Drug interactions
Artemether + Flecainide
Severity: Major
Artemether and Flecainide: major interaction.
Last updated Sources: US FDA label
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
Artemether can prolong the QT interval, and flecainide slows cardiac conduction and may also affect repolarization. The combination may increase the risk of ventricular arrhythmia.
What this interaction means in plain words
Artemether and Flecainide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive pharmacodynamic effects on cardiac conduction and repolarization.
What to do
Prefer an alternative antimalarial or antiarrhythmic. If both are required, record a baseline ECG, repeat it during treatment, and correct electrolyte abnormalities.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
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 Artemether with Flecainide?
MediHelp rates the interaction as major. Artemether and Flecainide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Artemether can prolong the QT interval, and flecainide slows cardiac conduction and may also affect repolarization. The combination may increase the risk of ventricular arrhythmia.
How serious is the interaction between Artemether and Flecainide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer an alternative antimalarial or antiarrhythmic. If both are required, record a baseline ECG, repeat it during treatment, and correct electrolyte abnormalities.
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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