Could an immune treatment ease long COVID brain fog?
NCT ID NCT05350774
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests whether a treatment called IVIG (intravenous immunoglobulin) can help with ongoing neurological symptoms after COVID-19, like dizziness, trouble walking, or memory problems. About 45 adults who had COVID-19 at least 12 weeks ago will receive either IVIG or a placebo (saline) for 5 days, then switch to the other. Researchers will check if symptoms improve after two weeks.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
IV immunoglobulin (IVIG)
What this could lead to
If it works, this could point toward a treatment for neurological Long COVID symptoms, such as dizziness and memory problems.
What could go wrong
This is a small, early-stage trial with only 45 participants, so results may not apply to everyone. IVIG can cause side effects like headache or allergic reactions.
Disclaimer
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This is a summary of
the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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National Institutes of Health Clinical Center
Bethesda, Maryland, 20892, United States