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Evaulation of Interaction Between Herbal Products and Anticoagulants

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ClinicalTrials.gov Identifier: NCT00071682
Recruitment Status : Withdrawn
First Posted : October 30, 2003
Last Update Posted : May 15, 2013
Information provided by (Responsible Party):

Study Description
Brief Summary:
The purpose of this study is to determine if the use of herbal products interferes with normal anticoagulation, leading to either excessive thinning of the blood and bleeding problems or inadequate thinning of the blood and clotting problems. Many patients who are on long term anticoagulation, or blood thinning, for a variety of medical problems, also take herbal products. It is not yet known whether use of herbal products interferes with this anticoagulation, and puts patients at risk for bleeding or clotting. This study will carefully monitor patients who are taking herbs and anticoagulants to determine if their laboratory tests show signs of being affected by the herbs. The study will ask all patients about their herbal product use, so all reported herbs will be included and monitored.

Condition or disease
Coagulation Disorders

Study Design

Study Type : Observational
Actual Enrollment : 0 participants
Time Perspective: Prospective
Official Title: Early Identification of Adverse Reactions to Herbs
Study Start Date : October 2007
Primary Completion Date : December 2007
Study Completion Date : December 2007
Groups and Cohorts

Outcome Measures

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion criteria:

  • Taking longer-term (>6 months) anticoagulation
  • Enrolled in one of Kaiser Permanente Northern California anticoagulation clinics
Contacts and Locations

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 ClinicalTrials.gov identifier (NCT number): NCT00071682

United States, California
San Francisco VA Medical Center
San Francisco, California, United States, 94121
Sponsors and Collaborators
University of California, San Francisco
National Center for Complementary and Integrative Health (NCCIH)
Principal Investigator: Stephen Bent, MD University of California, San Francisco
More Information

Responsible Party: University of California, San Francisco
ClinicalTrials.gov Identifier: NCT00071682     History of Changes
Other Study ID Numbers: K08AT001338-01 ( U.S. NIH Grant/Contract )
First Posted: October 30, 2003    Key Record Dates
Last Update Posted: May 15, 2013
Last Verified: May 2013

Keywords provided by University of California, San Francisco:
herbal medicine
alternative medicines
side effects

Additional relevant MeSH terms:
Blood Coagulation Disorders
Hemostatic Disorders
Hematologic Diseases
Vascular Diseases
Cardiovascular Diseases
Hemorrhagic Disorders