Charak Samhita

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|title=Charak Samhita
|title=Charak Samhita
|titlemode=append
|titlemode=append
|keywords= *Eranda, Ricinus communis L, Castor oil plant* Therapeutic use, herbs, researches on dravya, Charak Samhita, Dravyaguna, carakasamhitaonline, carakasamhita, caraka samhita, Ayurveda, Charak Samhita English translation, ancient Ayurveda text, Indian system of medicine, Ayurveda, Charak, Charaka Samhita, agnivesha, atreya, gopal basisht, yogesh deole, charak samhita wikipedia edition, charak samhita new edition, charaka samhita new edition, carak samhita new edition, caraka samhita new edition, research on charak samhita, text book charak samhita, fundamental principles of ayurveda, basic concepts of ayurveda,
|keywords= Eranda, Ricinus communis L, Castor oil plant, Therapeutic use, herbs, researches on dravya, Charak Samhita, Dravyaguna, carakasamhitaonline, carakasamhita, caraka samhita, Ayurveda, Charak Samhita English translation, ancient Ayurveda text, Indian system of medicine, Ayurveda, Charak, Charaka Samhita, agnivesha, atreya, gopal basisht, yogesh deole, charak samhita wikipedia edition, charak samhita new edition, charaka samhita new edition, carak samhita new edition, caraka samhita new edition, research on charak samhita, text book charak samhita, fundamental principles of ayurveda, basic concepts of ayurveda,
|description= Eranda (Ricinus communis L.) is traditionally classified as a premier vatahara (pacifying vata) and virechaka (purgative) herb, widely utilized in Ayurveda for managing vataraka (gout), abdominal colic, backache, and inflammatory joint disorders.
|description= Eranda (Ricinus communis L.) is traditionally classified as a premier vatahara (pacifying vata) and virechaka (purgative) herb, widely utilized in Ayurveda for managing vataraka (gout), abdominal colic, backache, and inflammatory joint disorders.
|image=http://www.carakasamhitaonline.com/resources/assets/ogimgs.jpg
|image=http://www.carakasamhitaonline.com/resources/assets/ogimgs.jpg
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'''[https://en.wikipedia.org/wiki/Ricinus_communis Ricinus communis L.]''', popularly known as '''Eranda''' or the '''Castor Oil Plant''', is a large, annual or perennial shrub distributed widely throughout tropical and subtropical regions. In [[Ayurveda]], it is highly revered as the prime drug for managing Vata disorders (*Vatavyadhi*), especially rheumatoid arthritis (*Amavata*), abdominal conditions, and as an ideal agent for therapeutic purgation (*Virechana*) and enema therapies.<ref name="API">Anonymous. The Ayurvedic Pharmacopoeia of India. Department of Ayush, Ministry of Health and Family Welfare, Govt. of India, New Delhi, Part I. 1986; Volume 1:23</ref>
'''[https://en.wikipedia.org/wiki/Ricinus_communis Ricinus communis L.]''', popularly known as '''Eranda''' or the '''Castor Oil Plant''', is a large, annual or perennial shrub distributed widely throughout tropical and subtropical regions. In [[Ayurveda]], it is highly revered as the prime drug for managing Vata disorders (''Vatavyadhi''), especially rheumatoid arthritis (''Amavata''), abdominal conditions, and as an ideal agent for therapeutic purgation (''Virechana'') and enema therapies.<ref name="API" />


== English Name ==
== English Name ==
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== Dose ==
== Dose ==
* '''Decoction (*Kwatha*):''' 20 – 30 ml of the drug.<ref name="API" />
* '''Decoction (''Kwatha''):''' 20 – 30 ml of the drug.<ref name="API" />


== Important Formulations ==
== Important Formulations ==
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== Major Phytoconstituents ==
== Major Phytoconstituents ==
The pharmacological efficacy of *Ricinus communis* seeds, oil, and roots is attributed to several secondary metabolites:
''Ricinus communis'' contains several classes of bioactive constituents.<ref name="Pandey2025" />
* '''Fatty Acids (Castor Oil):''' High concentration of ricinoleic acid (accounting for nearly 85-90% of the fatty acid profile), alongside oleic, linoleic, and stearic acid triglycerides.
* '''Fatty acids (castor oil):''' Ricinoleic acid, a hydroxylated fatty acid that is the principal component of castor oil.
* '''Toxic Proteins & Alkaloids:''' Ricin (a toxic lectin) and ricinine (an alkaloid), which are detoxified during traditional processing.
* '''Toxic proteins and alkaloids:''' Ricin (a toxic lectin) and ricinine (an alkaloid); ''Ricinus'' agglutinin is also present.
* '''Flavonoids & Terpenoids:''' Quercetin, gallic acid, and various glycosides present in root and leaf extracts.
* '''Phytosterols:''' Sitosterol, fucosterol and stigmasterol.


== Therapeutic Efficacy & Modern Scientific Research ==
== Therapeutic Efficacy &amp; Modern Scientific Research ==
Modern pharmacological investigations validate several traditional claims associated with *Ricinus communis*:
Modern pharmacological investigations have examined several traditional claims associated with ''Ricinus communis''. Each activity below is supported by one primary study. Most of the evidence is preclinical (animal and ''in vitro'' models).


=== 1. Purgative and Gastrointestinal Action (*Virechana*) ===
=== 1. Purgative and Gastrointestinal Action (''Virechana'') ===
* '''Traditional Use:''' Widely utilized as a safe and effective purgative and in managing abdominal conditions (*Udararoga*).
* '''Traditional Use:''' Widely used as an effective purgative and in managing abdominal conditions (''Udararoga'').
* '''Mechanism & Scientific Evidence:''' Ricinoleic acid released from castor oil hydrolysis in the small intestine stimulates intestinal smooth muscle contraction and inhibits fluid absorption, promoting rapid and smooth evacuation.<ref name="Tunaru2012">Tunaru, S., et al. "Castor oil induces laxative effect via epithelial receptor EP3 activation." Proceedings of the National Academy of Sciences.</ref>
* '''Scientific Evidence:''' Ricinoleic acid, released from castor oil by intestinal lipases, selectively activates EP3 prostanoid receptors on intestinal smooth muscle; in mice lacking EP3 receptors on smooth-muscle cells, castor oil produced no laxative effect, establishing the mechanism of its purgative action. The same pathway mediates uterine contraction.<ref name="Tunaru2012" />


=== 2. Anti-inflammatory and Anti-arthritic Activity (*Amavata*) ===
=== 2. Anti-inflammatory and Free-radical Scavenging Activity (''Sotha'' / ''Amavata'') ===
* '''Traditional Use:''' Indicated in *Amavata* (rheumatoid arthritis), swelling (*Sotha*), and localized pain.
* '''Traditional Use:''' ''Amavata'' (rheumatoid arthritis), ''Sotha'' (swelling) and localized pain; the root is used in ''Vatavyadhi''.
* '''Mechanism & Scientific Evidence:''' Root and oil extracts demonstrate significant anti-inflammatory activity in acute and chronic models by inhibiting cyclooxygenase pathways, reducing edema, and alleviating joint discomfort.<ref name="Shojaii2012">Shojaii, A., et al. "Review of pharmacological properties and chemical constituents of Ricinus communis." International Journal of Pharmacy and Pharmaceutical Sciences.</ref>
* '''Scientific Evidence:''' Root extract showed anti-inflammatory activity in rats together with free-radical scavenging activity, supporting the traditional use of the root in inflammatory conditions.<ref name="Ilavarasan2006" />


=== 3. Wound Healing and Antimicrobial Efficacy ===
=== 3. Antimicrobial Activity ===
* '''Traditional Use:''' Applied topically for skin ulcers and localized infections.
* '''Traditional Use:''' Leaves applied as poultice or fomentation on sores, boils and swellings; used for wound and skin infections.
* '''Mechanism & Scientific Evidence:''' Seed and leaf extracts exhibit potent antimicrobial activity against common pathogens while enhancing dermal collagen synthesis and wound contraction metrics.<ref name="Perumal2015">Perumal, P., et al. "Wound healing and antimicrobial properties of Ricinus communis leaf extracts." Journal of Ethnopharmacology.</ref>
* '''Scientific Evidence:''' Aqueous, methanol, ethanol, petroleum ether and ethyl acetate extracts of the leaves inhibited ''Escherichia coli'', ''Staphylococcus aureus'', ''Pseudomonas aeruginosa'', ''Klebsiella pneumoniae'' and ''Candida albicans'' ''in vitro'' (MIC 3.13–25.0 mg/ml); the methanol extract showed the largest zones of inhibition.<ref name="Suurbaar2017" />
 
=== 4. Anti-diabetic Activity ===
* '''Traditional Use:''' Not a classical indication; reported in experimental research.
* '''Scientific Evidence:''' A 50% ethanolic extract of the seeds showed favourable effects on fasting blood glucose, lipid profile and liver and kidney function in diabetic rats.<ref name="Shokeen2008" />


== Summary of Therapeutic Profile ==
== Summary of Therapeutic Profile ==
{| class="wikitable sortable" style="text-align: left;"
{| class="wikitable sortable" style="text-align: left;"
|+ Therapeutic Applications of *Ricinus communis*
|+ Therapeutic Applications of ''Ricinus communis''
! Indication
! Indication
! Active Biomolecules
! Part / Extract studied
! Primary Pharmacological Action
! Primary Pharmacological Action
! Level of evidence
|-
| '''Constipation &amp; Bowel Cleansing (''Virechana'')'''
| Castor oil (ricinoleic acid)
| Laxative via EP3 receptor activation
| Preclinical (mouse)
|-
|-
| '''Constipation & Bowel Cleansing (*Virechana*)'''
| '''Rheumatoid Arthritis / Swelling (''Amavata'' / ''Sotha'')'''
| Ricinoleic acid triglycerides
| Root extract
| Intestinal smooth muscle stimulant, Laxative
| Anti-inflammatory, free-radical scavenging
| Preclinical (animal, ''in vitro'')
|-
|-
| '''Rheumatoid Arthritis (*Amavata* / *Sotha*)'''
| '''Wounds &amp; Skin Infections'''
| Ricinoleic acid, Flavonoids
| Leaf extracts
| Anti-inflammatory, Analgesic
| Antibacterial, antifungal
| ''In vitro''
|-
|-
| '''Wounds & Skin Irritation'''
| '''Diabetes'''
| Phenolic principles, Tannins
| Seed ethanolic extract
| Antimicrobial, Dermal wound contraction
| Anti-hyperglycemic
| Preclinical (animal)
|}
|}


== Safety, Toxicity, and Dosage ==
== Safety, Toxicity, and Dosage ==
* '''Precautions:''' Raw seeds contain toxic proteins (ricin) and must not be consumed unprocessed; standard therapeutic use relies on processed castor oil or purified root decoctions under professional guidance.
* '''Precautions:''' Raw seeds contain the toxic protein ricin and must not be consumed unprocessed; ricin poisoning has no specific antidote, and castor oil itself is not a source of ricin. Standard therapeutic use relies on processed castor oil or purified root decoctions under professional guidance.<ref name="Audi2005" />
* '''Standard Therapeutic Dosage:'''  
* '''Standard Therapeutic Dosage:'''  
** ''Root Decoction (*Kwatha*):'' 20–30 ml.<ref name="API" />
** ''Root Decoction (''Kwatha''):'' 20–30 ml.<ref name="API" />
** ''Castor Oil (*Taila*):'' 5–15 ml as directed for purgation.
** ''Castor Oil (''Taila''):'' 5–15 ml as directed for purgation.


== References ==
== References ==
{{Reflist|refs=
{{Reflist|refs=
<ref name="API">Anonymous. The Ayurvedic Pharmacopoeia of India. Department of Ayush, Ministry of Health and Family Welfare, Govt. of India, New Delhi, Part I. 1986; Volume 1:23</ref>
<ref name="API">Anonymous. The Ayurvedic Pharmacopoeia of India. Department of Ayush, Ministry of Health and Family Welfare, Govt. of India, New Delhi, Part I. 1986; Volume 1:23</ref>
<ref name="Tunaru2012">Tunaru, S., et al. "Castor oil induces laxative effect via epithelial receptor EP3 activation." Proceedings of the National Academy of Sciences.</ref>
<ref name="Pandey2025">Pandey SN, Kumar P, Verma H, Durgapal S, Singh B. Phytopharmacological insights into ''Ricinus communis'': a comprehensive overview. Pharmacogn Res. 2025;17(2):348-57. doi:10.5530/pres.20251940.</ref>
<ref name="Shojaii2012">Shojaii, A., et al. "Review of pharmacological properties and chemical constituents of Ricinus communis." International Journal of Pharmacy and Pharmaceutical Sciences.</ref>
<ref name="Tunaru2012">Tunaru S, Althoff TF, Nüsing RM, Diener M, Offermanns S. Castor oil induces laxation and uterus contraction via ricinoleic acid activating prostaglandin EP3 receptors. Proc Natl Acad Sci U S A. 2012;109(23):9179-84. doi:10.1073/pnas.1201627109.</ref>
<ref name="Perumal2015">Perumal, P., et al. "Wound healing and antimicrobial properties of Ricinus communis leaf extracts." Journal of Ethnopharmacology.</ref>
<ref name="Ilavarasan2006">Ilavarasan R, Mallika M, Venkataraman S. Anti-inflammatory and free radical scavenging activity of ''Ricinus communis'' root extract. J Ethnopharmacol. 2006;103(3):478-80.</ref>
<ref name="Suurbaar2017">Suurbaar J, Mosobil R, Donkor AM. Antibacterial and antifungal activities and phytochemical profile of leaf extract from different extractants of ''Ricinus communis'' against selected pathogens. BMC Res Notes. 2017;10:660. doi:10.1186/s13104-017-3001-2.</ref>
<ref name="Shokeen2008">Shokeen P, Anand P, Murali YK, Tandon V. Antidiabetic activity of 50% ethanolic extract of ''Ricinus communis'' and its purified fractions. Food Chem Toxicol. 2008;46(11):3458-66.</ref>
<ref name="Audi2005">Audi J, Belson M, Patel M, Schier J, Osterloh J. Ricin poisoning: a comprehensive review. JAMA. 2005;294(18):2342-51. doi:10.1001/jama.294.18.2342.</ref>
}}
}}


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