Psychopharmacology

, Volume 112, Issue 2–3, pp 359–365

Caffeine reversal of sleep deprivation effects on alertness and mood

  • David Penetar
  • Una McCann
  • David Thorne
  • Gary Kamimori
  • Cynthia Galinski
  • Helen Sing
  • Maria Thomas
  • Gregory Belenky
Original Investigations

DOI: 10.1007/BF02244933

Cite this article as:
Penetar, D., McCann, U., Thorne, D. et al. Psychopharmacology (1993) 112: 359. doi:10.1007/BF02244933

Abstract

This study assessed the ability of high doses of caffeine to reverse changes in alertness and mood produced by prolonged sleep deprivation. Fifty healthy, nonsmoking males between the ages of 18 and 32 served as volunteers. Following 49 h without sleep, caffeine (0, 150, 300, or 600 mg/70 kg, PO) was administered in a double-blind fashion. Measures of alertness were obtained with sleep onset tests, the Stanford Sleepiness Scale (SSS), and Visual Analog Scales (VAS). Sleep deprivation decreased onset to sleep from a rested average of 19.9 min to 7 min. Following the highest dose of caffeine tested, sleep onset averaged just over 10 min; sleep onset for the placebo group averaged 5 min. Scores on the SSS increased from a rested mean of 1.6–4.8 after sleep deprivation. Caffeine reduced this score to near rested values. Caffeine reversed sleep deprivation-induced changes in three subscales of the POMS (vigor, fatigue, and confusion) and produced values close to fully rested conditions on several VAS. Serum caffeine concentrations peaked 90 min after ingestion and remained elevated for 12 h. This study showed that caffeine was able to produce significant alerting and long-lasting beneficial mood effects in individuals deprived of sleep for 48 h.

Key words

Humans Caffeine Stimulant Sleep deprivation Profile of Mood States Visual Analog Scales Serm concentration 

Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • David Penetar
    • 1
  • Una McCann
    • 1
  • David Thorne
    • 1
  • Gary Kamimori
    • 1
  • Cynthia Galinski
    • 1
  • Helen Sing
    • 1
  • Maria Thomas
    • 1
  • Gregory Belenky
    • 1
  1. 1.Department of Behavioral BiologyWalter Reed Army Institute of ResearchWashington, DCUSA
  2. 2.US Army Medical Research and Development CommandFrederickUSA

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