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Drug Interactions between atazanavir and sacituzumab govitecan

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

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Interactions between your drugs

Major

atazanavir sacituzumab govitecan

Applies to: atazanavir and sacituzumab govitecan

GENERALLY AVOID: Coadministration of sacituzumab govitecan with inhibitors of uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1) may increase the risk of adverse effects, such as nausea, vomiting, diarrhea, and neutropenia. The proposed mechanism involves increased exposure to the pharmacologically active metabolite SN-38, a topoisomerase I inhibitor linked to sacituzumab govitecan, which is metabolized via UGT1A1. Genetic variants of the UGT1A1 gene such as the UGT1A1*28 allele lead to reduced UGT1A1 enzyme activity and patients who are homozygous for the UGT1A1*28 allele are at increased risk for neutropenia from SN-38.

MANAGEMENT: Concomitant use of sacituzumab govitecan with UGT1A1 inhibitors should be avoided. If coadministration is unavoidable, patients should be closely monitored for the development of severe nausea, vomiting, diarrhea, and neutropenia. Patients should be advised to promptly report symptoms such as chills, fever, malaise, sore throat, mouth sores, unusual fatigue, bruising, or bleeding.

References (2)
  1. Cerner Multum, Inc. "Australian Product Information."
  2. (2020) "Product Information. Trodelvy (sacituzumab govitecan)." Immunomedics

Drug and food interactions

Moderate

atazanavir food

Applies to: atazanavir

ADJUST DOSING INTERVAL: Administration of atazanavir with food enhances oral bioavailability and reduces pharmacokinetic variability. According to the manufacturer, administration with a light meal increased the peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of a single 400 mg dose of atazanavir by 57% and 70%, respectively, relative to the fasting state. Administration with a high-fat meal resulted in a mean increase of 35% in atazanavir AUC and no change in Cmax compared to fasting. The coefficient of variation of AUC and Cmax decreased by approximately one-half when given with either a light or high-fat meal compared to the fasting state.

MANAGEMENT: To ensure maximal oral absorption, atazanavir should be administered with or immediately after a meal.

References (1)
  1. (2003) "Product Information. Reyataz (atazanavir)." Bristol-Myers Squibb

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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