Enhanced cognitive performance and cheerful mood by standardized extracts of Piper methysticum (K...

14 Jun 2004Thompson R, Ruch W, Hasenöhrl RU.

The intake of a single dose of Kava extract (300 mg; p.o.) led to an increase in state cheerfulness, while the phytopharmacon did not influence state seriousness and bad mood. The mood-elevating effects of Kava were most prominent in trait cheerful subjects, indicating that trait cheerfulness moderated the drug-induced increase in cheerful mood. Furthermore, Kava improved the accuracy and the speed of performing the partial report and the item recognition task, indicative of a beneficial effect of the phytopharmacon on visual attention and short-term memory retrieval, respectively. Thus, unlike conventional benzodiazepine-type anxiolytics, which tend to impair cognitive performance and to increase the occurrence of negative affective states, Kava is a potent anxiolytic agent, which, additionally, can facilitate cognitive functioning and can increase positive affectivity related to exhilaration.

Cohort Study
4 effects
20 subjects

Reported Outcomes

VariablesOutcomeEffectLatency

Kava Herb risk & protective factor
Kava
Herb

Reaction time Nervous outcome

Notable Increase

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Kava Herb risk & protective factor
Kava
Herb

Stress Brain outcome
Stress
Brain

Notable Decrease

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Kava Herb risk & protective factor
Kava
Herb

Cognitive Activity Brain outcome

Notable Increase

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Kava Herb risk & protective factor
Kava
Herb

Subjective well-being Brain outcome

Notable Increase

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