Original Investigation

Low-Dose Lithium for Mild Cognitive Impairment

JAMA Neurology 10.1001/jamaneurol.2026.0072

March 02, 2026 at 11:00 AM EST

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Can low-dose lithium treatment delay cognitive decline in older adults with mild cognitive impairment?In this pilot randomized clinical trial of 80 participants, none of the 6 coprimary outcomes reached the prespecified significance threshold; for verbal memory, scores declined by 1.42 points annually in the placebo group vs 0.73 points in the lithium group, which did not meet the prespecified threshold for multiple comparisons. Exploratory analyses suggested possible larger effects among amyloid-positive participants.This pilot trial provides effect size estimates and methodological insights to inform adequately powered confirmatory trials of low-dose lithium in older adults with amyloid-positive mild cognitive impairment.

Corresponding Author: Ariel G. Gildengers, MD, Department of Psychiatry, University of Pittsburgh School of Medicine, 3811 O’Hara St, Pittsburgh, PA 15213 (ariel.gildengers@pitt.edu).

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