The hazards and side effects of Sotalol include hypotension, bradycardia, and conduction block, etc., and the medication should be administered under the assessment, guidance, and observation of a physician. Sotalol is available in oral and intravenous formulations; the former can be used to combat ventricular tachycardia, atrial flutter, and atrial fibrillation, while the latter is indicated for a variety of life-threatening ventricular tachyarrhythmias. The possible hazards and side effects of the drug include hypotension, bradycardia, bronchospasm, weakness, dizziness, nausea, vomiting, rash, aggravation of existing arrhythmias or causing new arrhythmias. However, the occurrence of the above side effects is related to the specific condition and drug reactivity. The drug is contraindicated in patients with bronchial asthma, sinus bradycardia, high degree of atrioventricular block, cardiogenic shock, allergy, etc. It should be used with caution in patients with renal insufficiency. The medication should be administered under the evaluation, guidance and observation of a physician, and should be discontinued immediately if any adverse reaction occurs after the administration of the drug.