How to Say It: Im-mu-no-glob-u-lin
Immunoglobulin therapy (IgG) is the use of donated immunoglobulins from a healthy person. These are special proteins in the blood that fight infection. They are also known as antibodies.
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IgG is used to treat problems with the immune system. This can be from:
IgG can also lower inflammation in the body. This makes the immune system work better.
Problems are rare, but all procedures have some risk. The doctor will go over some problems that could happen, such as:
The care team may meet with you to talk about:
An IV needle will be placed into a vein in the arm. A small tube is left in the arm when the needle is removed. This lets the fluid drain into the vein. The solution is in a bag. It hangs above and next to you.
About 5 to 6 hours
Most people do not have lasting pain.
Right after the procedure, the staff may:
Most people start to feel better 1 to 2 days after the IgG. Some people may not feel better for 3 to 4 weeks.
Call your doctor if you are not feeling better or you have:
If you think you have an emergency, call for medical help right away.
American Autoimmune Related Diseases Association
National Institute of Allergy and Infectious Diseases
Canadian AIDS Society
Hoernes M, Seger R, et al. Modern management of primary B-cell immunodeficiencies. Pediatr Allergy Immunol. 2011 Dec;22(8):758-769.
IgG deficiency. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/igg-deficiency. Accessed December 9, 2020.
Immunoglobulin (IgG) replacement therapy. American Academy of Allergy, Asthma & Immunology website. Available at: https://www.aaaai.org/conditions-and-treatments/conditions-dictionary/immunoglobulin-(IgG)-replacement-therapy. Accessed December 9, 2020.
Immunoglobulin therapy & other medical therapies for antibody deficiencies. Immune Deficiency Foundation website. Available at: https://primaryimmune.org/treatment-information/immunoglobulin-therapy. Accessed December 9, 2020.
Last reviewed September 2020 by
EBSCO Medical Review Board
Marcin Chwistek, MD
Last Updated: 4/21/2021