Codarone can be taken for a long period of time. Cortolone can be taken for a long period of time in the treatment of permanent arrhythmias and requires minimal effective maintenance and should be subjected to a number of regular tests. The generic name of kadalon is amiodarone, which belongs to class III antiarrhythmics, and its indications are atrial arrhythmias, ventricular arrhythmias, etc., especially in combination with heart failure, heart attack and other diseases. Its adverse reactions include changes in thyroid function, sinus bradycardia, hypotension, hepatic insufficiency, pulmonary insufficiency, and severe congestive heart failure. It is contraindicated in pregnant and lactating women. It is also important to note that blood pressure, electrocardiogram, liver function, thyroid function, lung function, and CT films of the lungs should be closely examined during the use of Kodarone.