Contraindications of digitalis are those who have a history of allergy to digitalis, obstructive cardiomyopathy, arrhythmia and so on. Digitalis is also known as the ground Zhonghuang, digitalis leaves, for the Xuanzhenshen family plant Maodi Huang or hairy flowers Maodi Huang’s leaves; digitalis into the heart meridian, the nature of the bitter taste, warm, with cardiac, diuretic and other efficacy, clinically commonly used in the treatment of cardiogenic edema, heart failure, etc.; allergy to the product can cause allergic reactions such as pimples, measles after taking the side effects. Digitalis intoxication or overdose caused by heart failure aggravation or arrhythmia, pre-excitation syndrome with atrial fibrillation or flutter is prohibited; obstructive cardiomyopathy, digitalis can aggravate the left ventricular outflow tract obstruction, so it is not suitable for use, but in the accompanied by heart failure can still be applied; complete atrioventricular conduction block with heart failure is prohibited without placing a ventricular pacemaker. Sinus bradycardia ventricular rate below 50 beats per minute, atrial fibrillation or atrial flutter with complete atrioventricular block or ventricular rate below 60 beats per minute is also prohibited, in addition, allergic to the product is prohibited. If necessary, patients are recommended to use it under the supervision of a medical professional and in accordance with medical advice.