The principle of action of quick-acting heart-saving pills is usually to improve the microcirculation of the heart and increase coronary blood flow, thereby relieving angina. The principle of action of quick-acting heart-saving pills is mainly to improve the microcirculation of the heart itself, but also able to diastole vascular smooth muscle in order to dilate the coronary arteries, thereby increasing coronary artery blood flow, through the resistance of myocardial ischemia to alleviate angina pectoris, suffocation, dyspnea and other phenomena, which can also effectively reduce blood viscosity, and thus inhibit the formation of atherosclerosis. Adverse effects of Quick-acting Heart Saving Pills include nausea, vomiting, diarrhea, etc. Patients with low blood pressure should avoid taking it. The use of medication should be under the guidance of a professional doctor and should not be used without authorization.