In principle, if a drug can be taken both orally and by infusion, it is definitely better to take it orally than by infusion, and it is better to take it orally as much as possible and consider infusion only if it cannot be taken orally. Because oral administration is relatively convenient and simple, patients can take the medication at home. However, oral administration has a first pass elimination effect, that is, the oral drug is first metabolized by the liver, which may have a certain effect on the effectiveness of the drug. However, nowadays, many patients are hospitalized because their condition is more urgent or serious, so there are relatively few oral medications, so intravenous infusion of drugs is still relatively more and more widely used.