Viburnum chingii

Indigenous peoples of the northern Great Lakes made decoctions from the inner bark of Viburnum opulus to treat fevers, colds, and menstrual cramps, while topical infusions of the bark were used for skin inflammations and wounds; among the Menominee and other Anishinaabe peoples this bark tea was taken for abdominal pains, and the Iroquois prepared it as a cold cure and fever reducer, and in Europe the bark has long been taken as a tea to reduce fevers and calm uterine cramps, with 19th‑century physicians such as Schöpf noting the “febrifuge” effect and nineteenth‑century herbalists like Culpeper and Fernie describing its use for cramps and menorrhagia. In Russia and neighboring regions infusions or weak decoctions of the inner bark were taken for fevers and menstrual complaints, and in Poland the bark infusion was used as a diaphoretic and for painful periods. For pain and skin complaints the inner bark was crushed or powdered and applied in poultices, and sometimes the berries were infused into a tonic, though preparations vary by region.

A practical preparation is a mild bark tea: simmer 1–2 teaspoons of dried inner bark in 250 ml of water for 10 minutes, then steep off the heat for 10 minutes; a decoction using the same proportions may be simmered for 15 minutes. For a 1:5 ethanol tincture, macerate 50 g of dried inner bark in 250 ml of 40% ethanol for 2 weeks in a cool dark place, shaking daily, then press and strain; the resulting tincture typically yields 1 ml tincture from roughly 200 mg of bark. The inner bark contains hydroquinone and phenolic glycosides; it is considered potentially toxic in larger doses and should not be used by pregnant or lactating women or given to children without professional guidance.

The strongest candidate molecules include the dihydroisocoumarin viburnolide, the iridoid loganic acid, cyanogenic glycosides, chlorogenic and caffeic acids, as well as flavonoids like quercetin and kaempferol derivatives; these constituents can account for the documented antispasmodic, diaphoretic, and astringent actions attributed to infusions of the inner bark. Contemporary herbal practice continues to employ Viburnum opulus bark in moderation, and tinctures and decoctions are still offered by European and North American herbalists, while modern phytochemical work is beginning to focus on the bark’s iridoid and phenolic profile and the culinary use of its astringent berries in preserves and syrups.

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