The Library Brands All Products for Encyclopedia Health Concerns Vitamins, Minerals, etc.
Blue cohosh grows throughout North America.
2 Several other alkaloids may be active in this herb, but there is currently insufficient research about the active constituents of blue cohosh. Blue cohosh is generally used in combination with other herbs. Large amounts of blue cohosh can cause nausea, headaches, and high blood pressure. Blue cohosh should only be used under medical supervision and in limited amounts. It is unsafe in pregnancy, except with skilled professional guidance.