Black Haw Bark
A traditional antispasmodic herb for relieving menstrual cramps and uterine tension.
Also known as: Viburnum prunifolium • Stag Bush
Overview
Black Haw is a North American shrub whose bark has been used traditionally by Native Americans and herbalists as a powerful uterine relaxant. It is primarily used to alleviate painful menstrual cramps (dysmenorrhea) and to help prevent miscarriage by calming uterine contractions.
Key Benefits
Relieves Menstrual Cramps
Contains scopoletin and other compounds that have antispasmodic and muscle-relaxing effects on the uterus.
Reduces Uterine Spasms
Acts as a uterine sedative, helping to calm an irritable uterus and reduce excessive contractions.
May Help Prevent Miscarriage
Traditionally used to support a healthy pregnancy by relaxing the uterus, but this should only be done under professional supervision.
Dosage & How to Take
Best used as a liquid tincture for fast absorption.
| Purpose | Dose | Notes |
|---|---|---|
| Acute Cramps | 2-4 mL of tincture every 2-3 hours | Start taking it as soon as cramps begin. |
| Cramp Prevention | 2 mL of tincture 2-3 times daily | Begin 2-3 days before your expected period. |
Best Time to Take
Use as needed for acute symptoms or prophylactically before menstruation.
With or Without Food
Can be taken with or without food. Diluting the tincture in water can improve taste.
Forms & Bioavailability
| Form | Absorption | Best For | Notes |
|---|---|---|---|
| Tincture (Liquid Extract) | High | Fast-acting relief from cramps | The most traditional and effective form. |
| Capsules/Dried Bark | Moderate | General support and convenience | May be less effective for acute situations. |
Side Effects & Safety
Common
- Generally well-tolerated.
Rare
- Nausea or stomach upset in high doses.
Contraindications
- Known allergy to Viburnum species.
Interactions
May have a mild hypotensive effect, use with caution.
Scientific Research
Ethnobotany of the Menominee Indians
Historical texts document the use of Black Haw by the Menominee people for treating cramps and uterine troubles.
Food Sources
Frequently Asked Questions
Medical Disclaimer
This content is for educational and informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen, especially if you have pre-existing health conditions or are taking medications. The statements on this page have not been evaluated by the Food and Drug Administration.