Poly(ethylene glycol) is widely used in pharmaceuticals as a solvent, plasticizer, and coating agent for tablets and capsules. It helps improve drug solubility and stability, making it essential in drug delivery systems. In the medical field, it serves as a base for ointments, creams, and suppositories due to its non-toxic and moisturizing properties. It is also utilized in bioconjugation to modify proteins and peptides, enhancing their therapeutic potential. In industrial applications, it acts as a lubricant, dispersant, and binder in various formulations. Additionally, it is employed in tissue engineering as a hydrogel scaffold for cell growth and regeneration. Its versatility extends to research, where it is used for cell fusion and as a precipitant in protein crystallization.