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Drug Interactions between Nityr and tovorafenib

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

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Interactions between your drugs

Moderate

nitisinone tovorafenib

Applies to: Nityr (nitisinone) and tovorafenib

Consumer information for this interaction is not currently available.

MONITOR: Coadministration with inducers of CYP450 3A4 may decrease the plasma concentrations and therapeutic effects of nitisinone. The proposed mechanism is induction of CYP450 3A4-mediated metabolism of nitisinone, which has been shown in vitro to be metabolized by this isoenzyme. However, data evaluating the interaction are not available.

MANAGEMENT: Until more information is available, caution is advised if nitisinone is used concomitantly with CYP450 3A4 inducers. Dosage adjustments as well as clinical and laboratory monitoring of nitisinone should be considered whenever a CYP450 3A4 inducer is added to or withdrawn from therapy.

References

  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. Canadian Pharmacists Association (2006) e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink
  3. Cerner Multum, Inc. "Australian Product Information."

Drug and food interactions

Moderate

nitisinone food

Applies to: Nityr (nitisinone)

Grapefruit juice may increase the blood levels of certain medications such as nitisinone. You may want to limit your consumption of grapefruit and grapefruit juice during treatment with nitisinone. However, if you have been regularly consuming grapefruit or grapefruit juice with the medication, then it is advisable for you to talk with your doctor before changing the amounts of these products in your diet, as this may alter the effects of your medication. Contact your doctor if your condition changes or you experience increased side effects. Orange juice is not expected to interact.

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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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