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Nom scientifique : Hypericum perforatum

Synonyms : amber, touch-and-heal, goat weed, hardhay

Part(s) used

Flower tops

Principal constituents

Hypericin, hyperforin, flavonoids and essential oil

Recognized therapeutic effects

  • Treats reactional depression (light or moderate)
  • Helps overcome insomnia
  • Beneficial in cases of nervous disorders, seasonal affective disorders, fear and anxiety
  • Helps treat viral infections

Traditional use

In external or internal use

  • Treatment of pain and inflammation

In external use

  • Healing wounds

In internal use

  • Treatment of neurological disorders including anxiety, irritability, nervousness, agitation, disturbed sleep, migraine, fibrosis, pain and spasms caused by nerve injuries
  • Treatment of rheumatism and gout
  • Treatment of diarrhea
  • As a diuretic


  • Pregnancy and breastfeeding
  • Depression of endogenous origin (serious depression that can lead to suicide)
  • Less than 5 days before a surgical operation
  • Activities requiring alertness

Please note: During use, exposure to the sun should be avoided.

Drug interactions

  • Increases the effect of various categories of antidepressants (Norpramin, Tofranil, Celexa, Prozac, Fluoxetine, Effexor and Effexor XR)
  • Increases the sedative effect of benzodiazepines, antihistamines, pentobarbital and other medications likely to cause somnolence
  • After repeated doses, decreases the absorption of Lanoxin (Digoxin)
  • Alters quantity and duration of menstrual bleeding when taken with oral contraceptives
  • Reduces the effect of anticoagulants such as Coumadin and Theodur (theophilline)
  • Reduces the effect of Sandimmune and Neoral
  • Increases the serotonergic effect of triptans (anti-migraine agents such as sumatripta, naratriptan and rizatriptan)

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