The surface and bulk features of polymers make them ideal for use in medication delivery. They are being integrated into pharmaceutical products and medication delivery systems. These systems for administering drugs gradually might be implantable medical gadgets. Small particle colloidal drug carrier systems made from polymers have several benefits as drug delivery systems due to their optimized drug loading and releasing property. The purpose of this article is to examine the production of polymeric particles and learn more about polymer drug conjugation. Polymeric drug carriers and their drug loading are also discussed. The research shows that the optimized drug loading and releasing feature of polymers employed in colloidal drug carrier systems (which consist of microscopic particles) is a major benefit in drug delivery systems. Safeness, effectiveness, hydrophilicity, lack of immunogenicity biological inactivity, sufficient pharmacokinetics, and the presence of functional groups for covalent conjugation of drugs, targeting moieties, or formation of copolymer are some of the general characteristic features that make the polymer a potential candidate for drug delivery.