Phenylephrine Glucuronide is primarily used in research and clinical studies to understand the metabolism and excretion pathways of phenylephrine, a common decongestant. It serves as a key metabolite in pharmacokinetic studies, helping to analyze how the body processes and eliminates phenylephrine. This compound is also utilized in the development of analytical methods, such as liquid chromatography-mass spectrometry (LC-MS), to detect and quantify phenylephrine levels in biological samples. Additionally, it aids in assessing drug interactions and the safety profile of phenylephrine-containing medications.