Roles of Polymeric Excipients in Modern Drug Formulation and Stability Enhancement

Abstract

Excipients play a pivotal role in the development of stable, efficacious, and patient-compliant drug formulations. Polymers, in particular, are extensively used to modulate drug release, enhance solubility, and improve shelf-life. This paper explores the classification, properties, and functional roles of polymeric excipients in both conventional and novel drug delivery systems. Various techniques for drug-polymer interactions, including solid dispersions, hydrogels, and polymeric nanoparticles, are discussed. Emphasis is placed on how excipient selection affects pharmacokinetics, stability, and overall formulation performance. Additionally, the challenges of polymer compatibility, regulatory requirements, and scale-up manufacturing are analyzed. Through comprehensive literature review and case study analysis, the paper demonstrates the importance of rational excipient selection for achieving optimized drug delivery.

KEYWORDS: Polymeric Excipients, Stability, Drug Release, Solid Dispersion, Formulation Optimization