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Blue Cohosh (Caulophyllum thalictroides)Female Reproductive

Blue Cohosh (Caulophyllum thalictroides)

Overview

Blue cohosh is an upright perennial herb reaching 3 feet in height, with large three-lobed leaves, yellow to purple flowers, and striking blue berries. It grows wild in much of eastern North America from Manitoba to Alabama, preferring woodland valleys and damp, north-facing slopes. The name 'cohosh' comes from the Algonquin language, and the plant was a popular remedy among many Native American tribes. Though taken by both sexes for genitourinary issues, it was primarily valued as a women's herb, and that tradition continues in modern herbal practice.

Traditional uses & properties

Blue cohosh is renowned as a uterine tonic that brings relief from uterine and ovarian pain while regulating menstrual blood flow. Herbalists use it in small doses over time to induce delayed menstruation or labor. Taken during labor, it strengthens contractions and eases the pain of childbirth. Its dual tonic action stimulates and relaxes the uterus simultaneously, making it helpful for relieving painful menstrual symptoms such as cramps and breast pain. The herb also benefits ovarian pain and has anti-inflammatory activity, which may be useful in treating arthritic and rheumatic conditions. The root and rhizome contain alkaloids, steroidal saponins, and resin.

Preparations & dosage

Standard decoction: ½–1 cup, 3 times daily. Tincture (dried root 1:5, 60% alcohol): 0.5–2 ml (0.1–0.4 tsp.) up to 4 times daily. Capsules: 500 mg, 2 times daily.

Safety & precautions

Use only under professional supervision. Do not take during pregnancy or while trying to conceive, as it stimulates uterine contractions and could induce miscarriage. Avoid during heavy menstrual bleeding. It can be used by women past their due date to induce labor, but only with professional oversight. The plant is mildly toxic in large doses and can cause contact dermatitis. Not recommended while breastfeeding.

Habitat

Blue cohosh grows wild throughout much of eastern North America, from Manitoba to Alabama. It prefers woodland valleys and damp, north-facing slopes, and is mainly wild-harvested but also cultivated commercially. The root and rhizome are harvested in autumn.

Traditionally used for

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