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Effects of Black Cohosh on Menopausal Hot Flashes

This study has been completed.
Information provided by:
National Center for Complementary and Integrative Health (NCCIH) Identifier:
First received: February 2, 2001
Last updated: August 17, 2006
Last verified: August 2006
This study will assess whether treatment with black cohosh is effective in reducing the frequency and intensity of menopausal hot flashes. In addition, this study will determine whether or not black cohosh reduces the frequency of other menopausal symptoms and improves quality of life.

Condition Intervention Phase
Hot Flashes
Osteoporosis, Postmenopausal
Drug: Black Cohosh
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Primary Purpose: Treatment
Official Title: Effects of Black Cohosh on Menopausal Hot Flashes

Resource links provided by NLM:

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

Study Start Date: September 1999
Estimated Study Completion Date: July 2005
Detailed Description:

Most American women will spend the last third of their lives post-menopause. During this time, chronically low levels of steroidal estrogens may lead to a number of short and long-term medical sequelae such as hot flashes, vaginal dryness, heart disease, and osteoporosis. While some physicians believe that demonstrated beneficial effects of estrogen, particularly on the cardiovascular and skeletal systems, warrant the taking of hormone therapy from menopause on, many women choose not to take estrogen replacement therapy (ERT) and are increasingly exploring alternative approaches to ERT.

For centuries, black cohosh (Cimicifuga racemosa) has been used worldwide for women's health. Despite its long-standing use, studies of black cohosh have yielded conflicting data, in part because of lack in study design rigor and the short duration of studies to date. The primary aim of this study is to correct past shortcomings in study design to determine whether treatment with black cohosh is effective in treating menopausal symptoms.

Participants in this study will be given black cohosh for a 12-month period. Potential mechanisms of action of black cohosh will be examined by quantifying the levels of sex hormones, including estradiol, estrone, FSH, and LH. Because black cohosh may act as an estrogenic agent, the effect on endometrium will be evaluated by sonogram and by monitoring the incidence of adverse events and compliance with the study.


Ages Eligible for Study:   45 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Resident of the New York Metro Area
  • Postmenopausal
  • Weight within 90% to 120% of ideal body weight
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00010712

United States, New York
Columbia University Rosenthal Center for CAM
New York, New York, United States, 10032
Sponsors and Collaborators
National Center for Complementary and Integrative Health (NCCIH)
Principal Investigator: Dr. Fredi Kronenberg Columbia University
  More Information Identifier: NCT00010712     History of Changes
Obsolete Identifiers: NCT00009386
Other Study ID Numbers: P50AT000090-01P3 ( US NIH Grant/Contract Award Number )
P50AT000090-01 ( US NIH Grant/Contract Award Number )
Study First Received: February 2, 2001
Last Updated: August 17, 2006

Keywords provided by National Center for Complementary and Integrative Health (NCCIH):
Hot Flashes

Additional relevant MeSH terms:
Hot Flashes
Osteoporosis, Postmenopausal
Bone Diseases, Metabolic
Bone Diseases
Musculoskeletal Diseases
Signs and Symptoms processed this record on May 24, 2017