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  • Title: Efficacy and safety of besifloxacin ophthalmic suspension 0.6% compared with moxifloxacin ophthalmic solution 0.5% for treating bacterial conjunctivitis.
    Author: McDonald MB, Protzko EE, Brunner LS, Morris TW, Haas W, Paterno MR, Comstock TL, Usner DW.
    Journal: Ophthalmology; 2009 Sep; 116(9):1615-1623.e1. PubMed ID: 19643483.
    Abstract:
    OBJECTIVE: To compare the clinical and antimicrobial efficacy of besifloxacin ophthalmic suspension 0.6% with that of moxifloxacin ophthalmic solution 0.5% for the treatment of bacterial conjunctivitis. DESIGN: Multicenter, randomized, double-masked, parallel-group, active-controlled, noninferiority study. PARTICIPANTS: Patients 1 year of age or older with clinical manifestations of bacterial conjunctivitis. METHODS: Eligible patients were randomized to either besifloxacin suspension or moxifloxacin solution, instilled in the infected eye(s) 3 times daily for 5 days, and participated in study visits on days 1, 5 (+/-1 day), and 8 (+1 day). Assessments included clinical evaluation of signs and symptoms, visual acuity, biomicroscopy, and culture of the infected eye(s) at each visit, as well as direct ophthalmoscopy on days 1 and 8. MAIN OUTCOME MEASURES: The primary efficacy end points were clinical resolution and microbial eradication of baseline bacterial infection on day 5 in patients with culture-confirmed bacterial conjunctivitis. Secondary end points included clinical resolution and microbial eradication on day 8, individual clinical outcomes, microbial and clinical outcomes by bacterial species, and safety. RESULTS: A total of 1161 patients (533 with culture-confirmed bacterial conjunctivitis) were randomized. Based on the 95% confidence interval (CI) of the difference, besifloxacin was noninferior to moxifloxacin for clinical resolution on day 5 (58.3% vs. 59.4%, respectively; 95% CI, -9.48 to 7.29) and day 8 (84.5% vs. 84.0%, respectively, 95% CI, -5.6% to 6.75%) and for microbial eradication on day 5 (93.3% vs. 91.1%, respectively, 95% CI, -2.44 to 6.74) and day 8 (87.3% vs. 84.7%; 95% CI, -3.32 to 8.53). There was no statistically significant difference between the 2 treatment groups for either efficacy end points on days 5 or 8 (P>0.05). Besifloxacin and moxifloxacin were well tolerated. The cumulative frequency of ocular adverse events was similar between treatments (12% and 14% with besifloxacin and moxifloxacin, respectively). However, eye irritation occurred more often in moxifloxacin-treated eyes (0.3% for besifloxacin vs. 1.4% for moxifloxacin; P = 0.0201). CONCLUSIONS: Besifloxacin ophthalmic suspension was non inferior to moxifloxacin ophthalmic suspension and provided similar safety and efficacy (clinical and microbiological) outcomes when used for the treatment of bacterial conjunctivitis. FINANCIAL DISCLOSURE(S): Proprietary or commercial disclosure may be found after the references.
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