Could a cold sore drug slow Alzheimer's? new trial hints at hope
NCT ID NCT04710030
First seen Dec 17, 2025 · Last updated Jun 05, 2026 · Updated 25 times
Summary
This study tested whether a common antiviral drug, valacyclovir, could slow memory decline in people with mild cognitive impairment (MCI) who also carry antibodies for herpes simplex virus. Fifty adults aged 50-95 took either the drug or a placebo for 52 weeks. The goal was to see if the drug could reduce brain changes linked to Alzheimer's disease and preserve thinking skills.
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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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Locations
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New York State Psychiatric Institute
New York, New York, 10032, United States
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