There are several classes of immunosuppressive drugs: - Calcineurin Inhibitors: These drugs, such as cyclosporine and tacrolimus, inhibit the activity of calcineurin, a protein involved in T-cell activation. - Antiproliferative Agents: Drugs like azathioprine and mycophenolate mofetil suppress the proliferation of immune cells. - Corticosteroids: These drugs, such as prednisone, reduce inflammation and inhibit multiple aspects of the immune response. - Monoclonal Antibodies: Drugs like basiliximab and rituximab target specific immune cell receptors.