Infusion fast generally have the following effects: 1, if the amount of liquid is large, infusion faster may trigger heart failure and pulmonary edema, the patient will have difficulty breathing, or even lead to more serious situations. 2, infusion fast, for some stimulating drugs will lead to inflammatory reaction of the endothelium, causing superficial phlebitis or superficial venous thrombosis. This situation is often caused by infusion too fast, this situation can use the external application of drugs, such as Xiliao Tuo for coating.3, infusion fast may lead to special reactions of the body, such as there are some static antihypertensive drugs, when the drip rate is too fast, it may lead to a rapid drop in blood pressure and cardiac arrhythmia and other situations, the need for resuscitation. Therefore, infusion should be based on the amount of drugs as well as the characteristics of drugs, so as to choose the appropriate drip rate.