Document Type : Original Article

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Department of Medical Biochemistry, Faculty of Basic Medical Sciences, Cross-River State University of Technology, Calabar, Nigeria

Received: 26 March 2017                        Accepted: 05 May 2017                          Published: 01 June 2017

 10.22034/MBT.2017.60381                                                                   XML Files


The purpose of the present research was to formulate ocular inserts of norfloxacin along with bioadhesive polymers to sustain drug release and assess its antimicrobial potential against E. coli, in vitro. Ocular inserts of norfloxacin were prepared by film casting method using bioadhesive polymers HPMC/ SCMC/ sodium alginate/ chitosan/carbopol 934 and PVP K30 as film forming polymer. The formulated bioadhesive norfloxacin ocular inserts were screened for various pharmacotechnical parameters and in vitro drug release. The optimized formulation was subjected to HET CAM test and antimicrobial efficacy against E. coli. Of the screened formulations, maximum bioadhesive strength (36.5 ± 0.10 x 10-3 dynes/cm2) was observed for chitosan based ocular insert. Kinetic modeling of the in vitro drug release data revealed matrix based release was governed by both diffusion and swelling phenomena. Ocular insert consisting formulated with chitosan was found promising, as it showed acceptable pH, good bioadhesive strength, sustained drug release (98.33% at 6 h) and active against selected microorganism.