Infusion and injection are not the same. Generally speaking, infusion works faster, and the dose used for infusion is more than that for injection, which can speed up the effect of treatment. Infusion is through the vein blood vessels so that the drug directly into the blood circulation, eliminating the process of absorption, injection means the drug is injected into the patient’s muscle layer, need to be absorbed through the muscle into the bloodstream in order to play a role, so the effect of infusion is faster. And the dose of drugs and electrolytes used in infusion is higher than that of injection, for example, to fight infection and kill germs in the body will be faster and more obvious than the effect of injection. The National Health and Family Planning Commission has always emphasized the principle of “no injection if you can take medicine, no infusion if you can get an injection”. Therefore, the choice of infusion or injection is based on the severity of the disease. The decision should be made by the doctor after weighing the clinical manifestations and relevant examination results.