Used primarily in the treatment of cardiac arrhythmias, it helps regulate abnormal heart rhythms by blocking beta-adrenergic receptors and prolonging the cardiac action potential. It is effective in managing both ventricular and supraventricular arrhythmias, providing stability to heart rhythm. Additionally, it is prescribed for patients with atrial fibrillation or flutter to maintain normal sinus rhythm. Its dual action as a beta-blocker and potassium channel blocker makes it suitable for patients with complex arrhythmia conditions. Always administered under medical supervision due to potential side effects like bradycardia or QT prolongation.