Black Cohosh Dangers

Black cohosh root is a popular herbal therapy for relieving unpleasant symptoms of menopause, as well as for treating menstrual cramps and irregular cycles. Other possible uses include treatment of colds, sore throat, hives, constipation and high blood pressure. Some side effects may be serious.

Allergic Reactions

• As a member of the buttercup family, black cohosh may cause allergic reactions in anyone allergic to these plants. Additionally, because black cohosh contains salicylic acid, people allergic to aspirin may not be able to take black cohosh.

Blood Pressure

• Because black cohosh root may lower blood pressure, people who have low blood pressure or who are taking medication to treat high blood pressure should be cautious about using black cohosh.

Estrogen

• According to the Mayo Clinic, researchers have not determined the reason black cohosh is effective for treating menopausal symptoms, but some speculate it involves hormonal activity. Women with a history of breast cancer and other hormone-related illnesses should only use black cohosh while under a doctor's supervision.

Liver Issues

• Some countries, including Australia and the United Kingdom, have added a warning label to black cohosh products addressing the rare risk of liver damage.

Pregnancy Concerns

• Black cohosh has been used historically both to prevent miscarriage and to induce labor, so pregnant women should not take this herb.