2. Duration of Therapy

Immune globulins, when used to manage primary immunodeficiency, may be continued indefinitely as primary immunodeficiency is a chronic, lifelong disease ^{1,2,4-9,11-16}. Patients diagnosed with idiopathic thrombocytopenic purpura, an autoimmune disorder characterized by platelet destruction, may require immune globulin therapy to increase platelet counts. Immune globulin therapy is typically required for only 24-48 hours to stabilize platelet counts, but patients may require repeat courses of immune globulin therapy as ITP can be a chronic, lifelong condition^{1,2,5,7,8,10,11}. Cytomegalovirus immune globulin (Cytogam®) is administered at an every 2 or 4-week dosing interval through week 16 following organ transplant^1-3.