Drug interactions
Desvenlafaxine + Encainide
Severity: Moderate
Desvenlafaxine and Encainide: 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
Encainide is a CYP2D6 substrate whose active metabolites contribute to effect and proarrhythmic risk. Desvenlafaxine weakly inhibits CYP2D6, which may shift exposure to parent drug and alter antiarrhythmic effect.
What this interaction means in plain words
Desvenlafaxine and Encainide 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
Weak CYP2D6 inhibition by desvenlafaxine alters encainide metabolism to its active metabolites.
What to do
Monitor ECG and clinical response for proarrhythmia or loss of effect when starting or stopping desvenlafaxine. Adjust encainide dose accordingly.
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 Desvenlafaxine
- Desvenlafaxine + Isocarboxazid Contraindicated
- Desvenlafaxine + Methylene blue Contraindicated
- Desvenlafaxine + Phenelzine Contraindicated
- Desvenlafaxine + Rasagiline Contraindicated
- Desvenlafaxine + Safinamide Contraindicated
- Desvenlafaxine + Selegiline Contraindicated
Frequently asked questions
Can I take Desvenlafaxine with Encainide?
MediHelp rates the interaction as moderate. Desvenlafaxine and Encainide 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. Encainide is a CYP2D6 substrate whose active metabolites contribute to effect and proarrhythmic risk. Desvenlafaxine weakly inhibits CYP2D6, which may shift exposure to parent drug and alter antiarrhythmic effect.
How serious is the interaction between Desvenlafaxine and Encainide?
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 ECG and clinical response for proarrhythmia or loss of effect when starting or stopping desvenlafaxine. Adjust encainide dose accordingly.
What other medicines interact with Desvenlafaxine?
MediHelp also lists interactions of Desvenlafaxine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Desvenlafaxine page.
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