The sedating activity of hops.
Article Type: Brief article
Subject: Hops (Health aspects)
Hops (Usage)
Stress (Psychology) (Prevention)
Pub Date: 12/22/2006
Publication: Name: Australian Journal of Medical Herbalism Publisher: National Herbalists Association of Australia Audience: Academic Format: Magazine/Journal Subject: Health Copyright: COPYRIGHT 2006 National Herbalists Association of Australia ISSN: 1033-8330
Issue: Date: Winter, 2006 Source Volume: 18 Source Issue: 4
Product: Product Code: 0139909 Hops NAICS Code: 111998 All Other Miscellaneous Crop Farming SIC Code: 0139 Field crops, except cash grains, not elsewhere classified
Geographic: Geographic Scope: Australia Geographic Code: 8AUST Australia
Accession Number: 174817369
Full Text: Schiller H, Forster A, Vonhoff C, Hegger M, Biller A, Winterhoff H. 2006. Sedating effects of Humulus lupulus L extracts. Phytomed 13:7;535-41. (JS)

Humulus lupulus (hops) has traditional and modern use in phytotherapy to promote sleep or to reduce stress and tension. Previous studies have demonstrated marked efficacy as a soporific agent, usually in combination with valerian (Valeriana off) and passionflower (Passiflora incarnata). This study attempted to confirm previously discovered sedative and anxiolytic activity observed in animal models in vivo.

Hops ethanolic and C[O.sub.2] extracts were given orally to rats which were tested for any changes in locomotor activity, ketamine induced sleeping time, body temperature and elevated plus maze tests. Hops extracts were found against control to reduce locomotor activity and increase ketamine induced sleeping time, this reflecting a sedative action.

Curiously hops was discovered to significantly reduce the body temperature of the rats at higher doses, reflecting a traditional understanding of hops being energetically 'cooling'. In the majority of tests the sedative activity of hops was dose dependant.

In contrast to the results depicting sedative activity, in the elevated plus maze test no anxiolytic action was discovered as demonstrated in the control group (diazepam), which spent more time and had more entries into the open arm of the maze. The constituents which were responsible for the sedative action of hops were discovered to be the [alpha]bitter acids, [beta]-bitter acids and hop oil.

Jerome Sarris

3 Widgee Place, Chapel Hill Qld 4069

Cara Barnes

20 Brendon Street, Tarragindi Qld 4121
Gale Copyright: Copyright 2006 Gale, Cengage Learning. All rights reserved.