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Drug Interactions between Attruby and ritonavir

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

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Interactions between your drugs

Moderate

ritonavir acoramidis

Applies to: ritonavir and Attruby (acoramidis)

GENERALLY AVOID: Coadministration with inducers of uridine diphosphoglucuronate-glucuronosyltransferase (UGT) enzymes and potent inducers of CYP450 3A4 isoenzymes may decrease the plasma concentrations of acoramidis. In vitro, acoramidis is a substrate of multiple UGT enzymes including UGT1A9, UGT1A1, and UGT2B7 and is primarily metabolized by UGT enzyme-mediated glucuronidation. Acoramidis beta-D-glucuronide (Acoramidis-AG) is the predominant metabolite of acoramidis. Acoramidis-AG is approximately 1/3 as pharmacologically active compared with acoramidis, has a low potential for covalent binding, and does not contribute to pharmacological activity. While acoramidis is not metabolized by CYP450 3A4, strong CYP450 3A4 inducers can also induce UGT enzymes.

MANAGEMENT: According to the manufacturer, concomitant use of acoramidis with inducers of UGT enzymes and potent inducers of CYP450 3A4 should generally be avoided due to the potential for reduced efficacy.

References (1)
  1. (2024) "Product Information. Attruby (acoramidis)." BridgeBio Pharma, Inc

Drug and food interactions

Moderate

ritonavir food

Applies to: ritonavir

ADJUST DOSING INTERVAL: Administration with food may modestly affect the bioavailability of ritonavir from the various available formulations. When the oral solution was given under nonfasting conditions, peak ritonavir concentrations decreased 23% and the extent of absorption decreased 7% relative to fasting conditions. Dilution of the oral solution (within one hour of dosing) with 240 mL of chocolate milk or a nutritional supplement (Advera or Ensure) did not significantly affect the extent and rate of ritonavir absorption. When a single 100 mg dose of the tablet was administered with a high-fat meal (907 kcal; 52% fat, 15% protein, 33% carbohydrates), approximately 20% decreases in mean peak concentration (Cmax) and systemic exposure (AUC) were observed relative to administration after fasting. Similar decreases in Cmax and AUC were reported when the tablet was administered with a moderate-fat meal. In contrast, the extent of absorption of ritonavir from the soft gelatin capsule formulation was 13% higher when administered with a meal (615 KCal; 14.5% fat, 9% protein, and 76% carbohydrate) relative to fasting.

MANAGEMENT: Ritonavir should be taken with meals to enhance gastrointestinal tolerability.

References (1)
  1. (2001) "Product Information. Norvir (ritonavir)." Abbott Pharmaceutical

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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