Cramp Bark and Powder Profile
Also known as- Viburnum opulus, Guelder rose, Black Haw, Cranberry Tree, Dog Rowan Tree, Viburnum, May Elder, King's Crown, and May Rose.
Introduction
Cramp bark is a large deciduous shrub growing as much as 15 feet (5 m) tall and 15 feet wide. It is native to the moist lowland forests of England and Scotland and naturalized to moist forests of the northern United States and southern Canada.
A member of the honeysuckle family, cramp bark bears large white flowers, up to 5 inches (12 cm) across that yield red berries in the fall. The berries are eaten like cranberries, although moderation is recommended.
Constituents
Coumarins, scopoletin, tannin.
Parts Used
Dried bark, harvested in the autumn before leaves change color, or in the spring before leaves open. The leaves and fruit are used in laxatives.
Typical Preparations
Teas or tinctures. In rare instances, used as a ground herb administered in capsules. Often combined with corydalis and/or valerian for pain.
Summary
Cramp bark, as its name suggests, is used to treat cramps and spasms of all types. The bark is is antispasmodic, astringent, and sedative, especially in the uterus. Cramp bark has been traditionally used to relieve menstrual cramps and spasms after childbirth and to prevent miscarriage. The herb is also popularly used in combinations to treat asthma and nervous tension.
Precautions
Cramp bark is essentially nontoxic, although taking large quantities of the fruit or leaf can cause diarrhea. Not recommended while taking blood thinning medications.
