Abstract
Background: Insomnia, defined as a difficulty in initiating or maintaining sleep, is a relevant
medical issue. Benzodiazepines (BZDs) are commonly prescribed to treat insomnia. Two
phases characterize human sleep structure: sleep with Non-Rapid Eye Movement (NREM) and
sleep with Rapid Eye Movement (REM). Physiological sleep includes NREM and REM phases in
a continuous cycle known as “Sleep Architecture.”
Objective: This systematic review summarizes the studies that have investigated effects of BZDs
on Sleep Architecture.
Methods: The articles selection included human clinical trials (in English, Portuguese, or Spanish)
only, specifically focused on BZDs effects on sleep architecture. PubMed, BVS, and Google Scholar
databases were searched.
Results: Findings on BZDs effects on sleep architecture confirm an increase in stage 2 of NREM
sleep and a decrease in time of stages 3 and 4 of NREM sleep with a reduction in time of REM
sleep during the nocturnal sleep.
Conclusion: Variations in NREM and REM sleep may lead to deficits in concentration and working
memory and weight gain. The increase in stage 2 of NREM sleep may lead to a subjective improvement
of sleep quality with no awakenings. BZDz should be prescribed with zeal and professional
judgment. These patients should be closely monitored for possible long-term side effects.
Keywords:
Benzodiazepines, sleep, sleep architecture, sleep slow-wave, sleep REM, sleep stages.
Graphical Abstract
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