Studies related to Wakefulness and Caffeine

Subjective, Behavioral, And Physiological Effects Of Acute Caffeine In Light, Nondependent Caffeine Users

Effect Increase
Trial Design Double blind
Trial Length 24 hours
Number of Subjects 102
Sex Both Genders
Age Range 18-29, 30-44, 45-64
Body Types Overweight, Average
Notes for this study:
102 light, nondependent caffeine users were subject to varying doses of caffeine and tested for its psychostimulatory responses.

Sedation was significantly lowered and stimulation was higher, although still lesser to 20mg d-amphetamine (used as comparison) even when at 450mg caffeine. No significant interactions on euphoria or desire of 'more drug' were noted with caffeine, but were with d-amphetamine.

Performance on working memory was decreased at the 450mg dosage but processing speed at all doses was increased, most significantly at the 450mg dosage.

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