The main side effects of amiodarone are thyroid dysfunction, corneal iodine particle deposition, lethal pulmonary toxicity, and cardiotoxicity. Depending on the condition of the disease, the duration of administration varies and should be in accordance with medical advice. Amiodarone contains iodine in the molecule, which can cause thyroid dysfunction and corneal brownish-yellow particle deposition. Gastrointestinal reactions such as loss of appetite, nausea, vomiting, and constipation are common, and pulmonary fibrosis and interstitial pneumonia are seen in severe cases. The depressant effect on the heart can lead to sinus bradycardia and atrioventricular block. Amiodarone oral absorption is slow and incomplete, continuous use of 1 week onset of action, the effect of 3 weeks to reach the peak, the effect can be maintained for about 1 month after discontinuation. Depending on the disease, the duration of amiodarone use varies, and it can be used for several days, weeks or long-term maintenance. It is recommended that amiodarone be used under the supervision of a doctor, and that any discomfort during the course of the medication be treated promptly by a doctor. Iodine allergy, thyroid dysfunction, bradycardia, atrioventricular block and other patients are prohibited. The drug is contraindicated in children and women during pregnancy and lactation.