Immunorel 5gm Solution for Infusion is a solution of liquid human serum, containing the antibodies of healthy adults. This is used to strengthen the body's natural defense system (immune system) to lower the risk of infection in persons with a weakened immune system. Immunorel 5gm Solution for Infusion is also used to increase the blood count (platelets) in persons with a certain blood disorder (idiopathic thrombocytopenic purpura-ITP).