Liquiritiae radix

Authors: Prof. Dr. med. Peter Altmeyer, Prof. Dr. med. Martina Bacharach-Buhles

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Last updated on: 29.10.2020

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Glycyrrhiza glabra; Licorice; Licorice root; Radix liquiritiae. Liquorice root

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Liquorice root, drug from the unpeeled or peeled dried root of Glycyrrhiza glabra the liquorice shrub. There are positive monographs from Commission E and ESCOP.

Effective ingredients are: 2-15% glycyrrhizin (according to PH.Eur. at least 4% of dry weight), glycyrrhetinic acid, mannitol, glucose, sucrose, flavone glycosides (e.g. liquiritin).

Field of application/use
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Indications: Bronchitis, Ulcus ventriculi/duodeni, Aphthae.

An extract of liquorice can also be successfully used for Chloasma.

Dosage and method of use
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Average daily dose: approx. 5-15 g of drug corresponding to 200-800 mg of glycyrrhizin; Succus Liquiritiae: 0.5-1 g for catarrhal phenomena of the upper respiratory tract; 1.5-3 g for ulcus ventriculi/duodeni.

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Severe liver disease, hypertension, existing angina pectoris, terminal renal failure, pregnancy (see also the comments under glycyrrhizin).

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Mostly as combination preparations, different tea blends are offered for the different indications:

Bladder Kidney Tea Stada® N, Bladder Kidney Tea Uroflux® Tea Infusion Powder, Bronchostad®, Chest and Cough Tea Stada® N, Buccotean®TF, Dr. Klinger's stomach tea, Fugacid® bladder tea, Fugacid® neurogast tea, urine tea 400, skin and blood cleansing tea, Heumann Bronchial Tea Solubifix® N, Heumann Magentee Solu-Vetan® NG, Kneipp®Gastropressan, Gastrointestinal Tea, Nieron® Bladder and Kidney Tea VI, Orbis® Bladder and Kidney Tea, Orbis® Cough and Bronchial Tea, Renob® Bladder and Kidney Tea, Solu-Vetan® NG cum Belladonna, Warando® Laxative

Lakriment Pastilles® (mono preparation): Dosage: 1-1-1 or 2-2-2/day

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Licorice contains about 20% of the liquorice sugar contained in liquorice.

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  1. Jung JC et al (2016) Hepatoprotective effect of licorice, the root of Glycyrrhiza uralensis Fischer, in alcohol-induced fatty liver disease. BMC Complement Altern Med 16:19.
  2. Kamei J et al (2005) Pharmacokinetic and pharmacodynamic profiles of the antitussive principles of Glycyrrhizae radix (licorice), a main component of the Kampo preparation Bakumondo-to (Mai-men-dong-tang). Eur J Pharmacol 507:163-168.
  3. Sun C et al (2008) Analysis of glycyrrhizic acid and liquiritin in liquorice root with microwave-assisted micellar extraction and pre -concentration. Phytochemical anal 19:160-163.
  4. Yang XL et al (2013) Study on in vitro anti-inflammatory activity of total flavonoids from Glycyrrhizae Radix et Rhizoma and its ingredients. Zhongguo Zhong Yao Za Zhi 38:99-104.