Your body has a defense system that protects you against various bacteria, viruses, and other harmful pathogens. Normally, your body makes special kinds of proteins called antibodies that attack these pathogens to help keep you disease-free. But have you ever wondered what happens if your body doesn’t produce enough of these antibodies? Or what happens if your body makes faulty ones that attack your own tissues and organs?
IVIG (Intravenous Immunoglobulin) can help these situations. It is a therapy that strengthens your immune system against various autoimmune and inflammatory diseases. In this article, we’ll discuss everything you need to know about IVIG.
What Is IVIG?
IVIG (Intravenous Immunoglobulin) is a blood-based medicine derived from the plasma of thousands of healthy donors. IVIG is made up of antibodies, also known as immunoglobulins. These are special proteins that help your body fight off infections [1].
Sometimes our bodies are unable to produce enough antibodies, or worse, make faulty antibodies that attack our own tissues and organs. IVIG provides a wide range of normal antibodies from donors that support or regulate your immune system [2].
As IVIG is made from human plasma, it is purified to ensure it is effective and safe for our bodies. IVIG is given directly into your veins (intravenously). Depending on your condition, you may receive IVIG once every few weeks or as long-term treatment.
What Is IVIG Used for?
IVIG is used to treat various autoimmune and inflammatory diseases. Here are some of them:
Immune Deficiency Disorders: Some people are born with a weak immune system. For others, the immune system may become weak later in life due to the onset of disease. As a result, their body can’t produce enough antibodies to fight infections. IVIG helps by replacing missing antibodies. Some examples include [3,4]:
- Primary Immunodeficiency Diseases (PIDs)
- Chronic Lymphocytic Leukemia (CLL) with low antibodies
- HIV-related immune deficiency
Autoimmune Diseases: In autoimmune diseases, the immune system mistakenly attacks the body’s own tissues and organs. IVIG helps regulate and calm an overactive immune system [5]. Some common conditions where IVIG is helpful include:
- Guillain-Barré Syndrome (GBS)
- Myasthenia Gravis
- Systemic Lupus Erythematosus (SLE)
Neurological Disorders: Doctors widely use IVIG in conditions where the immune system attacks the nerves. Examples of such conditions include [6]:
- Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
- Multifocal Motor Neuropathy
Blood Disorders: IVIG is used in blood-related conditions like [7,8]:
- Immune Thrombocytopenic Purpura (ITP)
- Autoimmune Hemolytic Anemia
Infectious Diseases and Other Uses: In some cases, you may require IVIG for immediate protection against infections or inflammatory conditions. Here are some of those conditions [1,7]:
- Kawasaki Disease
- Severe infections in immunocompromised patients
How Does IVIG Work?
Your immune system is like a defense team that normally stays perfectly balanced. It is neither too weak nor too aggressive. But when this balance is lost, you face different autoimmune and inflammatory diseases as well as an overall increased risk of infection. When you have a shortage of antibodies or harmful ones that attack your own cells, IVIG can help you in several ways [1,2].
Firstly, IVIG can replace missing antibodies. If you have a weakened immune system, your body can’t produce enough antibodies to fight off infections. IVIG provides ready-made antibodies that can help you fight infections.
Secondly, it can modulate your immune system. In autoimmune diseases, the immune system mistakenly attacks its own healthy cells. IVIG helps “calm down” this overreaction and prevents unnecessary damage.
Thirdly, IVIG can reduce inflammation. It interrupts the interactions between immune cells and signaling pathways that promote inflammation, helping you with inflammatory diseases.
Finally, IVIG restores the immune balance. It helps your immune system function properly.
IVIG Side Effects
Like any other medication, IVIG can also have some side effects. Some of them are mild, while others can be severe. Here are some mild to severe side effects of IVIG [1]:
Mild Side Effects
The most common side effects of IVIG are mild. They include:
- Headache
- Fever
- Chills
- Fatigue
- Vomiting
- Muscle pain
These side effects usually go away on their own within a few days. However, you can take over-the-counter pain relievers for headaches and muscle pain. Slowing the infusion rate also helps with the headache and chills.
Severe Side Effects
Serious side effects from IVIG are rare, but they can happen. Here are some of them:
Severe Allergic Reactions: In rare cases, you may experience serious allergic reactions. Contact your doctor immediately if you have symptoms like difficulty breathing, chest pain, itching, rash, swelling, or a fast or irregular heartbeat.
Kidney Problems: IVIG may affect your kidneys. Symptoms include reduced urination; swelling in your legs, face, or ankles; fatigue; and nausea.
Blood Clots: IVIG can increase the risk of clot formation, which may lead to stroke or heart attack.
Aseptic Meningitis: This is a rare condition that causes severe headaches, neck stiffness, and sensitivity to light.
Hemolysis: IVIG can cause destruction of blood cells in some patients.
Please note that this is not a complete list of all possible side effects. Contact your doctor immediately if you encounter any severe side effects of IVIG.
IVIG Therapy Cost
IVIG is a very costly treatment because it is made from human plasma and requires a complex process to produce. A single treatment can cost between $1,000 and $10,000 [9]. However, the actual cost depends on several factors, including your dosage, location, treatment frequency, insurance coverage, and the pharmacy you visit.
Before Starting IVIG
To ensure that IVIG is safe and effective for you, consult your doctor about your medical history before starting IVIG therapy. Inform your doctor if you:
- Have or ever had an allergic reaction to immunoglobulin products
- Have kidney disease or diabetes
- Have a history of blood clots
- Are taking medications that affect kidney functions
- Are pregnant or planning to become pregnant
FAQs
Here are some frequently asked questions about IVIG:
1. How long does an IVIG infusion take?
IVIG infusion can take several hours to complete. It takes between 2 and 6 hours, depending on the dose and your tolerance.
2. How often is IVIG given?
The frequency of IVIG infusion depends on your condition. For chronic conditions like an immune deficiency or CIDP, most people receive IVIG infusion once a month. But for acute flares (like GBS or ITP), you may receive it as a one-time high dose or daily for up to 5 consecutive days.
3. Can I take IVIG at home?
Yes. In some cases, you can take IVIG at home. But it must be administered by trained healthcare professionals.
4. How quickly does IVIG work?
The response time depends on your condition. For issues like ITP, it may work within 24–48 hours. For neurological conditions like GBS, improvements can appear in a few days to a few weeks. However, for chronic autoimmune conditions like CIDP, it may take 2-4 weeks or longer to feel a significant difference.
References
- Arumugham, V. B., & Rayi, A. (2023, July 3). Intravenous immunoglobulin (IVIG). StatPearls – NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK554446/
- Wikipedia contributors. (2026, February 15). Immunoglobulin therapy. Wikipedia. https://en.wikipedia.org/wiki/Immunoglobulin_therapy
- Eight Guiding Principles for Effective use of IVIG for patients with primary Immunodeficiency. (n.d.). https://www.aaaai.org/Aaaai/media/Media-Library-PDFs/Practice%20Management/Practice%20Tools/IVIG-guiding-principles.pdf?utm_source=copilot.com
- Khan, S., Allsup, D., & Molica, S. (2023). An updated perspective on immunoglobulin replacement in chronic lymphocytic leukaemia in the era of targeted therapies. Frontiers in Oncology, 13, 1135812. https://doi.org/10.3389/fonc.2023.1135812
- Velikova, T., Sekulovski, M., Bogdanova, S., Vasilev, G., Peshevska-Sekulovska, M., Miteva, D., & Georgiev, T. (2023). Intravenous immunoglobulins as immunomodulators in autoimmune diseases and reproductive medicine. Antibodies, 12(1), 20. https://doi.org/10.3390/antib12010020
- Limited, T. P. C. (2025, June 4). Takeda’s GAMMAGARD LIQUID® Approved by U.S. FDA for Adults with Chronic Inflammatory Demyelinating Polyneuropathy (CIDP). Takeda Pharmaceutical Company Limited. https://www.takeda.com/newsroom/newsreleases/2024/takedas-gammagard-liquid-approved-for-adults-with-cidp-in-united-states/
- 18. Intravenous Immune globulin (IVIG) | Hospital handbook. (n.d.). https://hospitalhandbook.ucsf.edu/content/18-intravenous-immune-globulin-ivig
- PharmD, S. R. (2025, July 16). A Guide to IVIG Treatment for ITP. AmeriPharma® Specialty Care. https://ameripharmaspecialty.com/ivig/a-guide-to-ivig-treatment-for-itp/
- IV Therapy Catonsville MD, Jean Walter Infusion Center – Dr. Nasser Nasseri, MD. (2025, May 8). IVIG Therapy cost in Edgewater MD | Jean Walter Infusion. https://jeanwalterinfusion.com/ivig-therapy-cost