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Randomized double-blind trial of high- and low-dose fleroxacin versus norfloxacin for complicated urinary tract infection.

Author(s): Pittman W, Moon JO, Hamrick LC Jr, Cox CE, Clark J, Childs S, Pizzuti D, Fredericks J, St Clair P

Affiliation(s): Lloyd Noland Hospital and Health Centers, Fairfield, Alabama 35064.

Publication date & source: 1993-03-22, Am J Med., 94(3A):101S-104S.

Publication type: Clinical Trial; Multicenter Study; Randomized Controlled Trial

Patients were entered in a double-blind, placebo-controlled, multicenter study to compare low- and high-dose fleroxacin with norfloxacin for the treatment of complicated urinary tract infection (UTI). A total of 296 patients were enrolled; 102, 97, and 97 patients were randomized to receive 200 mg of fleroxacin (low-dose), 400 mg of fleroxacin (high-dose), both once daily, or 400 mg of norfloxacin twice daily, respectively, for 10 days. Of these patients, 101, 94, and 95 were included in the safety analysis, and 71, 61, and 58 in the efficacy analysis. The main reason for exclusion from the efficacy analysis was failure to isolate a pathogen at baseline. The groups were comparable with respect to demographics. In the low-dose fleroxacin group, 68 (96%) of 71 patients had bacteriologic cures (eight with superinfection), compared with 56 (92%) of 61 in the high-dose fleroxacin group (two with superinfection) and 52 (90%) of 58 in the norfloxacin group (four with superinfection). Escherichia coli was the most frequent isolate in all groups. In the low-dose fleroxacin group, clinical cure was recorded in 61 (86%) of 71, improvement in six, and failure in four. In the high-dose group, clinical cure was noted in 58 (95%) of 61 patients, improvement in two, and failure in one. In the norfloxacin group, 50 (86%) of 58 patients were clinically cured, four were improved, and four failed. Clinical adverse events were reported by 22 (22%) of 101, 36 (38%) of 94, and 19 (20%) of 95 patients in the low-dose fleroxacin, high-dose fleroxacin, and norfloxacin groups, respectively. Insomnia and nausea were reported most frequently in the fleroxacin groups, and nausea and headache were most common in the norfloxacin group. The efficacy and safety of low-dose fleroxacin are comparable to those of norfloxacin for treatment of complicated UTI.

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