AzaSite (azithromycin ophthalmic solution) is a 1% sterile aqueous topical ophthalmic solution of azithromycin formulated in DuraSite® (polycarbophil, edetate disodium, sodium chloride). AzaSite (azithromycin ophthalmic solution) is an off-white, viscous liquid with an osmolality of approximately 290 mOsm/kg.