Drug interactions
Encainide + Ranolazine
Severity: Moderate
Encainide and Ranolazine: 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 class IC antiarrhythmic activated and cleared via CYP2D6, and ranolazine weakly inhibits this enzyme. Altered encainide and metabolite levels could change its proarrhythmic and conduction effects, though the magnitude is likely small.
What this interaction means in plain words
Encainide and Ranolazine 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
Ranolazine weakly inhibits CYP2D6, altering the metabolism of encainide to its active metabolites.
What to do
Monitor the ECG for QRS and QT changes and for arrhythmia when combining these agents. Adjust the encainide dose if conduction abnormalities develop.
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 Ranolazine
- Adagrasib + Ranolazine Contraindicated
- Amobarbital + Ranolazine Contraindicated
- Apalutamide + Ranolazine Contraindicated
- Butabarbital + Ranolazine Contraindicated
- Carbamazepine + Ranolazine Contraindicated
- Clarithromycin + Ranolazine Contraindicated
Frequently asked questions
Can I take Encainide with Ranolazine?
MediHelp rates the interaction as moderate. Encainide and Ranolazine 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 class IC antiarrhythmic activated and cleared via CYP2D6, and ranolazine weakly inhibits this enzyme. Altered encainide and metabolite levels could change its proarrhythmic and conduction effects, though the magnitude is likely small.
How serious is the interaction between Encainide and Ranolazine?
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 the ECG for QRS and QT changes and for arrhythmia when combining these agents. Adjust the encainide dose if conduction abnormalities develop.
What other medicines interact with Ranolazine?
MediHelp also lists interactions of Ranolazine with, for example, Adagrasib, Amobarbital, Apalutamide. The full list is on the Ranolazine page.
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