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Drug Interactions between ritlecitinib and Scemblix

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

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Interactions between your drugs

Major

asciminib ritlecitinib

Applies to: Scemblix (asciminib) and ritlecitinib

GENERALLY AVOID: Coadministration of ritlecitinib with other immunosuppressive agents may potentiate the risk of infections as well as malignancies, including non-melanoma skin cancer (NMSC). Serious infections have been reported in patients who have received ritlecitinib. The most common serious infections reported with ritlecitinib included appendicitis, pneumonia, COVID-19, and sepsis. Herpes virus reactivation (e.g., herpes zoster) was also reported during clinical studies with ritlecitinib, as well as malignancies including NMSC.

MANAGEMENT: The safety and efficacy of ritlecitinib in combination with immunosuppressive agents has not been evaluated. It is recommended that the concomitant use of ritlecitinib with other Janus Kinase (JAK) inhibitors, biologic immunomodulators, cyclosporine, or other potent immunosuppressants be avoided. Some authorities recommend avoiding ritlecitinib with all systemic immunosuppressive agents. Patients receiving ritlecitinib should be closely monitored for the development of signs and symptoms of infection during and after treatment, including the possible development of tuberculosis in patients who tested negative for latent tuberculosis infection prior to initiating therapy. If a serious infection develops, ritlecitinib therapy should be interrupted until the infection is controlled.

References (1)
  1. (2023) "Product Information. Litfulo (ritlecitinib)." Pfizer U.S. Pharmaceuticals Group

Drug and food interactions

Moderate

asciminib food

Applies to: Scemblix (asciminib)

ADJUST DOSING INTERVAL: Food may reduce the oral bioavailability of asciminib. When a single 40 mg dose of asciminib was administered with a low-fat meal (400 calories; 25% fat) in healthy volunteers, asciminib peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by 35% and 30%, respectively, compared to asciminib administered in the fasted state. Administration with a high-fat meal (1000 calories; 50% fat) decreased the Cmax and AUC of asciminib by 68% and 62%, respectively.

MANAGEMENT: To ensure adequate asciminib exposures, food consumption should be avoided for at least 2 hours before and 1 hour after taking asciminib.

References (2)
  1. (2021) "Product Information. Scemblix (asciminib)." Novartis Pharmaceuticals
  2. (2022) "Product Information. Scemblix (asciminib)." Novartis Pharmaceuticals UK Ltd, Scemblix 20 mg film-

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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