Drug interactions
Epinephrine racemic + Flecainide
Severity: Moderate
Epinephrine racemic 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
Epinephrine is arrhythmogenic and can cause QT changes and tachyarrhythmias, while flecainide has proarrhythmic potential. Combined use may increase the risk of ventricular arrhythmia, though the clinical significance depends on dose and route.
What this interaction means in plain words
Epinephrine racemic 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 proarrhythmic effects; beta-adrenergic stimulation combined with sodium channel blockade.
What to do
Monitor ECG and heart rhythm when systemic or high-dose epinephrine is used with flecainide. Use the lowest effective epinephrine dose.
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 Epinephrine racemic with Flecainide?
MediHelp rates the interaction as moderate. Epinephrine racemic 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. Epinephrine is arrhythmogenic and can cause QT changes and tachyarrhythmias, while flecainide has proarrhythmic potential. Combined use may increase the risk of ventricular arrhythmia, though the clinical significance depends on dose and route.
How serious is the interaction between Epinephrine racemic 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: Monitor ECG and heart rhythm when systemic or high-dose epinephrine is used with flecainide. Use the lowest effective epinephrine dose.
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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