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Drug Interactions between Andro-Cyp 200 and apalutamide

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

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Interactions between your drugs

Moderate

testosterone apalutamide

Applies to: Andro-Cyp 200 (testosterone) and apalutamide

MONITOR: Coadministration with apalutamide may decrease the plasma concentrations of drugs that are substrates of the metabolic enzymes CYP450 3A4, CYP450 2C19, CYP450 2C9, and uridine diphosphate glucuronosyltransferase (UGT), as well as substrates of the membrane transporters organic anion transporting polypeptide (OATP) 1B1, P-glycoprotein (P-gp), and breast cancer resistance protein (BCRP). According to the prescribing information, coadministration of apalutamide with single oral doses of sensitive CYP450 substrates resulted in a 92% decrease in the systemic exposure (AUC) of midazolam, a CYP450 3A4 substrate; 85% decrease in the AUC of omeprazole, a CYP450 2C19 substrate; and 46% decrease in the AUC of S(-) warfarin, a CYP450 2C9 substrate. These results indicate strong induction of CYP450 3A4 and 2C19 by apalutamide, and weak induction of CYP450 2C9. Coadministration of apalutamide with single oral doses of transporter substrates resulted in a 30% decrease in the AUC of fexofenadine, a P-gp substrate, and 41% decrease in the AUC of rosuvastatin, a BCRP/OATP1B1 substrate. These results suggest that apalutamide is a weak inducer of membrane transporters. Apalutamide may also induce UGT according to the prescribing information; however, no pharmacokinetic data from studies with UGT substrates are available.

MANAGEMENT: Caution is advised when apalutamide is used concomitantly with drugs that are substrates of CYP450 3A4, CYP450 2C19, CYP450 2C9, UGT, OATP1B1, P-gp and/or BCRP, particularly sensitive substrates or those with a narrow therapeutic range. Substitution for these medications is recommended when possible, or monitor for potential loss of therapeutic efficacy if coadministration is required. The prescribing information for concomitant medications should be consulted to assess the benefits versus risks of coadministration of a CYP450 inducer like apalutamide and for any dosage adjustments that may be required.

References

  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. Cerner Multum, Inc. "Australian Product Information."
  3. (2018) "Product Information. Erleada (apalutamide)." Janssen Biotech, Inc.

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Drug and food interactions

No alcohol/food interactions were found. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.

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.