The first example is methotrexate. This drug is an immunosuppressant that inhibits dihydrofolate reductase. By doing this it inhibits the growth and proliferation of lymphocytes which are important cells involved in the autoimmune process. Another example is azathioprine (Imuran). This drug inhibits T-lymphocytes, a population of lymphiocytes that are important in the initiation of autoimmunity. […]

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