Bulk OEM Reagents (Reagent 1/ Reagent 2) for automated chemistry analyzers. Mycophenolic Acid is an immunosuppressant drug used to prevent organ rejection in transplantation patients. It requires therapeutic drug monitoring to determine its concentration in serum or plasma to ensure proper dosing. A narrow therapeutic index necessitates an accurate and reliable means for the measurement of mycophenolic acid concentration in human body fluid such as serum or plasma. Due to the narrow therapeutic index, the increasing number of mycophenolic acid intoxications and the large number of potential patients worldwide, a high throughput detection method with high sensitivity and specificity is presented. Mycophenolic Acid Assay provides a convenient and efficient method to monitor this drug concentration in serum or plasma.