Botanical Overview
Thuja occidentalis, commonly known as Arborvitae or Northern white cedar, belongs to the family Cupressaceae. It is native to North America, especially Eastern Canada and the Northeastern United States. The parts used medicinally include the leaves, twigs, and essential oil extracted from the foliage.
Energetics
The plant has a cooling temperature with drying moisture quality, featuring bitter and pungent tastes. Its energetic directionality is ascending and outward, with a tonifying effect primarily on qi.
Primary Actions
- Antimicrobial
- Antiviral
- Expectorant
- Astringent
- Vulnerary
Indications
Western
- Cough
- Bronchitis
- Rhinitis
- Warts
- Skin infections
Syndromes
- Respiratory catarrh
- Chronic bronchitis
- Viral infections
TCM
No traditional indications recorded.
Ayurveda
No traditional indications recorded.
Unani
No traditional indications recorded.
Constituents & Mechanisms
Contains thujone (a monoterpene ketone), flavonoids, tannins, volatile oils, and resins which contribute to its antimicrobial and expectorant properties.
Dosage & Preparations
- Tincture 1:5 45% ethanol, 1-3 mL 2-3 times daily
- Infusion 1-2 g per cup, 2 times daily
- Essential oil topical use diluted to 1-2%
Safety & Contraindications
Contains thujone which can be neurotoxic and potentially epileptogenic in high doses. Avoid use during pregnancy, especially due to abortifacient risks, and in epilepsy or liver disease. Use essential oil only in diluted form topically. Monitor for interactions with sedatives or anticonvulsants.
Astrological Correspondences
No reliably sourced planetary or elemental rulers identified.
Selected References
- European Union Herbal Monograph on Thuja occidentalis L., EMA 2015
- Phytotherapy: A Quick Reference to Herbal Medicine, Michael J. Balick, 2009
- Herbal Medicine: Biomolecular and Clinical Aspects, Iwu MM, 2011