No abstract

Moxifloxacin (MOX) is a fluoroquinolone anti-infective drug, indicated for the treatment of bacterial conjunctivitis. The drug is soluble in water but still produces low ocular bioavailability due to biological barriers and so it requires dosing for two/three times a day. The present study was designed to formulate, optimize and characterize polymeric Nanoparticles MOX for ocular administration using Ion Exchange Resin (IER). IER-nanoparticles were prepared by media milling method, formulation/process parameters were optimized based on evaluation parameters such as color of nanosuspension, sedimentation behaviour, particle size and zeta potential. MOX-IER nanosuspensions were prepared at different stoichiometric ratio of MOX and IER and characterized by entrapment efficiency, pH, particle size and zeta potential of nanosuspension. In vitro release study of optimized batch MNIER3 exhibited sustained release pattern which follows Korsmeyer-Peppas model with Fickian diffusion mechanism for drug release. Based on these results optimized batch of MOX-IER nanosuspension formulated in the laboratory was found suitable for ocular delivery. Keywords: Moxifloxacin; nanoparticles, nanosuspension; media milling; stoichiometric ratio; sedimentation behaviour.