Mycophenolic Acid(MPA) Determination Reagent(Homogeneous enzyme immunoassay) is an in vitro diagnostic quantitative test kit. Mycophenolic acid is a commonly used immunosuppressant in organ transplantation. Free mycophenolic acid has pharmacological activity, and its metabolism is affected by many factors, resulting in individual differences in blood drug concentration. The content of mycophenolic acid in human body is determined, and the dosage regimen is designed according to the individual characteristics and disease state of the patient, so as to provide a reference for achieving individualized administration, improving curative effect and reducing adverse reaction of the medicine clinically.