179FORMULATION AND EVALUATION OF NOVEL DRUG DELIVERY SYSTEM IN SUSTAINED RELEASE USING SYNTHETIC POLYMERS (EUDRAGIT) – AN UPDATED REVIEWThis Collection of updated review articles provides a comprehensive overview of the latest advancements in Eudrajit polymers, a widely used material in drug delivery systems. The review covers various aspects of Eudrajit polymers, including their properties, applications, and recent developments in formulation technologies. The collection includes discussions on: *Novel applications of Eudrajit polymers in drug delivery systems *Recent advancements in Eudrajit-based nanoparticles, microspheres, and films *Eudrajit polymers in combination with other materials for hybrid drug delivery systems *Updated information on the physiochemical properties and characterization of Eudrajit polymers. Eudrajit polymer S-100, L-100, RLPO and RS, have revolutionized drug delivery systems with their unique properties and versatility. This collection of updated review articles provides a comprehensive overview of the latest developments in Eudrajit-based drug delivery system. The reviews cover the properties and characterization of Eudrajit S-100 and L-100, including their solubility, permeability, and stability. Applications in oral drug delivery, such as Tablets, capsules, and Powders, are discussed, along with their use in topical and transdermal drug delivery systems. Injectable formulations and implantable device using Eudrajit polymers are also explored. Recent advancements in formulation technologies, including nanoparticles and microparticles, are highlighted, as well as the comparison of Eudrajit S-100 and L-100 with other Eudrajit grades. The collection also discusses future directions and emerging trends in Eudrajit-based drug delivery systems. This comprehensive collection serves as a valuable resource for researchers, scientist, and professionals in the pharmaceutical industry, providing insights into the latest developments and application of Eudrajit S-100 and L-100.By exploring the potential of these polymers, this collection aims to advance the field of drug delivery and improve patient outcomes.csaravananpharma@gmail.comResearch1512025Drug Delivery Systems, Sustained release, Polymer properties, nanoparticles, microparticlesSaravanan C*, Anithalakshmi B, Arulkumar R, Arun R, Atchaya P, Balaji AAadhibhagawan College of Pharmacy, Rantham, Vembakkam, Thiruvannamalai-604407, Tamilnadu, India