Objective:This article is to compare the efficacy and safety of 1 g versus 2 g ceftriaxone daily for treatment of patients with lower respiratory tract infection.Method:a randomized,controlled,multi\|center clinical study was conducted in 102 hospitalized patients.Fifty patients received ceftriaxone 1 g and 52 patients received ceftriaxone 2 g daily by intravenous infusion.The duration was 7 days in the 2 groups.Results:The overall efficacy rates for the 1 g group and 2 g group were 84.6% and 94.0% respecti...