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Flecainide 50mg

Description Of Product

Antiarrhythmic Agent, Class Ic

“Alert: Black Box Warning

An excessive mortality or nonfatal cardiac arrest rate was seen in patients treated with flecainide compared with that seen in patients assigned to a carefully matched placebo-treated group. It is prudent to consider the risks of Class ΙC agents (including flecainide), coupled with the lack of any evidence of improved survival, generally unacceptable in patients without life-threatening ventricular arrhythmias, even if the patients are experiencing unpleasant, but not life-threatening, symptoms or signs.

Ventricular Proarrhythmic Effects in Patients with Atrial Fibrillation/Flutter
A review of the world literature revealed reports of 568 patients treated with oral flecainide for paroxysmal atrial fibrillation/flutter (PAF). Ventricular tachycardia was experienced in 0.4% of these patients. Of 19 patients in the literature with chronic atrial fibrillation (CAF), 10.5% experienced ventricular tachycardia (VT) or ventricular fibrillation (VF). Flecainide is not recommended for use in patients with CAF. Case reports of ventricular proarrhythmic effects in patients treated with flecainide for atrial fibrillation/flutter have included increased premature ventricular contractions (PVCs), VT, VF, and death.  As with other Class Ι agents, patients treated with flecainide for atrial flutter have been reported with 1:1 atrioventricular conduction due to slowing the atrial rate. A paradoxical increase in the ventricular rate also may occur in patients with atrial fibrillation who receive flecainide.”

CSA NA – FDA Approved – REMS (N) – Can Ship

How Does It Work

Flecainide is a Class Ic antiarrhythmic which slows down conduction in cardiac tissue by altering transport of ions across cell membranes; causing slight prolongation of refractory periods; decrease in the rate of rise of the action potential without affecting its duration; increase in electrical stimulation threshold of ventricle while have a moderately negative inotropic effect.

Indications For Use

Paroxysmal Atrial Fibrillation/Flutter and Paroxysmal Supraventricular Tachycardia, Ventricular Arrhythmias


Before starting Flecainide make sure your physician is aware of any allergies or medications you currently take.  The proarrhythmic effects of Flecainide include an increase in premature ventricular contractions, ventricular tachycardia, ventricular fibrillation, and death in patients with atrial fibrillation.  Flecainide is not recommended for patients with chronic atrial fibrillation. Flecainide can cause electrolyte disturbances (i.e. hypokalemia, hypomagnesemia), hepatic and renal impairment.

Usual Dosing

Oral: 50mg to 200mg twice daily.

Pharmacist Tips On Using

How to Take:

When used for the management of fetal tachycardia, oral doses of Flecainide should be given to the fetus can receive through the maternal/transplacental route.

Side Effects

Dizziness, visual disturbances, dyspnea, palpitations, chest pain, edema, tachycardia, proarrhythmic, sinus node dysfunction, syncope, headache, fatigue, nervousness, fever, hypoesthesia, paresis, ataxia, vertigo, tinnitus, anxiety, insomnia, depression, rash, nausea, constipation, abdominal pain, anorexia, diarrhea, tremor, weakness, paresthesia, blurred vision, diplopia. 

Note this is not a complete list of side effects for Flecainide only common ones.

Frequently Asked Questions

  1. Why would my physician prescribe a medication with such serious side effects?
    Your physician takes the most recent clinical guidelines to make evidence-based decisions on what medication is appropriate in which situations.  Your current medications, your allergies, age, cost of medication, comorbid conditions and many other factors will further complicate or limit which medications are appropriate.  This medication is used for many serious condition(s) and your physician has determined the benefits outweigh the risks.   Furthermore, they will be monitoring your bloodwork and symptoms closely to see if any serious complications are starting to arise and be able to adjust therapy to prevent progression.

Disclaimer: All information contained in and provided by UBACARE Your Intelligent Health Company is provided for educational purposes only. This information should not be used for diagnosis or treatment of any health problem or disease. This information is not intended to replace clinical judgement or guide individual patient care in any manner.

The User is hereby notified that the information contained herein may not meet the user’s needs. The User is advised that, although the information is derived from medical research and literature, we cannot guarantee either its correctness, comprehensiveness or currency.

UBACARE Your Intelligent Health Company nor any of its affiliated parties shall be liable for any damage resulting in whole or part from any User’s use of or reliance upon the information contained within.


All orders received prior to 3:00pm PST on business days will ship the following day; peak season and holiday shipping days may require an additional 24 hours. UBACARE Pharmacy will make every effort to ship each order as quickly as possible. Orders received over the weekend will ship the following Monday as our shipping department is closed Saturday and Sunday.

We offer shipping via Canada Post within Canada.
We offer shipping via USPS and UPS within the continental United States and worldwide. Expedited shipping options are available at checkout if you want to receive your order sooner.

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UBACARE is committed to providing transparency for all its products sold online. We will share with you details such as production country, supplier names and approval status so it is easier for our customers to make more informed choices when shopping with us.

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UBACARE stands behind the quality of our exclusive line products by offering a 100 percent money-back guarantee to ensure customer satisfaction. To ensure the best quality, all UBACARE products are held to the strict guidelines to achieve both FDA and Health Canada Approval. UBACARE recognizes the outside agencies such as the FDA cannot control what manufacturers in other countries do and that no amount of FDA inspection can ensure a reliable supply of vital medical products. As a result, UBACARE has elected dispense primarily Canadian made generics drugs to minimize risk of contaminated products.

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Our team of pharmacists and technicians will work with you and your doctor to find therapeutic alternatives and other options to help you save.

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UBACARE has taken the initiative on selling ONLY generics drug companies that source their API and FDF from North American and European companies who have the proven capabilities of meeting high-quality standards.


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