Drug interactions
Flecainide + Paliperidone
Severity: Moderate
Flecainide and Paliperidone: 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
Paliperidone can prolong the QT interval and flecainide has proarrhythmic potential and slows conduction. Used together, they may increase the risk of ventricular arrhythmia.
What this interaction means in plain words
Flecainide and Paliperidone 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; Paliperidone belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic effects on cardiac repolarization and conduction.
What to do
Check ECG at baseline and after dose changes and correct potassium and magnesium. Consider an alternative if QTc becomes significantly prolonged.
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 Paliperidone
- Ibutilide + Paliperidone Contraindicated
- Paliperidone + Pimozide Contraindicated
- Paliperidone + Vandetanib Contraindicated
- Adagrasib + Paliperidone Major
- Amiodarone + Paliperidone Major
- Amisulpride + Paliperidone Major
Frequently asked questions
Can I take Flecainide with Paliperidone?
MediHelp rates the interaction as moderate. Flecainide and Paliperidone 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. Paliperidone can prolong the QT interval and flecainide has proarrhythmic potential and slows conduction. Used together, they may increase the risk of ventricular arrhythmia.
How serious is the interaction between Flecainide and Paliperidone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check ECG at baseline and after dose changes and correct potassium and magnesium. Consider an alternative if QTc becomes significantly prolonged.
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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