Ketorolac is the trade name, generic name is amiodarone hydrochloride tablets, the degree of side effects of one tablet a day is related to individual differences, the drug needs to be used under the supervision of a doctor. Amiodarone hydrochloride tablets are broad-spectrum antiarrhythmic drugs, which can be used for the treatment of atrial flutter, atrial fibrillation, ventricular and supraventricular arrhythmias, life-threatening ventricular pre-systole, pre-excitation syndrome, etc. Usually, loading and maintenance doses are given, and it is preferable to apply the smallest effective dose for the maintenance dose, which can be adjusted appropriately according to the individual response. Long-term use of amiodarone hydrochloride tablets can produce hypersensitivity pneumonitis, interstitial or alveolar fibrosing pneumonia, small bronchial lumen occlusion, hyperthyroidism, common side effects in the elderly are hypothyroidism, in addition to corneal particulate deposition in the eye, affecting vision, the nervous system will be tremor, ataxia, and so on. It is contraindicated in patients with sinus bradycardia, sinus block, sick sinus node syndrome, severe atrioventricular conduction abnormality without a pacemaker, and in patients with hyperthyroidism. Because amiodarone contains lactic acid, it is contraindicated in patients with congenital galactosemia and lactase deficiency, and patients must follow the doctor’s instructions for the use of the drug.