Danhong injection is a kind of Chinese medicine injection which is widely used in cardiology, and it is recommended to be infused for 2 weeks, which should be subject to the individual patient’s condition. The main ingredients of Danhong Injection are Salvia miltiorrhiza and Safflower, which have the function of activating blood circulation and resolving blood stasis, opening the veins and activating the channels. Clinical pharmacology shows that Dan Hong Injection has the effect of improving microcirculation, inhibiting platelet agglutination and dilating cardiovascular and cerebrovascular vessels. It is often used for chest paralysis and stroke caused by blood stasis and blockage, and can be used to treat various cardiovascular and cerebrovascular diseases, such as cerebral infarction, cerebral blood supply deficiency, coronary heart disease, angina pectoris, myocardial ischemia, etc., with small side effects and good results. Generally, 7 days is a course of treatment, with a maximum of 2 weeks of infusion. If the infusion is not effective for 1 week, it is recommended to change the treatment plan in time. Danhong injection adverse reactions are not uncommon. Allergic reactions may occur, resulting in itching and rash of the skin; they may also trigger gastrointestinal reactions such as nausea and vomiting; individual patients may also experience dizziness and headache.