A Review on in Situ Gelling System for Ophthalmic Drug Delivery

Abstract

Ophthalmic drug delivery systems are both fascinating and problematic due to the normal physiological properties of the eyes, which restrict ocular product bioavailability. The development of novel ocular dosage forms for current drugs in order to enhance efficacy and bioavailability, as well as patient compliance and convenience, has become a major focus in the pharmaceutical business. Ocular In-situ gelling systems are a novel type of eye drug delivery systems that begin as a solution but rapidly convert into a thick gel when implanted or inserted into an ocular cavity where active pharmaceuticals are continually delivered. This sol-to-gel phase conversion is influenced by a range of variables, including variations in pH, the presence of ions, and temperature fluctuations. Post-transplantation gel is chosen for its viscosity and bio adhesive qualities, which prolongs the gel's presence in the ocular area and also ensures that the medicine is released slowly and continuously, in contrast to typical eye drops and ointments. This article provides an overview of situ gels, their numerous techniques of gelling, the many types of polymers utilized in situ gels, their gel-based methodologies, and the polymeric testing of situ gels. KEYWORDS: Ophthalmic, In situ gel, bioavailability, polymers, novel, sol-to-gel phase