How does IVIG treatment work for myasthenia gravis?
IVIG (intravenous immunoglobulin) is a concentrated injection of healthy antibodies collected from thousands of donors. It's given directly into your vein through an IV infusion, usually over several hours.
The exact mechanism isn't fully understood, but one theory Show Full Answer
How does IVIG treatment work for myasthenia gravis?
IVIG (intravenous immunoglobulin) is a concentrated injection of healthy antibodies collected from thousands of donors. It's given directly into your vein through an IV infusion, usually over several hours.
The exact mechanism isn't fully understood, but one theory suggests that IVIG helps signal your body to clear out excess antibodies—including the harmful autoantibodies attacking your nerve-muscle connections in MG. This can temporarily improve how your nerves communicate with your muscles.
IVIG is typically used as a short-term treatment during flares or myasthenic crises, lasting 2-5 days. It may take a few weeks before you notice symptom relief.
When is IVIG used?
Your doctor may recommend IVIG if you're experiencing:
* Worsening MG symptoms or a flare
* A myasthenic crisis (a serious, rapid worsening of symptoms)
* Preparing for surgery
* Other treatments aren't working effectively
Common side effects include:
* Headaches
* Fever and chills
* Nausea
* Fatigue
* Joint or back pain
If side effects occur during infusion, the treatment can be slowed or stopped. Healthcare providers monitor you closely and can provide medications to ease discomfort.
Rare but serious risks include:
* Allergic reactions
* Kidney or liver problems
* Blood clots
* Stroke or heart attack
IVIG can reduce vaccine effectiveness, so wait at least six weeks before getting vaccinated. Your doctor can help determine the best timing.
December 7, 2025
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