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Drug Interactions between rifapentine and sotorasib

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

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Interactions between your drugs

Major

rifapentine sotorasib

Applies to: rifapentine and sotorasib

GENERALLY AVOID: Coadministration with potent inducers of CYP450 3A4 may significantly decrease the plasma concentrations of sotorasib, which is partially metabolized by the isoenzyme. According to the prescribing information, the main metabolic pathways of sotorasib are non-enzymatic conjugation and oxidative metabolism via CYP450 3A isoenzymes. When a single dose of sotorasib was coadministered with multiple doses of rifampin, a potent CYP450 3A4 inducer, sotorasib peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by 35% and 51%, respectively. Reduced therapeutic efficacy of sotorasib may occur. No clinically significant effect on sotorasib exposure was observed following coadministration with a single dose of rifampin.

MANAGEMENT: Concomitant use of sotorasib with potent CYP450 3A4 inducers should generally be avoided.

References

  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. (2021) "Product Information. Lumakras (sotorasib)." Amgen USA

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Drug and food interactions

Moderate

rifapentine food

Applies to: rifapentine

ADJUST DOSING INTERVAL: Administration with food may increase the oral bioavailability of rifapentine and reduce the incidence of gastrointestinal adverse events. Administration with a high fat meal typically increases rifapentine's maximum concentration (Cmax) and systemic exposure (AUC) by approximately 40% to 50% over that observed when rifapentine is administered under fasting conditions. Rifapentine is often prescribed in combination with isoniazid. When single doses of rifapentine (900 mg) and isoniazid (900 mg) were administered with a low fat, high carbohydrate breakfast, the Cmax and AUC of rifapentine increased by 47% and 51%, respectively. On the other hand, isoniazid's Cmax and AUC decreased by 46% and 23%, respectively.

MANAGEMENT: Products containing oral rifapentine as the sole ingredient recommend administration with a meal to increase bioavailability and reduce the occurrence of gastrointestinal upset, nausea, and/or vomiting. Consultation of product labeling for combination products and/or relevant guidelines may be helpful if rifapentine is combined with a medication that is typically taken on an empty stomach.

References

  1. (2021) "Product Information. Isoniazid/Rifapentine 300 mg/300 mg (Macleods) (isoniazid-rifapentine)." Imported (India), 2
  2. (2021) "Product Information. Priftin (rifapentine)." sanofi-aventis

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Minor

sotorasib food

Applies to: sotorasib

Food does not appear to have a clinically significant effect on the oral bioavailability of sotorasib. When a 960 mg dose of sotorasib was administered to study patients with a high-fat, high-calorie meal (approximately 800 to 1000 calories; 150, 250, and 500 to 600 calories from protein, carbohydrate, and fat, respectively), sotorasib peak plasma concentration (Cmax) did not change while systemic exposure (AUC 0-24 hours) increased by 25% compared to administration under fasted conditions. Sotorasib can be administered with or without food at approximately the same time each day.

References

  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. (2021) "Product Information. Lumakras (sotorasib)." Amgen USA

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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.

See also

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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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