Vasodilators include nitroglycerin, sodium nitroprusside, etc.; diuretics include furosemide, etc.; and cardiotonic drugs include digoxin, among others. Vasodilator diuretics cardiotonic drugs usually refer to the drugs used to treat heart failure. 1. Vasodilator drugs include nitroglycerin, sodium nitroprusside, hydralazine and so on. These drugs can dilate the veins, so that the venous return blood volume is reduced, reducing the preload of the heart; dilate the small arteries, reduce peripheral resistance, reduce the afterload of the heart, in order to improve the symptoms of acute heart failure. 2. Diuretics include furosemide and hydrochlorothiazide. Diuretics can promote the excretion of water and sodium, reduce blood volume, reduce cardiac preload, so as to improve cardiac function. These drugs have a very important role in the treatment of heart failure, and are still the first-line drugs widely used in the treatment of various heart failure. 3. Cardiotonic drugs include digoxin and sildenafil. These drugs have the effect of positive inotropy and slowing down the heart rate. Cardiotonic drugs are now mostly used in patients with heart failure who have predominantly systolic dysfunction. Patients with abnormal cardiac function should seek prompt medical attention. The use of medication should be in accordance with medical advice.