Inhibitory effects of St. John's Wort on inflammation: ignored potential of a popular herb.

St. John's wort (Hypericum perforatum L., family Hypericaceae) is a flowering herb, which has been used traditionally for decades in Europe and other parts of the world for the treatment of depressive mood disorders. A number of clinical trials support its application in the treatment of depressive mood symptoms. Although not commonly known for this use, St John's wort is also reputed for its usefulness in inflammatory conditions such as sciatica and fibromyalgia. This article discusses evidence from in vitro and in vivo studies supporting a possible use of St. John's wort as an anti-inflammatory remedy, in addition to its well-known antidepressant effects.