Drug interactions
Asenapine transdermal + Flecainide
Severity: Moderate
Asenapine transdermal and Flecainide: 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
Asenapine has a modest QT-prolonging effect, and flecainide can slow conduction and provoke arrhythmias. Taken together they may increase the risk of serious ventricular arrhythmia, especially in patients with structural heart disease.
What this interaction means in plain words
Asenapine transdermal and Flecainide 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
Additive pharmacodynamic effects on cardiac conduction and repolarization.
What to do
Obtain a baseline ECG and repeat it after the combination is started or doses change. Correct potassium and magnesium abnormalities, and choose an alternative antipsychotic in patients with heart disease.
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
Frequently asked questions
Can I take Asenapine transdermal with Flecainide?
MediHelp rates the interaction as moderate. Asenapine transdermal and Flecainide 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. Asenapine has a modest QT-prolonging effect, and flecainide can slow conduction and provoke arrhythmias. Taken together they may increase the risk of serious ventricular arrhythmia, especially in patients with structural heart disease.
How serious is the interaction between Asenapine transdermal and Flecainide?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and repeat it after the combination is started or doses change. Correct potassium and magnesium abnormalities, and choose an alternative antipsychotic in patients with heart disease.
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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