Tear concentrations of levofloxacin following topical administration of a single dose of 0.5% levofloxacin ophthalmic solution in healthy volunteers.

Background: Several fluorinated carboxyquinolones are used to treat ocular infectious disease. Levofloxacin, in particular, has demonstrated activity against both gram-negative and gram-positive bacteria.

Objectives: An open-label study was undertaken to assess the pharmacokinetics and ocular bioavailability of levofloxacin in human tears, and to determine the tear concentration of levofloxacin in healthy volunteers, following topical administration of a single-dose of 0.