Cardiotonic diuretics are primarily used to treat congestive heart failure. Cardiotonic agents are used to enhance the contractility of the heart muscle and improve circulation; diuretics are used to treat heart failure by reducing cardiac preload through the elimination of water from the body. The commonly used cardiotonic diuretics in clinical practice include the following: 1. Cardiotonic agents: digitalis class, such as digoxin, sildenafil, etc., has the effect of enhancing the contractility of the heart muscle; milrinone, is to inhibit the phosphodiesterase enzyme to increase the content of ATP in the heart, and increase the contractility of the heart. 2. Diuretics: clinically used furosemide, spironolactone tablets, hydrochlorothiazide, etc., through diuretic effect, discharge excess water, reduce the preload of the heart, improve the symptoms of heart failure. In short, for patients with heart failure, on the one hand, the use of cardiotonic diuretics, but also actively control the primary heart disease and some underlying diseases, such as high blood pressure, diabetes, etc., and pay attention to rest, low-salt, low-fat diet, the use of medication under the guidance of a professional doctor.