Propafenone

Generic name: propafenone [ proe-PAF-e-none ]
Brand names: Rythmol, Rythmol SR
Dosage forms: oral capsule, extended release (225 mg; 325 mg; 425 mg); oral tablet (150 mg; 225 mg; 300 mg)
Drug class:Group I antiarrhythmics

Medically reviewed by Drugs.com on Nov 3, 2021. Written by Cerner Multum.

What is propafenone?

Propafenone is a Class IC anti-arrhythmic that affects the way your heart beats.

Propafenone is used in certain situations to prevent serious heart rhythm disorders.

Propafenone may also be used for purposes not listed in this medication guide.

Warnings

You should not use propafenone if you have heart failure, Brugada syndrome, sick sinus syndrome, AV block (without a pacemaker), severe low blood pressure, very slow heartbeats, a severe electrolyte imbalance, shortness of breath, or if you recently had a heart attack.

Propafenone may cause a new or worsening heartbeat pattern. Call your doctor at once if you have fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness.

Before taking this medicine

You should not use propafenone if you are allergic to it, or if you have:

• heart failure, or if you have recently had a heart attack;

• a genetic heart condition called Brugada syndrome;

• a serious heart condition such as "sick sinus syndrome" or "AV block" (unless you have a pacemaker);

• severe low blood pressure, or history of slow heart beats that have caused you to faint;

• a severe or uncontrolled electrolyte imbalance; or

• wheezing or shortness of ...