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Propafenone Hydrochloride: Brands, Price & Uses in Bangladesh
Propafenone Hydrochloride is a Class IC antiarrhythmic agent used for the following indications, classified by strength of evidence: Established / Approved Uses Life-threatening ventricular…
About Propafenone Hydrochloride
Indications of Propafenone Hydrochloride
Propafenone Hydrochloride is a Class IC antiarrhythmic agent used for the following indications, classified by strength of evidence:
Established / Approved Uses
- Life-threatening ventricular arrhythmias, such as documented sustained ventricular tachycardia, where the potential benefit outweighs the risk.
- Maintenance of normal sinus rhythm in patients with paroxysmal atrial fibrillation or atrial flutter and paroxysmal supraventricular tachycardia (PSVT), specifically in patients without structural heart disease (e.g. no significant coronary artery disease or reduced ejection fraction).
Guideline-Supported Use
- Used as part of a "pill-in-the-pocket" strategy for termination of recent-onset atrial fibrillation in selected patients without structural heart disease, under physician guidance.
Propafenone Hydrochloride is not recommended for patients with structural heart disease because of an increased risk of proarrhythmia and mortality in this population. Use should be initiated and monitored by a physician experienced in treating cardiac arrhythmias.
Dosage & Administration of Propafenone Hydrochloride
Adult Dose
| Formulation | Starting Dose | Titration | Maximum Dose |
|---|---|---|---|
| Immediate-release tablet | 150 mg every 8 hours | May increase at intervals of at least 3-4 days to 225 mg every 8 hours, then to 300 mg every 8 hours | 900 mg/day |
| Extended-release capsule | 225 mg every 12 hours | May increase at intervals of at least 5 days to 325 mg every 12 hours, then to 425 mg every 12 hours | 850 mg/day |
Pediatric Dose
Safety and efficacy of Propafenone Hydrochloride have not been established in pediatric patients; use in children is not routinely recommended and, if considered necessary, must only be under specialist pediatric cardiology supervision.
Renal/Hepatic Impairment
Propafenone Hydrochloride is extensively metabolized by the liver; in patients with significant hepatic impairment, plasma levels can rise substantially, so a markedly reduced dose (e.g. about 20-30% of the usual dose) and close monitoring are recommended. Dose adjustment for renal impairment is not usually required, but caution and monitoring are advised since some metabolites are renally excreted.
Administration Instructions
Treatment with Propafenone Hydrochloride should be started under close medical/cardiac monitoring (including baseline and periodic ECG). Take Propafenone Hydrochloride exactly as prescribed by the physician; do not change the dose, stop treatment, or skip doses without medical advice, as abrupt changes may provoke arrhythmias.
Side Effects of Propafenone Hydrochloride
Common side effects of Propafenone Hydrochloride include:
- Dizziness or light-headedness
- Unusual/metallic taste disturbance
- Nausea, vomiting, or constipation
- Blurred vision
- Fatigue or weakness
- Headache
- Palpitations
Less common but serious effects (seek prompt medical attention) include new or worsened arrhythmias (proarrhythmia), fainting, first-degree AV block or other conduction disturbances, worsening heart failure (shortness of breath, swelling), and bronchospasm (wheezing, difficulty breathing) in susceptible patients. See Precautions and Warnings for the proarrhythmia risk in detail.
Contraindications of Propafenone Hydrochloride
Propafenone Hydrochloride is contraindicated in patients with:
- Known hypersensitivity to Propafenone Hydrochloride or any component of the formulation.
- Structural heart disease, including significant coronary artery disease or reduced left ventricular ejection fraction, because of an increased risk of proarrhythmia and mortality.
- Cardiogenic shock.
- Sinoatrial, atrioventricular, and intraventricular conduction disorders (e.g. sick sinus syndrome, second- or third-degree AV block, bifascicular block) in the absence of an artificial (functioning) pacemaker.
- Marked/symptomatic bradycardia.
- Uncontrolled congestive heart failure with significantly reduced ejection fraction.
- Severe hypotension.
- Severe chronic obstructive pulmonary disease or bronchospastic disorders, due to the drug's beta-blocking activity.
- Marked electrolyte imbalance (e.g. uncorrected hypokalemia or hyperkalemia).
Frequently Asked Questions about Propafenone Hydrochloride
What is Propafenone Hydrochloride used for?
Propafenone Hydrochloride is used to treat certain serious irregular heartbeats (arrhythmias), including life-threatening ventricular arrhythmias and, in patients without structural heart disease, atrial fibrillation/flutter and paroxysmal supraventricular tachycardia, to help restore and maintain a normal heart rhythm.
Can I stop taking Propafenone Hydrochloride if I feel better?
No. Do not stop, skip, or change the dose of Propafenone Hydrochloride without first talking to your physician. Stopping abruptly or changing the dose on your own can trigger dangerous heart rhythm problems.
Is Propafenone Hydrochloride safe during pregnancy?
Propafenone Hydrochloride has not been well studied in pregnant women, so it should be used during pregnancy only if your physician decides the potential benefit clearly justifies the potential risk to the baby. Always consult your physician before use during pregnancy.
What should I avoid while taking Propafenone Hydrochloride?
Avoid starting, stopping, or changing any other medicines (including over-the-counter drugs, herbal products, and other heart medicines) without telling your physician, since several drugs interact significantly with Propafenone Hydrochloride, such as digoxin, warfarin, beta-blockers, and certain antidepressants/antifungals. Do not take extra doses to make up for a missed one.
Who should not take Propafenone Hydrochloride?
Propafenone Hydrochloride should not be used by people with structural heart disease (such as significant coronary artery disease or a weak heart pump), cardiogenic shock, certain heart conduction problems without a pacemaker, uncontrolled heart failure, severe low blood pressure, severe asthma/COPD, marked electrolyte imbalance, or known allergy to the drug. Your physician will assess whether it is appropriate for you.
What should I do if I suspect an overdose of Propafenone Hydrochloride?
An overdose of Propafenone Hydrochloride can be dangerous, causing severe drops in blood pressure, slow heart rate, or serious rhythm disturbances. Seek immediate medical attention or contact your nearest hospital emergency department or a poison control center right away; do not try to manage it at home.
Disclaimer
The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.