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Definition of Immunosuppressant

Immunosuppressant: An agent that can suppress or prevent the immune response. Immunosuppressants are used to prevent rejection of a transplanted organ and to treat autoimmune diseases such as psoriasis, rheumatoid arthritis, and Crohn's disease. Some treatments for cancer act as immunosuppressants.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 9/20/2012

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