Widely used in pharmaceutical formulations as a solubilizing and stabilizing agent, especially for poorly water-soluble drugs. Enhances bioavailability by forming micelles that encapsulate hydrophobic compounds, improving their dispersion in aqueous environments. Commonly employed in injectable and oral dosage forms, including anticancer and antiviral medications. Also acts as an antioxidant, protecting active ingredients from oxidative degradation. Its biocompatible and non-ionic nature makes it suitable for use in sensitive therapeutic applications. Frequently found in drug delivery systems such as micellar carriers and nanomedicines.