Amiodarone is a class III antiarrhythmic medication that prolongs the cardiac action potential and refractory period by blocking potassium channels, thereby stabilising abnormal heart rhythms. It is widely used to manage life-threatening ventricular and supraventricular arrhythmias, especially atrial fibrillation and ventricular tachycardia resistant to other treatments. A key clinical consideration is its potential to cause pulmonary toxicity, which can lead to serious interstitial lung disease requiring careful monitoring.
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