section name header

Pronunciation

pro-PAF-en-one

Classifications

Therapeutic Classification: antiarrhythmics (class IC)

Indications

BEERS REMS


Unlabeled Use:
  • Single-dose treatment for atrial fibrillation.

Action

  • Slows conduction in cardiac tissue by altering transport of ions across cell membranes.
Therapeutic effects:
  • Suppression of ventricular arrhythmias.
  • Prolonged time to recurrence of symptomatic paroxysmal atrial arrhythmias, including paroxysmal atrial fibrillation/flutter and paroxysmal supraventricular tachycardia.

Pharmacokinetics

Absorption: 3–11% absorbed following oral administration.

Distribution: Widely distributed to tissues.

Metabolism/Excretion: Extensively metabolized by the liver by the CYP1A2, CYP2D6, and CYP3A4 isoenzymes (some metabolites have antiarrhythmic activity); the CYP2D6 isoenzyme exhibits genetic polymorphism (7% of population may be poor metabolizers and may have significantly propafenone concentrations and an risk of adverse effects). .

Half-Life: Extensive metabolizers: 2–10 hr; Slow metabolizers: 10–32 hr.

Time/Action Profile

(antiarrhythmic effects)

ROUTEONSETPEAKDURATION
POhr–days4–5 dayshr



Chronic dosing.

Contraind./Precautions

Contraindicated in:

Use Cautiously in:

Adv. Reactions/Side Effects

CV: conduction disturbances, angina, bradycardia, hypotension, SUPRAVENTRICULAR ARRHYTHMIAS, VENTRICULAR ARRHYTHMIAS

Derm: rash

EENT: blurred vision

GI: altered taste, constipation, nausea, vomiting, diarrhea, dry mouth

Hemat: AGRANULOCYTOSIS

MS: joint pain

Neuro: dizziness, shaking, weakness

Interactions

Drug-drug:

Route/Dosage

Availability

(Generic available)

Assessment

Lab Test Considerations:

Toxicity and Overdose:

Implementation

Patient/Family Teaching

Evaluation/Desired Outcomes

US Brand Names

Rythmol SR

Canadian Brand Names

Rythmol

Code

NDC Code