Sitafloxacin hydrate for bacterial infections
Abstract
Sitafloxacin hydrate (DU-6859a, Gracevit), a new-generation, broad-spectrum oral fluoroquinolone that is very active against many Gram-positive, Gram-negative and anaerobic clinical isolates, including strains resistant to other fluoroquinolones, was recently approved in Japan for the treatment of respiratory and urinary tract infections. Sitafloxacin is active against methicillin-resistant staphylococci, Streptococcus pneumoniae and other streptococci with reduced susceptibility to levofloxacin and other quinolones and enterococci. Sitafloxacin has also demonstrated activity against clinical isolates of Klebsiella pneumoniae (including about 67% of strains producing extended-spectrum, beta-lactamases and resistant to ciprofloxacin), Enterobacter cloacae, Pseudomonas aeruginosa with some activity against quinolone-resistant strains and Acinetobacter baumannii. The in vitro activity against anaerobes is comparable to imipenem or metronidazole. In a published phase II randomized, open-label, multicenter study of patients hospitalized with pneumonia, sitafloxacin (400 mg once daily) was comparable to imipenem/cilastatin (500 mg three times a day). Results of the phase III trials of sitafloxacin are not available in English. The clinical safety profile of sitafloxacin has been characterized from 1,059 patients who participated in 10 clinical trials. The most common events with 50 or 100 mg twice daily were gastrointestinal disorders (17.2%), mostly diarrhea, and abnormal…
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