Cefixime in the treatment of patients with lower respiratory tract infections: results of US clinical trials.

Community-acquired acute lower respiratory tract infections are a common cause of illness, accounting for millions of physician visits and prescriptions each year. Cefixime is an extended-spectrum oral cephalosporin with activity against Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis, the most commonly isolated bacterial pathogens. This review presents the results of eight US studies comparing the efficacy and safety of cefixime with those of amoxicillin, amoxicillin/clavulanate, cefaclor, cephalexin, and cefuroxime axetil in the treatment of patients with acute lower respiratory tract infections. Data for 211 cefixime-treated patients and a range of 19 to 49 patients in the comparator treatment groups were included in the efficacy analysis. Clinical success (cure or improvement) was observed in 94% of cefixime-treated patients; clinical success rates in the comparator treatment groups ranged from 97% for cefuroxime axetil and cefaclor to 79% for amoxicillin/clavulanate. At the end of treatment, the overall eradication rate in the cefixime treatment group was 92% and ranged from 76% (cefaclor) to 98% (cefuroxime axetil) in the comparator treatment groups. The percentage of persistent organisms was highest in the cefaclor (24%) and cephalexin (21%) treatment groups. With the exception of the cephalexin group (4%), the incidence of patients who reported adverse experiences was similar across treatment groups (34% to 50%). Those involving the gastrointestinal tract were by far the most common, and most adverse experiences were rated as mild or moderate in severity.