The first line antiarrhythmic drug for atrial fibrillation is typically flecainide. This drug belongs to a class of drugs called Class IC antiarrhythmics and helps to stop the disorganized electrical signals that can cause atrial fibrillation. Flecainide works by slowing down the rate of the electrical impulses in the heart, thereby helping to restore normal rhythm.
Flecainide is usually recommended as a first-line treatment for atrial fibrillation because studies have shown that it is effective in controlling the symptoms of the condition. It is generally well-tolerated, but it can cause some side effects in some people. These include nausea, abdominal pain, dizziness, and headaches. It is important to speak with your doctor about any concerns you may have before taking this medication.
In some cases, other antiarrhythmic drugs may be recommended as first-line treatment for atrial fibrillation. These include amiodarone, sotalol, and propafenone. It is important to discuss all treatment options with your doctor so that you can make an informed decision about the best course of action for your individual situation.