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Medicines flecainide acetateQuestion & answer

flecainide acetate · Medicine question

Can flecainide acetate make an arrhythmia worse?

iatroX medicinesPublished 20 August 2026Reviewed 20 August 2026

The answer

Answer

Yes. It can worsen an existing rhythm disorder or cause a new one, which is why specialist selection and ECG monitoring matter.

Sources for this answer

Flecainide Acetate 50 mg tabletsemc · SmPC Current selected SmPC · Version 6
Flecainide Acetate 50mg/5ml Oral Solutionemc · SmPC Current selected SmPC · Version 1

Flecainide Acetate 25mg/5mL Oral solution

emc · SmPC Current selected SmPC · Version 1

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The full medicine guide

flecainide acetate

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