Introduction

This fact sheet provides basic information about the herb black cohosh--common names, uses, potential side effects, and resources for more information. Black cohosh is a plant native to North America.

Common Names--black cohosh, black snakeroot, macrotys, bugbane, bugwort, rattleroot, rattleweed

Latin Names--Actaea racemosa, Cimicifuga racemosa

What It Is Used For

• Black cohosh has a history of use for rheumatism (arthritis and muscle pain), but has been used more recently to treat hot flashes, night sweats, vaginal dryness, and other symptoms that can occur during menopause.
• Black cohosh has also been used for menstrual irregularities and premenstrual syndrome, and to induce labor.

How It Is Used

The underground stems and roots of black cohosh are commonly used fresh or dried to make strong teas (infusions), capsules, solid extracts used in pills, or liquid extracts (tinctures).

What the Science Says

• Study results are mixed on whether black cohosh effectively relieves menopausal symptoms.
• Studies to date have been less than 6 months long, so long-term safety data are not currently available.
• NCCAM is funding studies to determine whether black cohosh reduces the frequency and intensity of hot flashes and other menopausal symptoms.
• There are not enough reliable data to determine whether black cohosh is effective for rheumatism or other uses.