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Drug Interactions between etravirine and Varubi

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

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Interactions between your drugs

Moderate

etravirine rolapitant

Applies to: etravirine and Varubi (rolapitant)

MONITOR: Coadministration with moderate inducers of CYP450 3A4 may decrease the plasma concentrations of rolapitant, which is primarily metabolized by the isoenzyme. When the potent CYP450 3A4 inducer rifampin was administered at 600 mg once daily for 7 days before and 7 days after a single 180 mg dose of rolapitant, mean rolapitant peak plasma concentration (Cmax) and systemic exposure decreased by 30% and 85%, respectively, compared to administration of rolapitant alone. Mean half-life of rolapitant decreased from 176 hours to 41 hours with rifampin. No data are available for other, less potent CYP450 3A4 inducers.

MANAGEMENT: The potential for diminished pharmacologic effects of rolapitant should be considered during coadministration with CYP450 3A4 inducers. Alternative treatments may be required if an interaction is suspected.

References (2)
  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. (2015) "Product Information. Varubi (rolapitant)." Tesaro Inc.

Drug and food interactions

Moderate

etravirine food

Applies to: etravirine

ADJUST DOSING INTERVAL: Coadministration with food increases the oral bioavailability of etravirine. The mechanism is unknown. Compared to administration following a meal, the systemic exposure (AUC) to etravirine was decreased by about 50% when the drug was administered under fasting conditions. The types of meal studied (ranging from 345 kilocalories containing 17 grams fat to 1160 kilocalories containing 70 grams fat) did not appear to make a difference with respect to impact on etravirine bioavailability.

MANAGEMENT: Etravirine should always be administered following a meal.

References (1)
  1. (2008) "Product Information. Intelence (etravirine)." Ortho Biotech Inc

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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