Transfusion takes effect quickly and intramuscular injection takes effect slowly. As we all know, when infusion, drugs directly enter the blood circulation and reach all parts of the body, which takes effect quickly, while when intramuscular injection, drugs are absorbed slowly, so the effect is slow. Now everyone's time is precious, and the time for seeing a doctor is limited. Everyone wants to get better soon, so sometimes, patients will take the initiative to ask for infusion bottles, but doctors are unwilling to persuade them to take medicine.