HerbilousOpen the interactive guideHERB PROFILE · EDUCATIONAL REFERENCE
Black Haw
Important safety information: Do not use Black Haw for threatened miscarriage, labour induction, postpartum bleeding or unexplained pelvic pain. Review with a clinician if taking anticoagulant medicines or if there is a history of kidney stones. Large doses have historically caused nausea and vomiting.
Herbal actions
- Uterine spasmolytic traditionally
- Bronchospasmolytic traditionally
- Astringent
- Hypotensive historically
Traditional and practitioner uses
These uses are presented for historical and educational context. They are not treatment claims.
- Traditional support for dysmenorrhoea and uterine cramping
- Historical use for smooth-muscle spasm and leg cramps
- Historical respiratory-spasm use
Main constituents
Flavonoids, iridoid glycosides, triterpenes, triterpenic acids and coumarins including scopoletin
Preparation overview
Tea: Professional guidance recommended. Kerry Bone's reference dose applies to a 1:2 liquid extract; it is not a pregnancy, labour or bleeding-treatment instruction.
Liquid extract reference: 1:2 liquid extract: 1.5–4.5 mL/day (10–30 mL/week)
Preparation strengths are not interchangeable. Open the interactive guide for the complete evidence notes and sources available for this herb.
Herbilous provides educational information only. It does not diagnose, prescribe, or replace professional medical advice. Seek urgent care for severe or worsening symptoms.