Digitalis poisoning should be discontinued immediately and different measures should be taken depending on the manifestations. Digitalis poisoning should be discontinued immediately and measures such as treatment with potassium supplementation, application of phenytoin sodium, lidocaine, atropine or digoxin antibodies can be taken according to different manifestations. When there is a single-onset precontraction or atrioventricular block, the drug can be discontinued for observation, and it usually disappears on its own after discontinuation. In case of tachyarrhythmia, intravenous potassium supplementation may be considered. If potassium is normal, more severe tachyarrhythmia may be treated with phenytoin sodium. If ventricular tachycardia or ventricular fibrillation is present, lidocaine is used. However, chronic arrhythmias such as sinus bradycardia or atrioventricular block should not be treated with potassium supplements and should be treated with atropine. Severe malignant arrhythmias such as ventricular tachycardia, ventricular fibrillation, and high atrioventricular block may be life-threatening and require prompt resuscitation. When gastrointestinal symptoms such as nausea, vomiting, diarrhea, etc. occur, they usually improve after discontinuation of the drug or symptomatic treatment such as potassium supplementation. If there are neurological symptoms such as dizziness, headache, abnormal vision, etc., most of them can also recover after stopping the drug. In addition, digoxin antibodies are available abroad and can be used to treat severe or life-threatening digitalis poisoning. As digitalis has a small safe range and is prone to poisoning, digitalis poisoning is more likely to occur in a state of low potassium and hypoxia, so attention should be paid to regular rechecking of blood potassium and blood oxygen when applying digitalis treatment. After digitalis poisoning, stop the drug immediately and seek professional advice from a doctor as soon as possible.