Flecainide is an antiarrhythmic drug that belongs to the class ic group of medications. It works by blocking voltage-gated sodium channels in cardiac myocytes, which slows the conduction of electrical impulses. This action prolongs the refractory period of the heart tissue, reducing abnormal electrical activity that can cause arrhythmias. By decreasing the velocity of depolarisation in the atrium and ventricle, Flecainide helps maintain normal heart rhythm. The medication is used to prevent and treat certain types of irregular heartbeats, such as atrial fibrillation and ventricular tachycardia. Its therapeutic effect is achieved through selective inhibition of fast sodium currents in depolarised cells. The overall result is a stabilisation of cardiac electrical activity without significantly altering the resting membrane potential.

Flecainide is a medication that works as an antiarrhythmic drug to help maintain normal heart rhythm. It is taken by mouth and belongs to a class of medicines called class i antiarrhythmics. The drug blocks sodium channels in heart cells, which slows the movement of electrical signals that cause abnormal rhythms. By stabilizing the heart's electrical activity, Flecainide reduces the frequency of irregular beats. It primarily affects the atrium and ventricle to prevent episodes of atrial fibrillation and ventricular tachycardia. The medication's effect is achieved through selective inhibition of fast sodium currents, leading to a prolonged refractory period. This mechanism allows the heart to recover more quickly between beats, restoring a regular pulse.

Flecainide works by slowing the movement of electrical signals in the heart. One common side effect is dizziness that may occur shortly after taking a dose. Some people experience a feeling of lightheadedness or faintness. Headache is another frequently reported symptom. Nausea or an upset stomach can also appear. In rare cases difficulty sleeping may develop. Palpitations that feel irregular may be noticed by patients. Fatigue or unusual tiredness can be observed after starting treatment.

Dizziness may occur after taking Flecainide. Headache is another frequently reported symptom. Some individuals experience nausea or loss of appetite. Blurred vision can affect visual clarity temporarily. Constipation is noted in a number of patients. Fatigue often leads to reduced energy levels during treatment. Skin rash may develop as an allergic response. Palpitations are reported less commonly but can be observed.