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The effects of caffeine on plasma MHPG, subjective anxiety, autonomic symptoms and blood pressure in healthy humans

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92 Scopus citations

Abstract

The effects of oral administration of caffeine (10 mg/kg) on plasma free 3-methoxy-4-hydroxyphenylethyleneglycol (MHPG) levels, behavioral ratings, blood pressure, and autonomic symptoms was determined in eleven healthy subjects. Caffeine produced robust increases in subject rated anxiety and nervousness and small elevations in blood pressure and a decrease in heart rate. Caffeine did not alter plasma MHPG in a consistent fashion and there was no correlation between changes in plasma MHPG and changes in anxiety or other ratings. Caffeine may produce symptoms of anxiety-nervousness without increasing central norepinephrine turnover.

Original languageEnglish
Pages (from-to)135-144
Number of pages10
JournalLife Sciences
Volume35
Issue number2
DOIs
StatePublished - 9 Jul 1984
Externally publishedYes

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