Ketorolac is the trade name, the generic name of the drug is amiodarone hydrochloride tablets, for the different stages of the disease, the usage and dosage are different, if in the treatment period of the disease, it is usually 600 mg a day, continuously applied for 8~10 days, if the disease is stable, it should be given 100~400 mg a day, according to the individual response. Amiodarone hydrochloride tablets can be used for the treatment of cardiac arrhythmia, especially in patients with combined organic heart disease. After taking the drug, possible adverse reactions include corneal microprecipitations, photoallergic reactions, skin pigmentation, hypothyroidism, diffuse interstitial or alveolar lung disease, tremor, nocturnal sleep disturbances, transient elevation of hepatic aminotransferases, dose-dependent bradycardia, and gastrointestinal reactions such as nausea and vomiting. Amiodarone hydrochloride tablets are contraindicated in patients with sinus bradycardia and sinoatrial block without pacemakers, patients with sinus node disease, patients with high degree of atrioventricular block, patients with hyperthyroidism, pregnant and breastfeeding women, and those who are allergic to the drug and its components. It is recommended that patients, if necessary, should be taken under the guidance of a doctor, do not adjust the dosage to avoid adverse effects.