Gammaren 5gm Injection 100ml is a solution for infusion derived from human blood that contains antibodies which are the bodys natural defense against diseases It is used to restore normal levels of Immunoglobulin G IgG in the blood IgG is the main antibody found in the blood and helps control infections This medication is used in both adults and children who have low levels of antibodies either due to primary immunodeficiencies a condition where individuals are born with a lack of antibodies or secondary immunodeficiencies when patients lack antibodies as a result of severe infection or ineffective antimicrobial treatment It is also used to treat certain inflammatory disorders Gammaren 5gm Injection 100ml works by providing IgG antibodies against various bacterial and viral agents