Drug interactions
Flecainide + Sertraline
Severity: Moderate
Flecainide and Sertraline: 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
Sertraline has a small QT effect and mild to moderate CYP2D6 inhibition at higher doses, which may modestly raise flecainide levels. The combined effect on arrhythmia risk is generally small but relevant in susceptible patients.
What this interaction means in plain words
Flecainide and Sertraline 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.
Flecainide belongs to Cardiovascular; Sertraline belongs to Central Nervous System.
Why it happens
Additive QT effects and possible mild CYP2D6 inhibition.
What to do
Monitor ECG in patients with structural heart disease or other QT risks. Check flecainide levels if the sertraline dose is high or changes.
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 Flecainide
- Flecainide + Nirmatrelvir Contraindicated
- Flecainide + Nirmatrelvir / ritonavir Contraindicated
- Flecainide + Pimozide Contraindicated
- Flecainide + Ritonavir Contraindicated
- Flecainide + Thioridazine Contraindicated
- Flecainide + Tipranavir Contraindicated
Other interactions of Sertraline
- Isocarboxazid + Sertraline Contraindicated
- Methylene blue + Sertraline Contraindicated
- Phenelzine + Sertraline Contraindicated
- Pimozide + Sertraline Contraindicated
- Selegiline transdermal + Sertraline Contraindicated
- Selegiline + Sertraline Contraindicated
Frequently asked questions
Can I take Flecainide with Sertraline?
MediHelp rates the interaction as moderate. Flecainide and Sertraline 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. Sertraline has a small QT effect and mild to moderate CYP2D6 inhibition at higher doses, which may modestly raise flecainide levels. The combined effect on arrhythmia risk is generally small but relevant in susceptible patients.
How serious is the interaction between Flecainide and Sertraline?
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 in patients with structural heart disease or other QT risks. Check flecainide levels if the sertraline dose is high or changes.
What other medicines interact with Flecainide?
MediHelp also lists interactions of Flecainide with, for example, Nirmatrelvir, Nirmatrelvir / ritonavir, Pimozide. The full list is on the Flecainide page.
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