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