meals studied. The total caloric content of the various meals evaluated ranged from 240 Kcal (12 grams fat) to 928 Kcal (56 grams fat).

MANAGEMENT: To ensure maximal oral absorption, darunavir coadministered with ritonavir should be taken with food. The type of food is not important.

References

  1. (2006) "Product Information. Prezista (darunavir)." Ortho Biotech Inc

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Moderate

ixabepilone food

Applies to: ixabepilone

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

MANAGEMENT: Patients treated with ixabepilone should avoid the consumption of grapefruit or grapefruit juice.

References

  1. (2007) "Product Information. Ixempra (ixabepilone)." Bristol-Myers Squibb

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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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