Gamaglobin 16.5% Injection is used to strengthen the body's natural immune system to lower the risk of infection in persons with weakened immune system. It is made from healthy human blood that has a high level of certain defensive substances (antibodies), which help fight infections. Gamaglobin 16.5% Injection - Human Normal Immunoglobulin (16.5% w/v) - Zydus - Vaccine - Pilcare Exporter from India to Singapore