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Efficacy and Safety of 0.6% Pazufloxacin Ophthalmic Solution Versus Moxifloxacin 0.5% and Gatifloxacin 0.5% in Subjects with Bacterial Conjunctivitis: A Randomized Clinical Trial.

PURPOSE: The purpose of this study was to evaluate the clinical efficacy and safety of a novel ophthalmic solution of pazufloxacin on the ocular surface of patients with bacterial conjunctivitis after 7 days of intervention.

METHODS: This is a phase 2, double-blind, controlled, multicenter, clinical trial of 300 subjects, randomized to either a 3 dosing regimen of pazufloxacin 0.6% ophthalmic solution (twice a day [BID], n = 90; 3 times a day [TID], n = 76; 4 times a day [QID], n = 68), moxifloxacin 0.3% TID (n = 82), or gatifloxacin 0.5% TID (n = 72). Follow-up was set on days 0, 3, and 7. Assessments of ocular signs were performed, both anterior and posterior segments. The primary outcome measures included conjunctival culture and clinical signs. Safety variables included adverse events (AEs), lisamine green, fluorescein ocular surface stains, and clinical signs of tolerability.

RESULTS: After intervention, bacterial eradication was reported in all groups: pazufloxacin BID 79%, pazufloxacin TID 84%, pazufloxacin QID 84%, moxifloxacin 80%, and gatifloxacin 82%. There were no significant differences between treatments. Similar results were reported in clinical remission: pazufloxacin BID 89%, pazufloxacin TID 98%, pazufloxacin QID 92%, moxifloxacin 91%, and gatifloxacin 92% (P = 0.03 comparing pazufloxacin BID vs. TID). There were no differences between female and male responses. The AEs were not related to the interventions.

CONCLUSIONS: A simplified dosing regimen was selected to follow the development of ophthalmic pazufloxacin based on its efficacy and safety profile. Pazufloxacin, 1 drop 3 times daily, showed similar rates of bacterial eradication and clinical remission compared with other fluoroquinolones.

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