Drug interactions
Doxorubicin liposomal + Phenytoin
Severity: Moderate
Doxorubicin liposomal and Phenytoin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Phenytoin may lower doxorubicin exposure through enzyme induction, though liposomal formulation alters its disposition. Chemotherapy has also been associated with changes in phenytoin levels, risking seizure control.
What this interaction means in plain words
Doxorubicin liposomal and Phenytoin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Phenytoin may induce CYP3A4 metabolism of doxorubicin; chemotherapy may alter phenytoin absorption or clearance by unestablished mechanisms.
What to do
Monitor phenytoin concentrations and seizure control during treatment and observe for reduced antitumor response.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Phenytoin
- Artemether / lumefantrine + Phenytoin Contraindicated
- Bictegravir + Phenytoin Contraindicated
- Cabotegravir + Phenytoin Contraindicated
- Doravirine + Phenytoin Contraindicated
- Elbasvir / grazoprevir + Phenytoin Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Phenytoin Contraindicated
Frequently asked questions
Can I take Doxorubicin liposomal with Phenytoin?
MediHelp rates the interaction as moderate. Doxorubicin liposomal and Phenytoin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Phenytoin may lower doxorubicin exposure through enzyme induction, though liposomal formulation alters its disposition. Chemotherapy has also been associated with changes in phenytoin levels, risking seizure control.
How serious is the interaction between Doxorubicin liposomal and Phenytoin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor phenytoin concentrations and seizure control during treatment and observe for reduced antitumor response.
What other medicines interact with Phenytoin?
MediHelp also lists interactions of Phenytoin with, for example, Artemether / lumefantrine, Bictegravir, Cabotegravir. The full list is on the Phenytoin page.
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