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Drug Interactions between mirabegron and pexidartinib

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

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Interactions between your drugs

Minor

mirabegron pexidartinib

Applies to: mirabegron and pexidartinib

Coadministration with inducers of CYP450 3A4 and/or P-glycoprotein may decrease the plasma concentrations of mirabegron, which has been shown in vitro to be a substrate of the isoenzyme and efflux transporter. However, in vivo results indicate that these pathways may play a limited role in the overall elimination. In healthy study subjects, mirabegron peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by less than 50% when a single 100 mg dose of mirabegron was administered following multiple dosing of rifampin 600 mg once daily. No dosage adjustment is recommended when mirabegron is administered in combination with rifampin and probably other CYP450 3A4/P-gp inducers.

References (1)
  1. (2012) "Product Information. Myrbetriq (mirabegron)." Astellas Pharma US, Inc

Drug and food interactions

Major

pexidartinib food

Applies to: pexidartinib

ADJUST DOSING INTERVAL: The presence of food may increase the absorption and toxicity of pexidartinib. Administration of pexidartinib with a high-fat meal increased peak plasma concentration (Cmax) and systemic exposure (AUC) by 100% and prolonged the time to reach peak plasma concentration (Tmax) by 2.5 hours.

GENERALLY AVOID: Grapefruit or grapefruit juice may increase the plasma concentration and risk of adverse effects of pexidartinib, including potentially fatal hepatotoxicity. The mechanism is inhibition of CYP450 3A4-mediated metabolism of pexidartinib by certain compounds present in grapefruits. Concomitant administration of itraconazole, a strong CYP450 3A4 inhibitor, increased pexidartinib peak plasma concentration (Cmax) and systemic exposure (AUC) by 48% and 70%, respectively.

MANAGEMENT: Pexidartinib should be administered on an empty stomach, at least one hour before or two hours after a meal or snack. Consumption of grapefruit or grapefruit juice should generally be avoided during pexidartinib therapy. If concomitant use is unavoidable, the dose of pexidartinib should be reduced according to the manufacturer's recommendations. If concomitant use of grapefruit or grapefruit juice is discontinued, the dose of pexidartinib may be increased (after 3 plasma half-lives of a strong CYP450 3A4 inhibitor) to the dose that was used prior to consumption of grapefruit or grapefruit juice.

References (1)
  1. (2019) "Product Information. Turalio (pexidartinib)." Daiichi Sankyo, Inc.
Minor

mirabegron food

Applies to: mirabegron

Food reduces the oral absorption and bioavailability of mirabegron. According to the product labeling, administration of a 50 mg tablet with a high-fat meal decreased mirabegron peak plasma concentration (Cmax) and systemic exposure (AUC) by 45% and 17%, respectively, whereas administration with a low-fat meal decreased mirabegron Cmax and AUC by 75% and 51%, respectively. In phase 3 clinical studies demonstrating both safety and efficacy, mirabegron was administered without regards to food content and intake. Therefore, mirabegron can be taken with or without food at the recommended dosage.

References (1)
  1. (2012) "Product Information. Myrbetriq (mirabegron)." Astellas Pharma US, 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.

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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

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