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Meyan Kökü Extractı

Meyan kökü extractı herbal kortizon olarak bilinir.Kortizonlu kremlerle aynı etkilere sahiptir.Kurdeşen,anal dermatit,böcek sokması gibi sebebi bilinen kaşıntıları ve nedeni tespit edilemeyen kaşıntı,ciltte kızarma,şişlik gibi cilt rahatsızlıklarında güvenle kullanılır.Kortizonlar yan etkileri sebebiyle kısa süre kullanılırken meyan kökü içeren kremler kortizonların yaptığı yan etkiye sebep olmaz.

Meyan kökünün kortizonlarla kıyaslandığı çalışma

Different Effects of Traditional Chinese Medicines Containing Similar Herbal Constituents on Prednisolone Pharmacokinetics

  7. HISAO ITOH1,3

Article first published online: 12 APR 2011

DOI: 10.1111/j.2042-7158.1995.tb05861.x


Three major traditional Chinese medicines (TCM), Sho-saiko-To, Saiboku-To, and Sairei-To, consist of similar herbal prescriptions containing glycyrrhizin, which is a strong inhibitor of 11β-hydroxysteroid dehydrogenase. We performed cross-over open trials in healthy subjects to clarify prednisolone pharmacokinetics on co-administration of these preparations.

All subjects received a single oral dose of 10 mg prednisolone before oral treatment with one of the test preparations. After a 2-week wash-out interval, they received one of the test preparations for three days at daily doses of 7·5 or 9·0 g. On the third study day, 10 mg prednisolone was administered orally in combination with the test preparation. Area under the curves (AUC) of prednisolone before and after the treatment decreased from 0·94 to 0·78 mg h L−1 (P < 0·05) in the Sho-saiko-To group, increased from 0·92 to 1.06 mg h L−1 (P < 0·01) in the Saiboku-To group, and did not change in the Sairei-To group. AUC ratios of prednisone and prednisolone, which reflect the 11β-hydroxysteroid dehydrogenase activity, increased in the Sho-saiko-To group (P < 0·01), decreased in the Saiboku-To group (P < 0·01), and did not change in the Sairei-To group after the treatments. Similar results were observed in ratios of endogenous cortisone to cortisol.

Because of the equal glycyrrhizin content in all three preparations, it was unexpected that the 11β-hydroxysteroid dehydrogenase effect was different amongst the three groups. These observations suggest that some unknown metabolic enzyme modifiers, promoters or inhibitors, may be involved in these traditional treatments.



Meyan kökü extractının ödem giderici etkisi üzerine yapılmış çalışma

[Pharmacological study of the anti-inflammatory agent glyderinine].

[Article in Russian]

Azimov MM, Zakirov UB, Radzhapova ShD.


In experiments on various animals glyderinine, a derivative of glycyrrhizic acid isolated from Glycyrrhiza glabra, was found to exert a pronounced anti-inflammatory effect exceeding that of hydrocortisone and amidopyrine. The mechanism of the anti-inflammatory effect was to a certain degree related to the adrenal cortex, suppression of vascular permeability and antagonism to inflammation as well. Similarly to other anti-inflammatory agents, glyderinine possesses analgesic and antipyretic properties, but unlike them it fails to suppress hemopoiesis and to cause ulceration of the gastrointestinal mucosa. The drug is of low toxicity and exerts the antiallergic effect. Glyderinine was successfully tried and recommended for a wide use as an ointment for treating skin diseases.

Meyan kökünün kurdeşen (atopik dermatitte kullanımı)

The treatment of atopic dermatitis with licorice gel


Atopic dermatitis is the cutaneous expression of the atopic

state, characterized by a family history of asthma, hay

fever, or dermatitis in up to 70% of patients.1 Hanifin

summarized four current hypotheses concerning the cause

of atopic dermatitis in his review: cyclic nucleotide

dysfunction, the role of superantigen, Ig-Emediated allergy

to airborne and food allergens, and autoimmunity to selfantigen.

2 Topical corticosteroid creams or ointments are

themainstay of therapy to control the acute flares of atopic

dermatitis, probably due to their broad immunomodulatory

effects.3,4 As these and other therapies have side effects

it is necessary to evaluate new therapeutic methods. A

traditional Chinese medication consisting of a mixture of

several herbs, especially Glycyrrhiza uralensis (a Chinese

species of licorice) has provided a therapeutic option for

children with extensive atopic dermatitis.5,6 Chinese

licorice root (G. Uralensis) which is a staple herb for skin

disease in east Asia, contains steroid-like substances,

which, when taken internally, or even applied topically,

rapidly provide relief.7

Glycyrrhiza glabra L. is native to Eurasia and

cultivated in Europe (e.g. Spain, Italy, France), the

Middle East (e.g. Syria, Iran, Turkey, Iraq), and Asia.

Those parts used are the dried roots collected in the

autumn.8 G. glabra contains substantial amounts of

flavones, such as liquiritigenin and liquiritin, and

triterpenoids, such as glycyrrhetinic acid and glycyrrhizin.

Liquiritigenin, disodium glycyrrhetinic acid and

glycyrrhizin have been shown to have antiinflammatory

activity.9–11 Glycyrrhiza glabra has significant

anti-inflammatory and anti-allergic activity.

Glycyrrhizin reinforces cortisol’s inhibition of antibody

formation, stress reaction, and inflammation. Alcohol

extract of G. glabra has displayed anti-microbial activity

in vitro against Staphylococcus aureus, Streptococcus

mutans, Mycobacterium smegmatis, and Candida albicans.

The majority of the antimicrobial effects are due to

soflavenoid components, with the saponins having a

lesser antibacterial effect.12 This study was designed to

compare the clinical efficacy of licorice gel (1% and 2%)

with that of placebo, in patients with atopic dermatitis.

M Saeedi1, K Morteza-

Semnani2 and M-R Ghoreishi3

Departments of 1Pharmaceutics and

2Medicinal Chemistry, Faculty of

Pharmacy, Mazandaran University of

Medical Sciences, Sari, Iran;

3Dermatologist, Sari, Iran

Glycyrrhiza glabra L. has been

used in herbal medicine for skin

eruptions, including dermatitis,

eczema, pruritus and cysts. The

effect of licorice extract as topical

preparation was evaluated on

atopic dermatitis. The plant was

collected and extracted by percolation

with suitable solvent.

The extract was standardized,

based on Glycyrrhizinic acid by

using a titrimetry method.

Different topical gels were formulated

by using different cosolvents.

After standardizing of

topical preparations, the best

formulations (1% and 2%) were

studied in a double–blind clinical

trial in comparison with base gel

on atopic dermatitis over two

weeks (30 patients in each

group). Propylene glycol was

the best co-solvent for the

extract and Carbopol 940 as

gelling agent showed the best

results in final formulations. The

quantity of glycyrrhizinic acid

was determined 20.3% in the

extract and 19.6% in the topical

preparation. Two percent licorice

topical gel was more effective

than 1% in reducing the scores

for erythema, oedema and itching

over two weeks (p,0.05).

The results showed that licorice

extract could be considered as

an effective agent for treatment

of atopic dermatitis. (J Dermatol

Treat (2003) 14: 153–157)

Received 20 September 2002

Accepted 3 June 2003

Keywords: Atopic dermatitis — Glycyrrhiza glabra — Oedema —

Erythema — Itching


M. Saeedi, Faculty of Pharmacy, Taleghani Blvd., P.O.Box: 48175-861,

Sari, Iran; Tel/Faxz151-3243109. E-mail:

Journal of Dermatological Treatment (2003) 14, 153–157

# 2003 Journal of Dermatological Treatment. All rights reserved. ISSN 0954-6634 153

Materials and methods


The following chemicals were used as received from the

suppliers. Methyl and propyl paraben, propylene glycol,

PEG 200, PEG 300, PEG 400, isopropyl alcohol,

glycerin, triethanolamine, methanol, acetone, ethanol,

NaOH, NH3, formalin (Merck), Carbopol 940 (BF


Plant material

Glycyrrhiza glabra L. roots were collected from Shiraz, in

the south of Iran, in spring 2001. The dried roots were

powdered so that all the material could be passed

through a mesh size no larger than 0.5 mm.

Extraction procedure

Powdered roots (600 g) were macerated in 1 l of

methanol for one day, and the step was repeated

twice, following by filtration through filter paper. The

filtrate was evaporated to dryness under reduced

pressure and weighed (122 g, 20.33%).

Glycyrrhizic acid determination

The licorice extract (2 g) was stirred with 20 ml of 3%

HNO3 in acetone for 1 hour, then filtered and washed

with 10 ml of acetone. The residue was refluxed with

20 ml of acetone, filtered again, and this operation

repeated three times. The combined acetone extracts

were diluted to 100 ml, and washed down with 40 ml of

ethanol; 0.9 ml of 30% NH3 was added dropwise to the

mixture. Ammonium glycyrrhizate was filtered, washed

2–3 time with acetone (50ml total), and dissolved in

25 ml of water; 20 ml of formalin was added and after

1 min the mixture was titrated with 0.1 N NaOH in the

presence of phenolphthalein as indicator.13 This method

was also used for determination of glycyrrhizic acid in

licorice preparations. The assay was repeated three


Preparation of the formulations

PEG 200, 300, 400, isopropyl alcohol and propylene

glycol were used as co-solvent for dried extract and

propylene glycol was chosen as the best levigator.

Table I shows the constituents of the investigated

preparations. Carbopol 940 was dispersed in preserved

water (methyl paraben 0.18% and propyl paraben

0.02%) and glycerin overnight. The extract was

dissolved in propylene glycol and was added to the

polymer dispersion and stirred with a double bladed

mixer (Ika-werk, Germany) at 500 rpm for 10 min, and

neutralized by triethanolamine to pH 6.4 and then

mixed at 300 rpm for 10 min. The formulations were

stored at 4, 25, and 40C to ensure physical stability

evaluation for two weeks. Final formulations for the

clinical trial were controlled microbiologically based on


Clinical trial and statistical analysis

The study was a randomized (simple-random sampling),

double blind, prospective, placebo-controlled trial. The

primary endpoint of the clinical trial is severity in

oedema, itching and erythema. On the assumption of an

overall mean difference of 0.5 units and a standard

deviation of 0.5 units, 78 patients (26 in each group)

were required to achieve a power of 95% to reject a null

hypothesis of equality, applying a two-sided test at the

5% significance level. With an estimated fraction of 35%

of the patients being not evaluable, a total of 108

patients, aged over 15 years, with clinically diagnosed

mild to moderate degrees of atopic dermatitis (1.

pruritus and scratching, 2. course marked by exacerbation

and remissions, 3. lesions typical of eczematous

dermatitis, 4. personal or family history of atopy, 5.

clinical course lasting longer than 6 weeks) were

recruited.1 Before enrollment to the study, written

informed consent was obtained from all patients or

the parents of those under the age of 18 years. Patients

receiving systemic or topical steroids, antibiotics, or

Formulation* Composition % (w/w)



Carbopol Propylene



F1 1 0.30 10 5

F2 1 0.30 15 5

F3 1 0.30 20 5

F4 1 0.40 15 5

F5 1 0.40 20 5

F6 1 0.50 10 5

F7 1 0.50 15 5

F8 1 0.50 20 –

F9 1 0.50 20 5

F10 1 0.75 10 5

F11 1 0.75 15 5

F12 1 0.75 20 5

F13 1 1.00 10 5

F14 1 1.00 15 5

F15 1 1.00 20 5

F16 2 0.25 20 5

F17 2 0.50 20 5

F18 2 0.75 20 5

F19 2 1.00 20 5

Placebo – 0.50 20 5

*Each formulation consists of preserved water (propyl paraben

0.02%w/w and methyl paraben 0.18% w/w) to 100 g. The

formulations was neutralized by triethanolamine to pH=6.8.

Table I

Formulations composition

154 M Saeedi et al The treatment of atopic dermatitis

other effective topical therapy within the previous 7

days, pregnant women, nursing mothers, and patients

with other skin disorders were excluded. Lesions

location was classified as head and neck, trunk,

hands, and feet.

The topical preparations (1% and 2% licorice gels and

placebo) were administered to patients, in three groups,

three times a day for two weeks. The overall clinical

response was assessed by the investigator based on

effect on oedema, itching, erythema and scaling,

according to the following 4-point scale: absent=0,

mild=1, moderate=2, and severe=3. Follow up of

patients ceased after two weeks. ANOVA, followed by

Student-Newman-Keuls test, was used to determine

significant differences between groups and p,0.05 was

considered significant.14

Results and discussion

Licorice contains as its major active ingredient the

triterpene glycoside glycyrrhizin (also known as glycyrrhizic

or glycyrrhizinic acid) in concentrations ranging

from 1% to 24%, depending on sources and methods of

assay. Glycyrrhizin on hydrolysis yields glycyrrhetinic

(or glycyrrhetic) acid and two molecules of glucoronic

acid.8 Thus the standardization of licorice extract and its

preparations were performed by determination of glycyrrhizinic

acid. From the glycyrrhizic acid determination

conducted according to the previously described

method, the quantity of glycyrrhizic acid obtained was

20.3±0.81% and 19.6±0.74% in licorice extract and

licorice gel respectively. All investigated formulations in

the clinical trial used the criteria of USP microbial


On observing the clinical features of atopic dermatitis,

some of them showed resistance to topical steroids and

were even exacerbated by application of steroids, so it is

likely that long term topical use of steroids may

modulate the barrier-immunity function of the skin.

The present study compared the efficacy of up to two

weeks treatment with 1% and 2% licorice extract as a

herbal gel with placebo in patients with a clinical

diagnosis of atopic dermatitis.

A total of 108 patients were recruited in the present

study by a single investigator. 18 patients were

excluded from the efficacy analyses. Nine patients

were given systemic antibiotics, five patients were

pregnant, one patient was a nursing mother and

three patients were suffering from other skin disorders.

All of the 90 evaluable subjects complete two weeks

treatment. Table II shows patient characteristics in

several groups.

The assessment of the overall clinical responses,

relative to baseline, at the end of treatment after one

and two weeks is shown in Figure 1. Treatment with 1%

(F9) and 2% (F17) licorice gel resulted in a statistically

significant reduction in the scores for erythema after

two weeks (p,0.05). This effect was not observed for

1% extract gel after one week (pw0.05). The 2% licorice

gel showed more reduction in the scores for erythema

than 1% extract at the end of first and second weeks

(p,0.05). The licorice extract treatment was significantly

more effective than baseline in reducing the

scores for oedema and itching after one week (p,0.05)

and two weeks (p,0.01), and 2% licorice gel was more

effective than 1% extract at the end of first and second

weeks (p,0.05). Treatment with licorice extract was

not significantly effective in reducing the scores of

scaling (pw0.05). The effect of 1% and 2% licorice gel

in reducing in reducing the scores for erythema, oedema

and itching were significantly more than placebo after

one and two weeks (p,0.01).

Baseline evaluation showed that treatment groups

were well balanced in respect of number per group, age

and sex distribution, previous eczema treatment and

severity of signs and symptoms of eczema.

At the end of the treatments, the reduction of

erythema scores was 35.02% for 1% licorice extract

and 60.76% for 2% licorice gel. The reduction of

oedema scores was 56.64% and 83.76% for 1% and 2%

licorice gel treatment after two weeks respectively. At

the end of the treatments, the reduction of itching

scores was 44.1% and 72.53% for 1% and 2% licorice

gel respectively. A study carried out in 1994 reinforced

the excellent reputation of Glycyrrhiza glabra in atopic

dermatitis. Thirty-seven children were given a Chinese

herbal medicine containing licorice (and some other

plants) orally. After one year, 18 of the children had

experienced at least a 90% reduction in their symptoms.

6 Another study showed that topical steroids

exacerbated the dermatitis in about one third of the

patients15 but no side effects were observed in treatment

with licorice topical gel.

Licorice extract


Licorice extract




Mean 32.7 34.1 35.3

Range 16–51 16–49 17–53


Male 13 12 10

Female 17 18 20

Duration of eczema (years)

Mean 3.8 3.5 3.6

Range 0.01–25 0.01–21 0.01–25

Area of eczema

Head and neck 8 9 7

Trunk 3 2 2

Hands 18 19 19

Feet 1 – 2

Table II

The comparison of patient characteristics

M Saeedi et al The treatment of atopic dermatitis 155


Finally we would like to summarize the current approach

with regard to the management of atopic dermatitis. The

final goal of the treatment is to give patients the

opportunity for improved social activities in their daily

life. Skin care, control of pruritus and exclusion of the

exacerbating factors are three facets of the therapy and the

appropriate use of topical licorice preparations in considering

the patients’ response to this excellent therapeutic tool.

The use of 2% licorice extract gives satisfactory effects in

treatment of atopic dermatitis.


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3. Lane AT, Efficacy and safety of topical steroids in

pediatric atopic dermatitis. J. Eur. Acad. Dermatol.

Venerol. (1997) 8(suppl.): S24–S27.

Figure 1

Investigator assessment of overall clinical response, A: Erythema scores, B: Oedema scores, C: Scaling scores, D: Itching scores.

156 M Saeedi et al The treatment of atopic dermatitis

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