Tea, 4-8 teaspoons per qt. sipped throughout day. 10 drops tincture in warm water every two hours til bleeding commences, for no more than 5 days. Essential oil is fatal - do not ingest. They imitate oxytocin in the body to stimulate uterine contractions and release prostaglandin hormones. All oxytocic herbs are toxic to some degree.
Women can experience very painful contractions.
They are generally hard on the liver. Women with a history of liver disease such as hepatitis may wish to avoid them all together. Some of the constituents of Cohosh are more soluble as tincture. Angelica - see emmenagogues. Tincture 10 drops every few hours til bleeding commences, for no more than 6 days.