Association between psychotropic medication and sleep microstructure: evidence from large population studies

Area of Science:

• Gerontology
• Sleep Medicine
• Psychopharmacology

Background:

• Sleep disturbances are common in older adults.
• Psychotropic medications are frequently prescribed to this population.
• Understanding their impact on sleep architecture is crucial for optimizing treatment.

Purpose of the Study:

• To investigate the association between psychotropic medication use and detailed sleep microstructure.
• To examine differences in sleep patterns related to benzodiazepine and SSRI use in older men and women.

Main Methods:

• Analysis of overnight polysomnograms from two large cohorts: Study of Osteoporotic Fractures (SOF) and Osteoporotic Fractures in Men Sleep Study (MrOS).
• Comparison of sleep microstructure, including cyclic alternating pattern (CAP), between medication users (benzodiazepines, SSRIs) and non-users.
• Statistical analysis using Mann-Whitney U test and multivariable linear regression adjusted for confounders.

Main Results:

• In older men (MrOS), benzodiazepine use was associated with lower CAP rate and arousal index.
• SSRI use in older men showed no significant changes in sleep microstructure.
• In older women (SOF), SSRI use was linked to increased high-amplitude EEG activation phases and periodic limb movement index.

Conclusions:

• Psychotropic medications significantly impact sleep microstructure in older adults, with differential effects based on drug class and sex.
• Comprehensive sleep analysis, including CAP, is important for understanding medication effects.
• Findings may enhance knowledge of psychotropic drug-induced sleep-wake mechanism alterations.