Mycophenolic acid sodium is a potent uncompetitive inhibitor of inosine monophosphate dehydrogenase (IMPDH), exhibiting an EC50 of 0.24 μM. It has broad antiviral activity against RNA viruses, including influenza. Additionally, mycophenolic acid sodium possesses immunosuppressive properties and exerts antiangiogenic and antitumor effects [1][2].