St John's Wort
- SCIENTIFIC NAMES: Hypericum perforatum; Kira (Lichtwer); Quanterra Emotional Balance (Warner Lambert)
- INDICATIONS: Depression, dysthymic disorder, fatigue, insomnia, loss of appetite, anxiety, obsessive-compulsive disorders, mood disturbances, migraine headaches, neuralgia, fibrositis, sciatica, palpitations, exhaustion, headache, muscle pain, vitiligo, diuretic, bruises, abrasions, first-degree burns, hemorrhoids
- SYNONYM: Hypericaceae
- CLASS: Anxyolytic, CYP3A4 inducer
- HALF-LIFE: 24–48 hours
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PREGNANCY CATEGORY: N/A
St John's wort is a natural source of flavoring in Europe. Although not indigenous to Australia, and long considered a weed, St John's wort is now grown there as a cash crop and produces 20% of the world's supply.
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Page last updated 07/31/2023
Symbol key
Incidence 
- <1%
- 1-5%
- 5-10%
- 10-15%
- 15-20%
- 20-30%
- >30%
Warnings in other populations 
- Breast feeding
- Geriatric
- Pediatric