Can long-term sedative-hypnotic use and stopping it affect sleep and cognition?

Sedative-hypnotics can improve perceived sleep in the short term, but prolonged exposure and withdrawal may meaningfully affect sleep continuity and cognition—particularly relevant at age 77, when fragmented sleep and medication-related cognitive vulnerability are clinically consequential.

Sleep architecture and continuity

• Long-term benzodiazepine exposure has consistent polysomnographic effects: more light N2 sleep and less slow-wave N3/N4 sleep, with REM sleep often reduced. In older chronic benzodiazepine/benzodiazepine-receptor agonist users, studies also find greater arousal density, indicating more fragmented sleep.
• Zolpidem findings are less uniform. An uncontrolled 179-day study of 20 mg nightly in elderly psychiatric inpatients found changes in N1, N2, N3/N4, and REM sleep, whereas an eight-month placebo-controlled trial found improved continuity without sustained stage-specific changes.

Discontinuation and tapering

• Rebound insomnia after stopping sedative-hypnotics is well established, especially after abrupt cessation of short- or intermediate-acting drugs and with greater physiologic dependence. It may manifest as worsened sleep onset or maintenance soon after stopping.
• Transient fragmentation—more awakenings, shorter sleep, and worse sleep latency—can accompany withdrawal, particularly in shorter or higher-dose zolpidem studies. However, a 12-month placebo-controlled therapeutic-dose zolpidem trial found no worsening of sleep efficiency, latency, or wake after sleep onset after discontinuation.
• Gradual individualized reduction is preferable: guidance commonly uses approximately 25% dose reductions every two weeks, or 5–10% every 2–4 weeks for patients needing a slower approach, with pauses if insomnia becomes troublesome.

Cognitive relevance

• In five community cohorts totaling 5,946 participants, greater wake after sleep onset was associated with poorer global cognition; short sleep was linked specifically to worse attention and processing speed. Higher wakefulness after sleep onset and arousal index also correlate with lower working-memory accuracy.
• Longitudinal data further link more fragmented sleep with faster cognitive decline and higher incident Alzheimer disease risk.

Bottom line

• The claim is supported: chronic sedative-hypnotic exposure can alter sleep architecture, and abrupt discontinuation can provoke rebound insomnia and sometimes fragmented sleep. In older adults, disrupted continuity is credibly associated with poorer attention and memory, supporting cautious, gradual deprescribing rather than abrupt cessation.