Danhong generally refers to Danhong Injection, which is mainly effective in activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body), clearing the veins and relaxing the collaterals, and can be used for treating chest paralysis (tightness and pain in the chest) and stroke caused by blood stasis and obstruction. Its side effects include headache, dizziness, palpitation (rapid heartbeat, often accompanied by panic), chest tightness, dyspnea, chills, fever, flushing of the face, nausea, vomiting, diarrhea, rash, itching, edema of the larynx, and convulsions. Danhong Injection is a proprietary Chinese medicine, which mainly contains danshen, safflower and other traditional Chinese medicines, with the efficacy of activating blood circulation, removing blood stasis, clearing the veins and relaxing the collaterals, it can be used for the treatment of thoracic paralysis and stroke caused by blood stasis and obstruction, which is indicated by palpitation, chest pain, chest tightness, lopsidedness of the mouth and eyes, numbness of the limbs, unfavorable activities, etc. It can also be used in the treatment of coronary heart disease, angina pectoris, stasis pulmonary heart disease, cerebral thrombosis and other patients with the above symptoms. Its side effects are more, but after stopping the drug can return to normal, but pregnant women, lactating women and those who are allergic to the product or have a history of serious adverse reactions, or bleeding tendency should be prohibited, the specific use of the product should also be under the guidance of the physician to follow the doctor’s instructions.