Acid compounds, amyrins, astragalin, beta-sitosterol, coumarins, minerals, esculetin, glucosides, hydroquinones, myricyl alcohol, paeoniside, pectin, protein, resin, tannins, viopudial.
Cinnamaldehyde, eugenol.
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The bark of cramp bark is peeled off the tree during the spring and summer months. The bark should be peeled off in strips carefully in order not to kill the tree. The bark is chopped up and dried.
Although the stem bark of cat's claw has some medicinal activity, the root is three to four times more active than the stem bark. Strength of active properties varies depending on when the plant is harvested.
Antispasmodic, anti-inflammatory, nervine, hypertensive, astringent, emmenagogic, sedative and antiscorbutic.
Saponins, tannins, calcium oxalate, starch, glycosides, oak-red, resin, pectin, levulin, and quercitol.
Antibacterial, antiseptic, antiviral, antispasmodic, and antifungal properties.
Some sources state that the berries of cramp bark are toxic and should not be eaten.
There are no indications of any interactions between cramp bark and any other drug or herbal medicine.
Viburnum opulus is a member of the Caprifoliaceae family.
Cramp bark has culinary applications, being used to make jelly, alcoholic beverages and in certain food dishes.
Although chiefly valued for its decorative fine-grained wood, the tree's bark, root, leaves, and nuts all have medicinal properties.