Cited by 226Coffee research and impactsSleep and related disordersSleep and Work-Related Fatigue

Dose-related sleep disturbances induced by coffee and caffeine

Karacan, Ismet, Thornby, John I., Anch, A. Michael, Booth, Glenn H., Williams, Robert L., Salis, Patricia J.·1976·Clinical Pharmacology & Therapeutics

Abstract

In a 13-night sleep laboratory study, each of 18 normal young adult males twice received 1 cup of warm water, 1-, 2-, and 4-cup equivalents of regular coffee, a 4-cup equivalent of decaffeinated coffee, and a 4-cup equivalent of caffeine. All beverages were administered 30 min before bedtime according to a balanced Latin-square design. Regular coffee produced dose-related changes in most standard electroencephalogram-electrooculogram (EEG-EOG) sleep parameters, and the 4-cup equivalents of regular coffee and caffeine produced equivalent effects. Decaffeinated coffee had no effect. Regular coffee and caffeine caused rapid eye movement (REM) sleep to shift to the early part of the night and stages 3 and 4 sleep to shift to the later part. Coffee also produced dose-related changes in several subjects estimates of sleep characteristics. These results suggest that coffee and caffeine may be used in normal subjects to induce symptoms mimicking those of insomnia. Such a tool should promote further understanding of insomnia.

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Registry

Crossref · 10.1002/cpt1976206682

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  • Three high-risk studies did not implement a washout period, with conditions administered across consecutive nights.

    “and three of these studies [26,43,53] did not implement a washout period with conditions administered across consecutive nights.”
  • Of the five studies investigating the dose-response relationship, four reported heightened perceptions of sleep disruption with larger caffeine doses.

    “Of the fi ve studies [25,26,31,35,37] investigating the dose-response relationship, four [25,26,31,35] reported heightened perceptions of sleep disruption with larger caffeine doses.”

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Authors
Karacan, I., Thornby, J. I., Anch, A. M., Booth, G. H., Williams, R. L., & Salis, P. J.
Affiliations
Baylor College of Medicine (US)
Venue
Clinical Pharmacology & Therapeutics
Publisher
Wiley
Published
1976-12
Volume
20
Issue
6
Pages
682-689
ISSN
  • 0009-9236 (ISSN-L)
  • 1532-6535
OpenAlex
W2419532383
Cited by
226
References
10
Citations by year
2026: 3 · 2025: 6 · 2024: 4 · 2023: 10 · 2022: 8 · 2021: 4 · 2020: 3 · 2019: 2 · 2018: 6 · 2017: 4 · 2016: 4 · 2015: 10 · 2014: 7 · 2013: 4 · 2012: 8
FWCI
2.86
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Pharmacology & Therapeutics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Coffee research and impacts
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
coffee, caffeine, sleep disorders, insomnia, dose-response relationship, REM sleep, sleep stage distribution, decaffeinated coffee
MeSH terms
Adult, Caffeine, Clinical Trials as Topic, Coffee, Dose-Response Relationship, Drug, Electroencephalography, Electrooculography, Humans, Male, Sleep, Sleep Stages, Sleep, REM, Time Factors

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