The Effect of North American Ginseng on Blood Pressure in Individuals With Hypertension

September 14, 2005 updated by: Risk Factor Modification Centre
To determine the effect of North American ginseng on blood pressure in individuals with hypertension.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Ginseng lacks proper clinical scrutiny for its effect on blood pressure (BP), in spite of observational evidence linking its intake to hypertension. This should be addressed considering the potential overlap between the prevalence of ginseng use and hypertension.

We undertook a single centre, randomized, controlled, double-blinded, crossover trial to determine the effect of North American ginseng (NAG) on 24-hour BP and renal function. After a 4-week placebo run-in, we randomly assigned participants to NAG or placebo treatment for 12-weeks at a dose of 3g/day. This was followed by an 8-week washout, and a subsequent 12-week period in which the opposite treatment was consumed. At run-in, and at weeks 0 and 12 of each treatment period, participants were fitted with an ambulatory BP monitor to assess 24-hour BP and serum cystatin C was measured.

Study Type

Interventional

Enrollment

52

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • Ontario
      • Toronto, Ontario, Canada, M5C 2T2
        • Risk Factor Modification Centre, St. Michael's Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • aged 18 to 85 years
  • hypertension as defined by the use of antihypertensive drugs or a seated systolic blood pressure greater than or equal to 140 mm Hg or a diastolic BP greater than or equal to 90 mm Hg at each of 3 pre-study visits.

Exclusion Criteria:

  • secondary hypertension
  • diabetes
  • kidney
  • liver disease
  • unstable angina
  • ginseng use for two months prior to or during the study
  • any changes in the type or dose of antihypertensive drugs one month prior to or during the study

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Mean 24 Hour Ambulatory Blood Pressure

Secondary Outcome Measures

Outcome Measure
Mean Daytime Ambulatory Blood Pressure
Mean Nighttime Ambulatory Blood Pressure
Cystatin C

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Risk Factor Modification Centre

Collaborators

Ontario Ginseng Growers Association
Ontario Ministry of Agriculture, Food and Rural Affairs

Investigators

  • Principal Investigator: Vladimir Vuksan, PhD, Risk Factor Modification Centre, St. Michael's Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

April 1, 2001

Study Completion

October 1, 2003

Study Registration Dates

First Submitted

September 14, 2005

First Submitted That Met QC Criteria

September 14, 2005

First Posted (Estimate)

September 22, 2005

Study Record Updates

Last Update Posted (Estimate)

September 22, 2005

Last Update Submitted That Met QC Criteria

September 14, 2005

Last Verified

June 1, 2004

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • RFMC-0001-77
  • SR-7093

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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