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Effects of St. John's Wort on the Effectiveness of Oral Contraceptives

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00026013
First Posted: November 6, 2001
Last Update Posted: August 18, 2006
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.
Information provided by:
National Center for Complementary and Integrative Health (NCCIH)
  Purpose
The purpose of this study is to evaluate the effects of a common herbal remedy, St. John's Wort, on the effectiveness of birth control pills. St. John's Wort has recently been shown to increase metabolism of some drugs. If it could increase metabolism of oral contraceptives as well, it may increase the risk of contraceptive failure and unintended pregnancy. Study participants will be evaluated for risk of ovulation on oral contraceptives before and during simultaneous therapy with St. John's Wort.

Condition Intervention
Contraception Drug: hypericum perforatum

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Single
Primary Purpose: Treatment
Official Title: Effects of Hypericum Perforatum on Effectiveness of Oral Contraceptives

Resource links provided by NLM:


Further study details as provided by National Center for Complementary and Integrative Health (NCCIH):

Estimated Enrollment: 25
Study Start Date: January 2002
Estimated Study Completion Date: January 2004
Detailed Description:
See Brief Summary
  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Women taking or willing to take low dose oral contraceptives for 5 months
  • No contraindications to hormonal contraception
  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): NCT00026013


Locations
United States, New York
Columbia University Department of Obstetrics & Gynecology
New York, New York, United States, 10032
Sponsors and Collaborators
National Center for Complementary and Integrative Health (NCCIH)
Investigators
Principal Investigator: Patricia Murphy, DrPh Columbia University
  More Information

ClinicalTrials.gov Identifier: NCT00026013     History of Changes
Other Study ID Numbers: R21AT000836-01 ( U.S. NIH Grant/Contract )
First Submitted: November 5, 2001
First Posted: November 6, 2001
Last Update Posted: August 18, 2006
Last Verified: July 2006

Keywords provided by National Center for Complementary and Integrative Health (NCCIH):
contraception
hormonal contraception
herbal remedies
hypericum perforatum
contraceptive effectiveness

Additional relevant MeSH terms:
Contraceptive Agents
Contraceptives, Oral
Reproductive Control Agents
Physiological Effects of Drugs
Contraceptive Agents, Female