Monograph: Licorice

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Date: 2018-12-18

NHPID name

Glycyrrhiza glabra ( Germplasm Resources Information Network Taxonomy )

Proper name(s)

Glycyrrhiza glabra ( USDA 2008 )

Common name(s)

Source material

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:




1 Day per day

Duration of use

Consult a health care practitioner/health care provider/health care professional/doctor/physician for use beyond 4-6 weeks.  (ESCOP 2003, Hoffmann 2003, Blumenthal et al. 2000, Bradley 1992)

Risk information

Statement(s) to the effect of:

Caution(s) and Warning(s): Contraindication(s): 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

Brinker F. 2001. Herb Contraindications and Drug Interactions, 3rd edition. Sandy (OR): Eclectic Medical Publications.

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

Dried root and stolon:


Directions for use:


Directions for use:

Take after meals (Blumenthal et al. 2000).

Tincture: 0.2-0.6 g dried equivalent, 3 times per day
(1:5, 40% alcohol, 1-3 ml) (Hoffmann 2003)

Preparations providing the following quantity of glycyrrhizic acid:

60-600 mg, per day (ESCOP 2003)