Agnus Castus & Black Cohosh for Menopause: Benefits & Safety

Black cohosh (Cimicifuga racemosa) and agnus castus (Vitex agnus-castus) are two evidence-based herbal options for managing menopausal symptoms, particularly vasomotor symptoms (hot flashes, night sweats).

Black Cohosh

Native to North America, traditionally used for menstrual and menopausal complaints. Active constituents include triterpene glycosides (actein, cimicifugoside). Clinical trials show modest but significant reduction in hot flash frequency and severity over 12 weeks.

Agnus Castus (Chasteberry)

Mediterranean herb acting on the hypothalamic-pituitary-ovarian axis, modulating prolactin and dopamine. Studies demonstrate improvement in hot flashes, mood, and sleep within 4–8 weeks.

Combination Use

Some trials suggest synergistic effects when used together, though data are limited. Both are generally well-tolerated; mild GI upset, headache, or dizziness may occur.

Safety & Precautions

• Black cohosh: rare hepatotoxicity reports—monitor liver enzymes if used long-term.
• Agnus castus: avoid in pregnancy, hormone-sensitive cancers, or with dopamine agonists/antagonists.
• Always consult a healthcare provider before starting herbal therapy, especially if taking other medications.