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Drug Interactions between darunavir and doravirine

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

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Interactions between your drugs

Minor

darunavir doravirine

Applies to: darunavir and doravirine

Coadministration with inhibitors of CYP450 3A4 may increase the plasma concentrations of doravirine, which is primarily metabolized by the isoenzyme. In 10 study subjects, administration of a single 50 mg dose of doravirine with the potent CYP450 3A4 inhibitor ritonavir (100 mg twice daily) increased doravirine peak plasma concentration (Cmax), systemic exposure (AUC) and trough plasma concentration (C24hr) by an average of 31%, 254% and 191%, respectively, compared to administration of doravirine alone. When a single 100 mg dose of doravirine was administered with ketoconazole 400 mg once daily in 10 study subjects, doravirine Cmax, AUC and C24hr increased by an average of 25%, 206% and 175%, respectively. These changes are not considered clinically significant.

References

  1. (2018) "Product Information. Pifeltro (doravirine)." Merck & Co., Inc

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Drug and food interactions

Moderate

darunavir food

Applies to: 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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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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