广谱青霉素类已广泛用于治疗早期的下呼吸道感染,并已证明氨苄青霉素、匹氨青霉素和羟氨苄青霉素等几种药物都对其有效。然而,氨苄青霉素当口服给药时则吸收较差,且造成下胃肠道的副作用较多,故不适宜于老年人使用。相反,匹氨青霉素和羟氨苄青霉素甚少会引起腹泻。为此,本文特采用这两种青 Wide-spectrum penicillins have been widely used in the treatment of early lower respiratory tract infections and several drugs, ampicillin, penicillin and amoxicillin, have proven effective. However, ampicillin is poorly absorbed when administered orally and causes more side effects of the lower gastrointestinal tract and is therefore not suitable for use in the elderly. In contrast, penicillin and amoxicillin seldom cause diarrhea. To this end, this article special use of these two green