Gamma IV is a brand of Normal Human immunoglobulin 5 % for Intravenouse use . It is a sterile solution containing 4.5 %-5.5 % of human protein in 9-11 % maltose to achieve isotonicity. It contains no preservatives . Each ml contains approximately 50 mg of protein. Also present are traces of lgA and lgM. The distribution of lgG subclasses is similar to that found in normal human serum.