FORMULATION DEVELOPMENT AND EVALUATION OF pH TRIGGERED IN SITU OPHTHALMIC GEL OF BESIFLOXACIN HYDROCHLORIDE
Abstract
The aim of the present work was to formulation and evaluation of pH Triggered in-situ Ophthalmic Gel of Besifloxacin Hydrochloride to overcome the drawbacks obtained by conventional eye drop. There are two independent variables were used i.e. Carbopol 934 and HPMC K100. Carbopol 934 were used as gelling agent and HPMC K100 were used as bioadhesive polymer. Besifloxacin Hydrochloride shows activity against a wide range of Gram-positive and negative ocular pathogens: examples are Corynebacterium pseudodiphtheriticum, Moraxella lacunata, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pneumoniae and Streptococcus salivarius. The in situ gelling system involves sol-to-gel transition in the cul-de-sac upon instillation to avoid pre corneal elimination. The formulations were prepared by 32 factorial design. The prepared formulations were evaluated for clarity, pH, viscosity, Bioadhesive strength of gel, gel strength gel, Drug Content, In-vitro Drug Release Study, Antibacterial Activity, Isotonicity Evaluation, HET-CAM Test and stability studies. The drug content was in the range of 97-99.57 %. Formulation F5 selected as optimized on the basis of evaluation. It shows highest drug release upto 8hrs. It shows good antibiotic activity against Staphylococcus aureus. The optimized formulation was isotonic with blood cells. It passes sterility test. The optimized formulation passes the ocular irritancy test i.e. HET-CAM Test. The formulation kept for the stability study for 3 months. Short term stability study indicates that room temperature 400±20 was appropriate storage condition for formulations.
Keywords: pH Triggered, bioadhesive polymer, Carbopol 934, HPMC K100, HET-CAM Test, Antibacterial Activity.
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References
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