PEG4000 can be utilized as a pharmaceutical excipient, such as in ointment bases and lubricants. Pharmaceutical excipients, also known as auxiliary agents, are chemical substances used in the manufacturing of pharmaceuticals that are not the active drug components. They generally refer to inactive ingredients in drug formulations that enhance stability, solubility, and processability. Furthermore, excipients can affect the absorption, distribution, metabolism, and elimination (ADME) of co-administered drugs.