comfrey

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Related to common comfreys: Symphytum officinale, blackwort

comfrey

/com·frey/ (kom´fre) the perennial herb Symphytum officinale, or a preparation of its leaves and roots, which are demulcent and astringent and are used topically for bruises and sprains and to promote bone healing; also used in folk medicine.

comfrey

(kŭm′frē)
n. pl. com·freys
Any of various hairy perennial Eurasian herbs of the genus Symphytum, especially S. officinale, having variously colored flowers in coiled cymes and long used in herbal medicine.

comfrey

a perennial herb found in the United States, Australia, and parts of Asia, also cultivated in Japan.
uses It is used for bruises, sprains, broken bones, acne, and boils. It is considered safe and possibly effective when used topically.
contraindications Medicinal teas of comfrey are considered unsafe. Use of topical comfrey is not recommended during pregnancy and lactation, in children, and in those who are hypersensitive to this product. Internal use may cause fatal hepatotoxicity. It should not be used for more than 6 weeks or topically on broken skin.
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Comfrey leaf

comfrey

Herbal medicine
A perennial herb, the leaves and roots of which contain allantoin, carotene, essential oil, glycosides, mucilage, resin, saponins, tannins, triterpenoids, vitamin B12 and zinc. Comfrey is a medicinal herb staple, promoting the growth of bone and connective tissue, and breaks down red blood cells (hence its popular name, bruisewort). It is anti-inflammatory, and has been used internally for haemorrhage, diarrhoea, gastric ulcers, colitis, bronchitis, whooping cough, and other respiratory tract infections; it is used topically for burns, bruises, sprains, boils, sore breasts, ulcers, gangrene, haemorrhoids and varicose veins.
 
Toxic effects
Liver tumours may develop in lab rats when exposed to high levels; it is a potential carcinogen.

comfrey,

n Latin name:
Symphytum officinale; parts used: leaves, roots; uses: wound healing, antiinflammatory for bruises and sprains; precautions: pregnancy, lactation, children; external use only; do not use for more than 6 weeks a year; can cause hepatotoxicity, nausea, liver adenoma. Also called
black root, blackwort, boneset, bruisewort, consound, gum plant, healing herb, knitback, knitbone, salsifly, slippery root, and
wallwort.

comfrey