GAMMAGARD LIQUID SubQ infusions are delivered under your skin through 1 or more (maximum of 8 simultaneous sites) needles inserted in the upper arms, abdomen, thighs, or lower back. The number of sites depends on your dose. Immune globulin (IG) treatment is absorbed into your bloodstream through the tissues beneath your skin. SubQ administration may be administered by yourself or by a caregiver at home, at a frequency of once a week. Before you start infusing at home, a nurse will train you or your caregiver to make sure you know what you're doing and feel comfortable doing it.In the clinical study of SubQ administration of GAMMAGARD LIQUID SubQ, weekly infusion times ranged from 0.8 to 2.3 hours (the median time was 1.2 hours).GAMMAGARD LIQUID SubQ is used to treat primary immunodeficiency (PI) in people 2 years and older. Your doctor will determine the right dose based on your body weight and IG levels