Tanacetum parthenium, known as feverfew, is a flowering plant in the daisy family, Asteraceae. It may be grown as an ornament, and is usually identified by its synonyms, Chrysanthemum parthenium and Pyrethrum parthenium.
(L.) Sch. Bip.
The plant is a herbaceous perennial that grows into a small bush, up to 70 cm (28 in) high, with pungently-scented leaves. The leaves are light yellowish green, variously pinnatifid. The conspicuous daisy-like flowers are up to 20 millimetres (3⁄4 in) across, borne in lax corymbs. The outer, ray florets have white ligules and the inner, disc florets are yellow and tubular. It spreads rapidly by seed, and will cover a wide area after a few years.
Distribution and cultivationEdit
A perennial herb, it should be planted in full sun, 38 to 46 cm (15–18 in) apart, and cut back to the ground in the autumn. It grows up to 70 cm (28 in) tall. It is hardy to USDA zone 5 (−30 °C (−22 °F)). Outside of its native range, it may become an invasive weed.
In traditional medicine, feverfew has been used to treat headache, but there is no confirmed scientific evidence that it has such an effect. Feverfew contains parthenolide, which is under basic research to assess its properties on cancer. Feverfew is registered as a traditional herbal medicine in the Nordic countries under the brand name Glitinum. Only powdered feverfew is approved in the European Union herbal monograph.
Long-term use of feverfew followed by abrupt discontinuation may induce a withdrawal syndrome featuring rebound headaches and muscle and joint pains. Feverfew may cause allergic reactions, including contact dermatitis. Other side effects have included gastrointestinal upset such as nausea, vomiting, abdominal pain, diarrhea, and flatulence. When the herb is chewed or taken orally it may cause mouth ulcers and swelling and numbness of the mouth. Feverfew should not be taken by pregnant women. It may interact with blood thinners and increase the risk of bleeding, and also may interact with a variety of medications metabolized by the liver.
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- National Center for Complementary and Integrative Health, US National Institutes of Health. "Feverfew". Retrieved 1 December 2020.
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- Draves AH, Walker SE (2004). "Parthenolide content of Canadian commercial feverfew preparations: Label claims are misleading in most cases" (PDF). Canadian Pharmacists Journal. 136 (10): 23–30. Archived from the original (PDF) on 2012-04-20.
- "Feverfew". University of Maryland. Retrieved 6 October 2011.
- "Agricultural (Herbs and Spices): Feverfew Information". Government of Saskatchewan. Archived from the original on 4 November 2012. Retrieved 6 January 2012.
Johnson, E. S.; Kadam, N. P.; Hylands, D. M. (August 31, 1985). "Efficacy Of Feverfew As Prophylactic Treatment Of Migraine". British Medical Journal (Clinical Research Edition). 291 (6495): 569–573. doi:10.1136/bmj.291.6495.569. JSTOR 29520398. PMC 1418227. PMID 3929876.
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- Feverfew information from the National Center for Complementary and Integrative Health
- Feverfew in A Modern Herbal
- "feverfew: Tanacetum parthenium (Asterales: Asteraceae): Invasive Plant Atlas of the United States". Invasive Plant Atlas of the United States - Database of Plants Invading Natural Areas. Retrieved 2020-11-21.
- "feverfew, Tanacetum parthenium Asterales: Asteraceae". Invasive.Org. Retrieved 2020-11-21.