Monograph: Thuja - Oral

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Date: 2018-08-28

NHPID name

Thuja occidentalis ( Germplasm Resources Information Network Taxonomy )

Proper name(s)

Thuja occidentalis ( USDA 2008 )

Common name(s)

Source material

Herb top ( Unavailable )

Route Of administration


Dosage form(s)

Those suited to the allowable route(s) of administration. This monograph is not intended to include food-like dosage forms such as bars, chewing gums or beverages.

Use(s) or purpose(s)

Statement(s) to the effect of:

Traditionally used in Herbal Medicine as an expectorant to help relieve bronchial mucus buildup (catarrh).  (Hoffmann 2003, Williamson 2003, BHP 1983, Felter and Lloyd 1983[1898])




1 Day per day

See Appendix 1 for examples of appropriate dosage preparations and frequencies of use, according to cited references. The purpose of Appendix 1 is to provide guidance to industry.

Duration of use

For occasional use only.  (Brinker 2001, McGuffin et al. 1997)

Risk information

Statement(s) to the effect of:

Caution(s) and Warning(s): Contraindication(s): Do not use this product if you are pregnant.  (Hoffmann 2003, Brinker 2001, BHP 1983) Known Adverse Reaction(s): No statement is required

Non-medicinal ingredients

Must be chosen from the current Natural health products ingredients database and must meet the limitations outlined in the database.


References cited

References reviewed

Appendix 1: Examples of appropriate dosage preparations, frequencies of use and directions for use


Dried aerial parts:

1 - 2 g, 3 times per day (Williamson 2003; BHP 1983)


1 - 2 g dried aerial parts, 3 times per day (Williamson 2003; BHP 1983)

Directions for use:

Pour 250 ml of boiling water over dried aerial parts and steep for 10-15 minutes (Hoffmann 2003).