Drug interactions
Escitalopram + Phenytoin
Severity: Moderate
Escitalopram 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 is an enzyme inducer and may lower escitalopram concentrations, which could reduce antidepressant effect. Escitalopram may also, in rare cases, alter phenytoin levels, and SSRIs can lower the seizure threshold.
What this interaction means in plain words
Escitalopram 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.
Escitalopram belongs to Central Nervous System; Phenytoin belongs to Central Nervous System.
Why it happens
Phenytoin induces CYP3A4 and CYP2C19, increasing escitalopram clearance.
What to do
Monitor depressive symptoms and consider escitalopram dose titration if response falls. Check phenytoin levels and seizure control when starting or stopping escitalopram.
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 Escitalopram
- Cisapride + Escitalopram Contraindicated
- Citalopram + Escitalopram Contraindicated
- Escitalopram + Isocarboxazid Contraindicated
- Escitalopram + Methylene blue Contraindicated
- Escitalopram + Phenelzine Contraindicated
- Escitalopram + Pimozide Contraindicated
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 Escitalopram with Phenytoin?
MediHelp rates the interaction as moderate. Escitalopram 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 is an enzyme inducer and may lower escitalopram concentrations, which could reduce antidepressant effect. Escitalopram may also, in rare cases, alter phenytoin levels, and SSRIs can lower the seizure threshold.
How serious is the interaction between Escitalopram 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 depressive symptoms and consider escitalopram dose titration if response falls. Check phenytoin levels and seizure control when starting or stopping escitalopram.
What other medicines interact with Escitalopram?
MediHelp also lists interactions of Escitalopram with, for example, Cisapride, Citalopram, Isocarboxazid. The full list is on the Escitalopram page.
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