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Abstract

FORMULATION DEVELOPMENT AND EVALUATION OF IN SITU GEL OF LEVOFLOXACIN AND DEXAMETHASONE

Parveen Shama*1, Vidhi Jain1, Jagdish Chandra Nagar2, Usha Pankaj1, Neeraj Jindal1

1Department of Pharmaceutics, Kota College of Pharmacy, Kota, Rajasthan.

2Department of Pharmacognocy, Kota College of Pharmacy, Kota, Rajasthan.

ABSTRACT

Poor bioavailability (<10%) of drugs from conventional eye drops is mainly due to the various precorneal loss factors which include rapid tear turnover, systemic drug absorption through naso-lachrymal duct, transient residence time of the drug solution in the cul-de-sac and the relative impermeability of the drugs to corneal epithelial membrane. In situ gels are systems which are applied as solutions or suspensions and are capable of undergoing rapid sol-to-gel transformation triggered by external stimulus such as temperature, pH etc on instillation. The purpose of the present research work was to develop and evaluation sustains release in situ ophthalmic gel of dexamethasone (DXM) and levofloxacin (LEV). The different gelling solutions were made with Pluronic F127 in combination with different polymers such as Carbopol 934 and HPMC, which acted as a viscosity‐enhancing agent. Suitable concentrations of buffering agent were used for pH adjustment. All the formulations were sterilized in an autoclave at 121°C for 15 minutes. The formulations were evaluated for clarity, pH measurement, gelling capacity, drug content, rheological study, sterility testing, in vitro drug release study, ocular irritation study and stability study. The developed formulations exhibited sustained release of drug from formulation over a period of 7 hours. The prepared formulations were tested for eye irritation on albino rabbit (male). The results demonstrated that the developed in situ gel of DXM and LEV is nonirritant, has prolonged action and is a better option in terms of retention, ocular bioavailability and patient compliance when compared with plain eye drops formulation.

Keywords: Dexamethasone, Levofloxacin, In situ gel, In vitro drug release, Rheological study.


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