Flecainide is used to treat or prevent various types of heartbeat irregularities associated with serious health risks.


What is Flecainide?

Flecainide is an antiarrhythmic drug. It works by stabilizing rapid or irregular heart rhythm.


How should Flecainide be taken?

Flecainide is typically administered orally in the form of tablets. 


Side effects associated with Flecainide

Among the possible side effects of Flecainide include the following:


  • Tarnished vision
  • Constipation
  • Dizziness
  • Tendency to faint
  • Headache
  • Nausea
  • Eye floaters
  • Stomach discomfort
  • Fatigue
  • Weakness
  • Instability


It is important to contact a doctor immediately if you experience: 


  • Rash
  • Urticaria
  • Itch
  • Difficulty breathing
  • Tightness in chest
  • Swelling of the mouth, face, lips or tongue
  • Chest pain
  • Fainting
  • Fast or irregular heartbeat
  • Heart attack
  • Feeling faint or lightheaded
  • Heaviness in the chest
  • Convulsions
  • Tremors
  • Jaundice


Contraindications and warnings associated with the use of Flecainide

Flecainide can compromise the ability to drive or operate hazardous machinery, especially when taken together with alcohol or other drugs. This drug should not be taken together with HIV protease inhibitors and in cases involving severe heart problems.


Before starting treatment with Flecainide, it is also important to tell your doctor if:


  • You have any allergies to the active substance, its excipients, or any other drugs or food
  • You are taking any other medications, herbal remedies or supplements. Mentioning in particular:  other antiarrhythmic agents, calcium channel blockers, cimetidine, HIV protease inhibitors, SNRIs, droperidol, pimozide, serotonin receptor antagonists, or digoxin zipradisone
  • You are suffering (or have suffered) from heart disease, kidney or liver problems, or abnormalities in the levels of potassium in the blood
  • You are pregnant or breast-feeding


It is important to inform physicians, surgeons and dentists of any ongoing treatment with flecainide.