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Cefprozil versus cefaclor in the treatment of acute and uncomplicated urinary tract infections. Cefprozil Multicenter Study Group.

Cefprozil is a new oral cephalosporin with an in vitro spectrum of activity that includes the pathogens most commonly associated with acute and uncomplicated urinary tract infections (UTIs). A multicenter, randomized study was conducted to compare the clinical efficacy and safety of cefprozil, administered once daily, with cefaclor, administered three times a day, for ten days in patients 2 years of age or older who had acute and uncomplicated UTIs. The rate of satisfactory clinical response in evaluable patients was 87% in the cefprozil group and 84% in the cefaclor group. The patient bacteriologic response rates were also similar: 83% for cefprozil and 85% for cefaclor. The overall effective response rate for both cefprozil and cefaclor was 77%. Both drugs were well tolerated, with no difference in the incidence of drug-related adverse events. Because of its efficacy and once-daily dosing regimen, cefprozil may be an alternative to currently available oral antibiotics in the treatment of UTIs.