Saint John's wort

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Saint John's wort

 [sānt jonz wort]
any of various species of the genus Hypericum; H. perforatum is the medicinal herb, which is used as a mild antidepressant, sedative, and anxiolytic; it is also used topically for inflammation of the skin, contusions, myalgia, and first-degree burns.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

Saint John's wort


Saint John'swort

(jŏnz′wûrt′, -wôrt′)
1. Any of various herbs or shrubs of the genus Hypericum, having opposite leaves and yellow flowers with five petals and numerous stamens. Also called hypericum.
2. A preparation made from one of these plants (H. perforatum), used in herbal medicine especially as an antidepressant.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

Saint John’s wort

Fringe medicine
An essence which, in the pseudoscience of flower essence therapy, is said to provide a sense of consciousness, self-awareness and inner strength. 

Herbal medicine
A perennial herb containing flavonoids, glycosides, mucilage, tannins and volatile oil, which is antibacterial, anti-inflammatory, antimicrobial, astringent, expectorant and sedative; it has been used internally for arthritis, bed-wetting, bronchitis, colds, mental disorders (anxiety, depression, insomnia, nervousness), menstrual cramps, neuralgia, rheumatic pain and sciatica, and topically for burns, cuts and wounds. It was used transiently as a herbal therapy for AIDS.
St John’s wort has been deemed unsafe by the FDA, given its phototoxicity; it causes hypertension, headaches, nausea, and vomiting; it may interact with amphetamines, amino acids (tryptophan, tyrosine), anti-asthmatic inhalants, beer, wine, chocolate, coffee, fava beans, cold and hay fever medication, narcotics, nasal decongestants and smoked or pickled foods.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.