Antiarrhythmics are drugs that help control the heart rate and rhythm. They do this by either suppressing the activity of tissue that is initiating electrical impulses too quickly in the heart’s natural pacemaker (the sinoatrial node) or by slowing and regulating the transmission of fast electrical impulses inside the heart. Antiarrhythmics include several classes of drugs such as sodium channel blockers, beta-blockers, potassium channel blockers, calcium channel blockers and digitalis (also called digoxin and digitoxin). The type of arrhythmia you have determines which medication you will be prescribed.


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