IVIG Administration Guidelines

Standard Dosing Regimens

The American College of Physicians recommends a total dose of 2 g/kg administered either as a single infusion or divided over 2 consecutive days for IVIG treatment 1

For Immune Thrombocytopenic Purpura (ITP), the initial dose is 1 g/kg as a one-time infusion, which may be repeated if necessary 2
The American Society of Hematology suggests an alternative regimen of 0.4 g/kg/day for 5 days for ITP, achieving faster platelet response within 24 hours 3, 4
For Kawasaki Disease, a single infusion of 2 g/kg is the standard regimen 1
For Guillain-Barré Syndrome, 0.4 g/kg/day for 5 consecutive days is recommended, requiring inpatient monitoring with ICU capability for severe cases 5, 6
For Myasthenia Gravis and Immune Checkpoint Inhibitor-Related Neurologic Toxicity, 2 g/kg IV over 5 days is used for Grade 3-4 toxicity with permanent discontinuation of checkpoint inhibitor 5, 6
For Idiopathic Inflammatory Myopathies, 1-2 g/kg over 2 consecutive days is recommended 1
For Immunodeficiency Replacement Therapy, the initial dose is 300-400 mg/kg IV monthly, with possible increases to 0.3 g/kg every 2-3 weeks if needed 1
For Common Variable Immunodeficiency (CVID), 0.3-0.4 g/kg every 3-4 weeks is recommended after initial high-dose treatment 3, 4
For Multisystem Inflammatory Syndrome in Children (MIS-C), 2 g/kg based on ideal body weight is recommended 1

The American Academy of Allergy, Asthma, and Immunology recommends checking serum IgA level before first IVIG administration to identify patients at risk for severe anaphylaxis 1
IgA-depleted IVIG preparations should be used if deficiency is detected 1
Renal function, including serum creatinine and urine output, should be evaluated before administration 1
Thrombotic risk factors should be assessed before administration 1
Cardiac function should be reviewed, especially in patients with cardiac dysfunction or fluid overload risk 1
History of previous infusion reactions should be documented 1

Diphenhydramine and acetaminophen are recommended as standard premedication 1
Corticosteroids, such as 20 mg prednisone, may be considered for patients with a history of infusion reactions 1, 3

For obese patients, ideal body weight or adjusted body weight should be used instead of actual body weight to prevent excessive dosing 1
For patients with cardiac dysfunction, the total dose should be divided over 2 days to minimize fluid overload 1

Renal function, including urine output and serum creatinine, should be monitored during infusion 1
Infusion should be administered over several hours to reduce toxicity 3, 4

Frequent adverse effects include headaches, fever, chills, fatigue, nausea, diarrhea, blood pressure changes, and tachycardia 3, 4
Rare but serious adverse effects include renal failure, thrombosis, aseptic meningitis, and anaphylaxis 3, 4, 1

Plasmapheresis should not be performed immediately after IVIG administration, as it will remove the immunoglobulin 5, 6
For ITP, many patients respond within 24 hours, typically 2-4 days, with a duration of response usually transient, returning to baseline 2-4 weeks after treatment 3, 4

In patients who develop a moderate infusion‑related reaction that does not resolve spontaneously within 15 minutes, an intravenous corticosteroid (e.g., hydrocortisone 100–500 mg IV) should be administered in addition to symptomatic treatment such as analgesics, NSAIDs, and additional antihistamines. 7

After symptom resolution, the infusion line should be kept patent with normal saline and the patient observed for a minimum of 15 minutes before any attempt to restart the IVIG infusion. 7