Insomnia

Kava has been shown to help those with insomnia get a good night's rest.  The Psychopharmacology Research Group in London published a study in Sept. 2001 that showed significant relief of stress-induced insomnia.
Another paper by the Dept. of Psychiatry at LMU Munich, Germany, describes how "kava pyrones have additive effects with the serotonin-1A agonist ipsapirone probably contributing to their anxiolytic and sleep- inducing effects".

See the following links regarding Insomnia:

Insomnia, Melatonin, Kava Root Extract & Delta rhythm Sleep

Insomnia and Menopause

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