Danhong injection refers to Danhong injection, which can be used by intramuscular injection, intravenous injection and intravenous drip, and the specific dosage cannot be generalized. 1. Intramuscular injection: the clinically recommended dosage is 2~4 ml once, 1~2 times a day. 2. Intravenous injection: the clinical recommended dosage is 4 ml once, 1~2 times a day, at the same time, need to add 50% dextrose injection 20 ml dilution. 3. Intravenous drip: the clinically recommended dosage is 20~40 ml once, 1~2 times a day, and it should be diluted by adding 5% dextrose injection 100~500 ml. For the accompanying diabetes and other special circumstances, it is necessary to use 0.9% saline dilution before use. Danhong Injection can play a role in activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body), opening the veins and relaxing the collaterals, and is mainly used in the treatment of chest pain caused by blood stasis and obstruction, palpitations (rapid heartbeat, often accompanied by panic), slurred vision, chest tightness, and other symptoms, and it can also be used in the treatment of coronary artery disease, angina pectoris, and other diseases. However, it is impossible to generalize about the specific dosage of the drug, and the doctor will formulate an appropriate treatment plan according to the actual condition. Adverse reactions include facial flushing, rash, itching, chills, high fever, chest tightness, palpitations, elevated blood pressure, nausea, vomiting, dizziness and headache. It is contraindicated for those who are allergic to the product and the ingredients contained in it, pregnant and lactating women, and those with bleeding tendency. It is not suitable for children and should be used with caution in elderly patients. In conclusion, when the body is not feeling well, you need to go to the hospital in time, strictly follow the doctor’s instructions for medication, do not self-medication.