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Drug Interactions between crizotinib and daclatasvir

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

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Interactions between your drugs

Moderate

crizotinib daclatasvir

Applies to: crizotinib and daclatasvir

MONITOR: Coadministration with moderate inhibitors of CYP450 3A4 may increase the plasma concentrations of daclatasvir, which is primarily metabolized by the isoenzyme. When a single 10 mg dose of daclatasvir was administered following pretreatment with the potent CYP450 3A4 inhibitor ketoconazole (400 mg once daily), daclatasvir peak plasma concentration (Cmax) and systemic exposure (AUC) increased by 1.6- and 3-fold, respectively. No data are available for other, less potent CYP450 3A4 inhibitors.

MANAGEMENT: Caution is advised when daclatasvir is used with moderate CYP450 3A4 inhibitors; however, according to the manufacturer, dose adjustments are not required. Patients should be monitored for adverse effects such as headache, fatigue, nausea, diarrhea, and serum lipase elevations.

References (3)
  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. Cerner Multum, Inc. "Australian Product Information."
  3. (2015) "Product Information. Daklinza (daclatasvir)." Bristol-Myers Squibb

Drug and food interactions

Major

crizotinib food

Applies to: crizotinib

GENERALLY AVOID: Grapefruit juice may increase the plasma concentrations of crizotinib. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruits. Because crizotinib is associated with concentration-dependent prolongation of the QT interval, increased levels may potentiate the risk of ventricular arrhythmias such as torsade de pointes and sudden death.

Food has no significant effect on the gastrointestinal absorption of crizotinib. According to the product labeling, a high-fat meal reduced crizotinib peak plasma concentration (Cmax) and systemic exposure (AUC) by approximately 14%.

MANAGEMENT: Patients treated with crizotinib should avoid consumption of grapefruit, grapefruit juice, and any supplement containing grapefruit extract. Crizotinib may be taken without regards to food.

References (1)
  1. (2011) "Product Information. Xalkori (crizotinib)." Pfizer U.S. Pharmaceuticals Group

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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