Impact of SSRI Therapy on Risk of Conversion From Mild Cognitive Impairment to Alzheimer's Dementia in Individuals With Previous Depression. Am J Psychiatry
November 28, 2017

Abstract

OBJECTIVE:
Depression is associated with an increased risk of Alzheimer's disease. Research has shown that the selective serotonin reuptake inhibitor (SSRI) citalopram decreases amyloid-β generation and plaque load. The authors evaluated the impact of SSRI treatment on CSF biomarkers and progression from mild cognitive impairment (MCI) to Alzheimer's dementia.

METHOD:
Data sets from 755 currently nondepressed participants from the longitudinal Alzheimer's Disease Neuroimaging Initiative were evaluated by Kaplan-Meier analysis and analyses of variance and covariance with ApoE4 status and age as covariates.

RESULTS:
In MCI patients with a history of depression, long-term SSRI treatment (>4 years) was significantly associated with a delayed progression to Alzheimer's dementia by approximately 3 years, compared with short-term SSRI treatment, treatment with other antidepressants, or no treatment and compared with MCI patients without a history of depression. No differences in CSF biomarker levels were observed between treatment groups.

CONCLUSIONS:
Long-term SSRI treatment may delay progression from MCI [mild cognitive impairment] to Alzheimer's dementia.