Evaulation of Interaction Between Herbal Products and Anticoagulants

This study has been withdrawn prior to enrollment.
Information provided by (Responsible Party):
University of California, San Francisco
ClinicalTrials.gov Identifier:
First received: October 29, 2003
Last updated: May 13, 2013
Last verified: May 2013

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.

Coagulation Disorders

Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Early Identification of Adverse Reactions to Herbs

Resource links provided by NLM:

Further study details as provided by University of California, San Francisco:

Enrollment: 0
Study Start Date: October 2007
Study Completion Date: December 2007
Primary Completion Date: December 2007 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion criteria:

  • Taking longer-term (>6 months) anticoagulation
  • Enrolled in one of Kaiser Permanente Northern California anticoagulation clinics
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00071682

United States, California
San Francisco VA Medical Center
San Francisco, California, United States, 94121
Sponsors and Collaborators
University of California, San Francisco
Principal Investigator: Stephen Bent, MD University of California, San Francisco
  More Information

No publications provided

Responsible Party: University of California, San Francisco
ClinicalTrials.gov Identifier: NCT00071682     History of Changes
Other Study ID Numbers: K08 AT001338-01, K08AT001338-01
Study First Received: October 29, 2003
Last Updated: May 13, 2013
Health Authority: United States: Federal Government

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

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

ClinicalTrials.gov processed this record on August 27, 2015