For arrhythmias due to cardiac glycosides, beta-blockers and calcium channel antagonists, such as metoprolol tartrate and captopril, can be chosen, and lidocaine can be the drug of choice. Lidocaine injection for cardiac arrhythmias caused by cardiac glycoside poisoning has an antagonistic effect and can correct arrhythmias, and is useful for ventricular arrhythmias due to cardiac glycoside-like poisoning. When taking cardiac glycosides, the drug must be used under the guidance of a professional cardiologist, and the dosage must be strictly controlled, and the dosage must be reduced and corrected when symptoms of toxicity appear. Cardiac glycosides are positive inotropic drugs, mainly to increase heart function, and are often used in the treatment of chronic heart failure, using maintenance doses can play a positive role, if the dose is too large will lead to poisoning.