PEG1500 serves as an ointment base and lubricant, functioning as a pharmaceutical excipient. Pharmaceutical excipients or adjuvants are defined as chemical substances used in the drug formulation process apart from the active pharmaceutical ingredients. These excipients typically are inactive components that enhance the stability, solubility, and processing of drug formulations. Additionally, pharmaceutical excipients can impact the absorption, distribution, metabolism, and excretion (ADME) processes when drugs are administered together.