ICU sedation, delirium & recovery

Efficacy of Ramelteon, Suvorexant, and Lemborexant for Delirium Prevention in Hospitalized Patients: A Systematic Review and Meta-Analysis

Crit Care MedPublished Systematic review and meta-analysis of randomised and observational studies

Authors' conclusion

Sleep-wake regulating pharmacologic agents were associated with 40%-46% relative risk reductions in delirium prevalence, based on low-certainty evidence.

Study context

Population
Hospitalized adults
Participants
4,489 adults · 24 studies
Comparison
Suvorexant, lemborexant or ramelteon vs control
  • Sleep-wake regulating agentsn = 1,752
Outcome
Delirium prevalence
Methodological detailsrandom-effects meta-analysis, GRADE certainty assessment
  • Random-effects meta-analysis
  • GRADE certainty assessment

Pooled result

As reported in the abstract

Randomized trials: RR

0.60

95% CI 0.38–0.97; low certainty

Observational studies: RR

0.54

95% CI 0.43–0.68; low certainty

Further pooled results

Delirium prevalence by individual agent (subgroup)

No credible subgroup effects by individual agent
  • Interaction p > 0.1
  • Exploratory analyses

Ventilator days, mortality, hospital or ICU LOS

No significant effects
  • Very low certainty

Original publication

Efficacy of Ramelteon, Suvorexant, and Lemborexant for Delirium Prevention in Hospitalized Patients: A Systematic Review and Meta-Analysis. Crit Care Med. Published 13 June 2025. doi:10.1097/ccm.0000000000006737

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