The usual dosage of Digoxin Tablets is 0.125~0.5mg (i.e. half to one tablet daily) once a day, and the usual dosage for pediatric patients varies according to age. 1. The usual dosage of digoxin tablets for adults and those aged 10 years or above is 0.125~0.5mg (i.e. half to one tablet daily) once a day, and the specific dosage is adjusted according to the condition. The usual dose for premature infants is 0.02~0.03mg/kg, for newborns under 1 month 0.03~0.04mg/kg, for 1 month~2 years 0.05~0.06mg/kg, and for 5~10 years 0.02~0.035mg/kg. It can be given in 3 doses or every 6 to 8 hours, every 12 hours or once a day. 2. Adverse reactions: Nausea, vomiting, dizziness, headache, confusion and other adverse reactions may occur with digoxin. 3. Contraindications: Combination with calcium injections is prohibited, intoxication to any digitalis preparations, ventricular tachycardia, ventricular fibrillation, hypertrophic obstructive cardiomyopathy, preexcitation syndrome with atrial fibrillation or flutter. 4. Precautions: The administration of digoxin may increase the risk of ventricular fibrillation in patients with atrioventricular bypass (preexcitation syndrome), the risk of ventricular arrhythmias during electrical cardioversion, and the risk of vasoconstriction in patients with myocarditis. It may also cause digoxin toxicity manifesting as nausea, vomiting, vision changes, and cardiac arrhythmias. The drug should be used under the guidance of a specialized physician, adjusting the dosage according to the specific condition, and should not be taken blindly by yourself to avoid adverse reactions.