Infusion. The effect of infusion is different from that of injection. Infusion takes effect faster, and the dosage of infusion is more than that of injection, which can speed up the treatment effect. Infusion allows drugs to enter the blood circulation directly through venous blood vessels, eliminating the process of absorption. Injection is to inject the drug into the muscle layer of the patient, which needs to be absorbed by the muscle before it can enter the blood to play its role. The dosage of drugs and electrolytes used in infusion is higher than that of injection, such as anti-infection and killing bacteria in the body, which is faster and more obvious than injection.