Cramp bark, derived from the bark of Viburnum opulus, has a long history of use in traditional herbal medicine, particularly for easing muscle tension and supporting menstrual comfort. Research suggests that compounds in cramp bark, including viopudial and scopoletin, may have antispasmodic properties that help relax smooth muscle tissue, which is why it has been traditionally associated with relief from menstrual cramping and general muscular discomfort. Studies indicate that these relaxant effects may extend beyond the uterine muscles, potentially supporting broader relaxation and comfort during periods of physical tension. While scientific investigation into cramp bark is still evolving, its centuries-long use across European and Indigenous North American herbal traditions has kept it a subject of continued interest among herbalists and researchers alike.
Compare this supplementResearch suggests that cramp bark's potential muscle-relaxing effects may involve the activation of KCNQ5 potassium c...
View studies →Research suggests that cramp bark's traditional reputation as a vasorelaxant and antispasmodic may have a plausible m...
View studies →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Capsule | 400–800 mg | Three times daily | Smooth muscle relaxation and menstrual cramp relief | Traditional use; referenced in herbal pharmacopoeias |
| Extract | 300–500 mg | Three times daily | Menstrual health and muscle relaxation | Common in standardized extract formulations based on traditional and herbal medicine references |
| Liquid | 2–4 mL | As needed | Acute muscle spasm and relaxation | Traditional use; British Herbal Pharmacopoeia guidance |
| Liquid | 4–8 mL | Three times daily | Menstrual cramps and dysmenorrhea | Traditional use and herbal reference standards; tincture (1:5 preparation) |