Development of a High-Retention Ocular Gel for Prolonged Intraocular Pressure Control using Timolol Maleate

The objective of this study was to develop and evaluate a sustained-release gel system for Timolol Maleate to overcome the limitations of conventional eye drops, such as rapid nasolacrimal drainage and poor ocular bioavailability in the management of glaucoma. Formulations were prepared using various concentrations of mucoadhesive polymers and evaluated for critical parameters including clarity, pH, drug content, and rheological behavior. The gels exhibited a physiological pH and pseudoplastic flow, ensuring both ocular compatibility and ease of administration. In-vitro release studies in simulated tear fluid (pH 7.4) demonstrated that the optimized formulation provided a controlled drug delivery profile over a period of several hours, significantly extending the residence time compared to standard aqueous solutions. Kinetic modeling indicated that the drug release followed a diffusion-controlled mechanism, suggesting that this gel system could successfully reduce dosing frequency, minimize systemic side effects, and improve patient compliance in the long-term treatment of intraocular hypertension. Keywords: Timolol Maleate, Glaucoma, Ocular Drug Delivery, Sustained Release