Drug interactions
Flecainide + Pitolisant
Severity: Moderate
Flecainide and Pitolisant: 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
Pitolisant can prolong the QT interval modestly, and flecainide is a proarrhythmic class IC antiarrhythmic. Using both may increase the risk of ventricular arrhythmias, particularly in patients with heart disease.
What this interaction means in plain words
Flecainide and Pitolisant 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; Pitolisant belongs to Central Nervous System.
Why it happens
Additive effects on cardiac repolarization and conduction; pitolisant is also metabolized by CYP2D6 and flecainide is a CYP2D6 substrate, though a clinically significant kinetic effect is not established.
What to do
Avoid in patients with known QT prolongation or structural heart disease. Otherwise obtain a baseline ECG and monitor QTc after starting pitolisant.
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 Pitolisant
- Alfuzosin + Pitolisant Major
- Amiodarone + Pitolisant Major
- Amisulpride + Pitolisant Major
- Anagrelide + Pitolisant Major
- Asenapine + Pitolisant Major
- Bupropion + Pitolisant Major
Frequently asked questions
Can I take Flecainide with Pitolisant?
MediHelp rates the interaction as moderate. Flecainide and Pitolisant 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. Pitolisant can prolong the QT interval modestly, and flecainide is a proarrhythmic class IC antiarrhythmic. Using both may increase the risk of ventricular arrhythmias, particularly in patients with heart disease.
How serious is the interaction between Flecainide and Pitolisant?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid in patients with known QT prolongation or structural heart disease. Otherwise obtain a baseline ECG and monitor QTc after starting pitolisant.
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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