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Blue Cohosh (Caulophyllum thalictroides) is an eastern North American woodland perennial historically used in women’s herbal traditions. It is botanically unrelated to black cohosh.
Identification
The plant produces divided blue-green leaves, small greenish-yellow flowers, and conspicuous blue berry-like seeds later in the season.
Traditional Use
Historical herbal literature describes root and rhizome preparations for menstrual and childbirth-related purposes. These uses developed before modern toxicology and should not be treated as instructions for self-use.
Pregnancy Warning
Blue cohosh is a high-caution herb in pregnancy. It has been associated with uterine stimulation, and case reports have raised concern about serious maternal and newborn cardiovascular effects. Pregnancy or labor use should not be self-directed.
Research & Chemistry
The plant contains alkaloids and saponins with biologically active effects. Modern evidence does not establish a general safe home dose for childbirth or pregnancy applications.
Safety
Concentrated use may affect blood pressure, the cardiovascular system, and uterine activity. The blue seeds are not a casual edible berry. Children and pets should not have access to plant material intended for medicinal use.
History
Blue cohosh remains important to the history of North American herbalism, but modern safety information warrants far more caution than older domestic herbals often conveyed.
Educational information only.