Xinxin Dan, also known as Powerful Xinxin Pill, Xinxin Protector and so on, is a common rescue medicine for patients with coronary heart disease and angina pectoris. Patients with coronary heart disease, including those with risk factors related to coronary heart disease and angina attacks, can take strong heart-saving pills orally. If there is no coronary heart disease and its related symptoms, it is not possible to take the heart rescue pill. This is because oral administration of Cardiovascular Danshin without coronary heart disease may affect the normal blood supply to the heart. Cardiotonic acid can increase coronary blood flow, resulting in a decrease in myocardial oxygen consumption, thus reducing the load on the heart. At the same time, it can strengthen the coronary artery collateral circulation, which has a certain improvement effect on myocardial blood supply. Clinical evidence shows that it can effectively treat coronary heart disease, angina pectoris, myocardial ischemia has a certain effect on the improvement. Patients need to take it for 3-4 months to improve the symptoms of chest tightness, shortness of breath and chest pain. Therefore, patients with coronary artery disease can consider taking Xin Xin Dan, while patients without coronary artery disease and its related risk factors are not recommended to apply it.