Azathioprine is an immunosuppressive medication. It is used in rheumatoid arthritis, granulomatosis with polyangiitis, Crohn's disease, ulcerative colitis, systemic lupus erythematosus and in kidney transplants to prevent rejection. 

Mycophenolate Mofetil (CellCept) and Mycophenolate Sodium (Myfortic) are immunosuppressant drugs (a class of drugs that reduce the strength of the body's immune system) used in the treatment of several autoimmune diseases.

Mycophenolate mofetil, also known as MMF or CellCept, is a prodrug of mycophenolic acid and classified as a reversible inhibitor of inosine monophosphate dehydrogenase (IMPDH). This drug is an immunosuppressant combined with drugs such as Cyclosporine and corticosteroids to prevent organ rejection after hepatic, renal and cardiac transplants.