Immunosuppressive drugs, also known as immunosuppressive agents, immunosuppressants and antirejection medications are drugs that inhibit or prevent activity of the immune system.
Classification
Immunosuppressive drugs can be classified into five groups:
glucocorticoids
cytostatics
antibodies
drugs acting on immunophilins
other drugs
Glucocorticoids
In pharmacologic (supraphysiologic) doses, glucocorticoids, such as prednisone, dexamethasone, and hydrocortisone are used to suppress various allergic, inflammatory, and autoimmune disorders. [Source: Wikipedia 
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