I am a 75-year-old woman who, 10 years ago, was diagnosed with atrial fibrillation (an abnormal heart rhythm) and put on digoxin. At that time, I was going to exercise classes and leading a reasonably active life.
Flecainide acetate (Tambocor) is a sodium-channel-blocking antiarrhythmic drug specifically prescribed for life-threatening cases of tachycardia (excessively rapid heartbeat). According to the British National Formulary,
Tambocor (flecainide) is one of a group of antiarrhythmics called ‘class I agents’, or sodium-channel blockers. Class II agents are the beta-blockers, and class IV agents are calcium antagonists.