为观察两种不同剂量头孢三嗪的临床疗效，随机选择７０ 例呼吸道感染患者，分别采用每日２ｇ 和４ｇ 两种剂量治疗（疗程６～１４ｄ）。结果两组有效率分别为８５７％ 、８８６％ ，两组在治愈、显效、无效等方面相比无显著性差异，细菌清除率分别为９１３％ 、８７５％ （ Ｐ＞ ０．０５）。说明头孢三嗪每日２ｇ 可取得满意的临床疗效 To observe the clinical efficacy of two different doses of ceftriaxone, 70 patients with respiratory tract infection were randomly selected and treated with daily 2g and 4g doses of 6 to 14 days. Results The effective rates of the two groups were 857% and 886% respectively. There was no significant difference between the two groups in terms of cure, effective and ineffectiveness. The clearance rate was 913% and 875% respectively (P > 0.05). Description ceftriaxone 2g daily can be satisfied with the clinical efficacy