Catechin Gargling for Influenza Infection

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00239213
Recruitment Status : Completed
First Posted : October 14, 2005
Last Update Posted : October 31, 2006
Shizuoka General Hospital
Seirei Hamamatsu General Hospital
White Cross Nursing Home
Information provided by:
University of Shizuoka

Brief Summary:
The purpose of this study is to clarify the preventive effects of catechin gargling on the influenza infection.

Condition or disease Intervention/treatment Phase
Influenza Infection Drug: catechin extracts (health food) Not Applicable

Detailed Description:
In-vitro experimental studies have revealed that tea catechin extracts induce preventive effects on influenza infection. However, few studies have been conducted on the effects of tea gargling on influenza infection, and the clinical evidence is unclear. Also there have been no studies reported on the gargling effects with tea catechin extracts on the prevention of influenza infection.

Study Type : Interventional  (Clinical Trial)
Enrollment : 400 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Prevention
Official Title: A Randomized Clinical Study of Catechin Gargling Effects on the Prevention of Influenza Infection
Study Start Date : November 2005
Study Completion Date : April 2006

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Flu Flu Shot
Drug Information available for: Cianidanol
U.S. FDA Resources

Primary Outcome Measures :
  1. Incidence rates of influenza infection during the study

Secondary Outcome Measures :
  1. severity of symptoms including complications and hospitalization

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • healthy volunteers
  • aged 20 to 65 years old
  • obtained written informed concent before participation
  • inoculated with influenza vaccine before entering the study

Exclusion Criteria:

  • other gargling except water during the study
  • possessing tea allergy

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00239213

Seirei Hamamatsu General Hospital
Hamamatsu, Shizuoka, Japan, 430-8558
White Cross Nursing Home
Higashi Murayama, Tokyo, Japan, 189-0021
Shizuoka General Hospial
Shizuoka, Japan, 420-8527
Sponsors and Collaborators
University of Shizuoka
Shizuoka General Hospital
Seirei Hamamatsu General Hospital
White Cross Nursing Home
Principal Investigator: Hiroshi Yamada, MD, PhD University of Shizuoka Identifier: NCT00239213     History of Changes
Other Study ID Numbers: CT2005002
First Posted: October 14, 2005    Key Record Dates
Last Update Posted: October 31, 2006
Last Verified: October 2006

Keywords provided by University of Shizuoka:
healthy volunteers

Additional relevant MeSH terms:
Communicable Diseases
Influenza, Human
Orthomyxoviridae Infections
RNA Virus Infections
Virus Diseases
Respiratory Tract Infections
Respiratory Tract Diseases