THERAPIES

IVIG and immune-mediated ataxia.

Donated antibodies can alter immune activity. Whether IVIG is appropriate depends on the cause of ataxia and the individual’s risks.

IVIG

Donated antibodies used to change an immune response.

Intravenous immunoglobulin—IVIG—is a purified mixture of IgG antibodies collected from screened donor plasma and given slowly through a vein.

For ataxia, IVIG is considered when evidence points to an immune-mediated cause. It is not a general treatment for inherited SCAs or other degenerative ataxias, and response varies by the underlying condition.

Donor antibodies

IgG is pooled from many screened plasma donors, purified, and tested.

Slow infusion

A nurse gives IVIG through a vein while watching for reactions.

Immune modulation

Multiple actions can reduce or redirect harmful antibody and inflammatory activity.

Track response

Clinicians compare function, symptoms, examination findings, and adverse effects over time.

WHAT TO EXPECT

Before and during treatment

Review kidney function, clotting risks, medicines, hydration, and prior reactions.
The dose, schedule, product, and infusion rate depend on the diagnosis and individual risks.
Headache, fatigue, dizziness, nausea, and infusion-site discomfort are among the more common effects.

GET URGENT HELP

Serious reactions are uncommon—but possible.

Seek prompt medical help for chest pain, trouble breathing, one-sided weakness, a painful or swollen limb, markedly reduced urination, sudden swelling or weight gain, severe headache with stiff neck, or signs of a severe allergic reaction.

How benefit is judged: The goal and trial period should be defined before treatment. Depending on the condition, clinicians may follow walking, falls, speech, swallowing, strength, examination findings, or a scale such as SARA. Stability can sometimes be meaningful in a progressive immune disorder.

MedlinePlus IVIG guide ↗