Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Viburnum species, particularly Viburnum opulus (commonly known as cramp bark) and Viburnum prunifolium (black haw), have a long history of traditional use in Western herbal medicine to support the uterus and female reproductive system. These plants have been used for centuries by herbalists to alleviate menstrual cramps, uterine spasms, and to help prevent miscarriage due to their purported antispasmodic and muscle-relaxing effects on uterine smooth muscle.

The evidence base supporting their use is primarily traditional and anecdotal, derived from ethnobotanical texts and early herbal literature. Some early 20th century pharmacopoeias and herbalists recommended Viburnum preparations for dysmenorrhea (painful periods), threatened miscarriage, and other gynecological complaints. The active constituents, such as viburnin, coumarins, and salicin, are believed to contribute to the plant’s antispasmodic action, although direct scientific studies on humans are sparse.

Scientific validation is limited. There are few modern clinical trials assessing Viburnum’s efficacy for uterine conditions. Most available research is in vitro or animal-based, suggesting potential for smooth muscle relaxation, but these findings have not been robustly translated into clinical practice. Therefore, while traditional use is strong and supported by generations of empirical use, scientific evidence remains preliminary, justifying a moderate evidence rating.

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