Photo: Danny Steven S. / Wikimedia Commons, CC BY-SA 3.0
Eranda एरण्ड
Ricinus communis · Euphorbiaceae
Also known as: Castor, Panchangula, Andi, Erand, Erandmool, Erand Oil, Erand Mul
Part used: Seed, root
Eranda (Ricinus communis) is the castor plant, whose oil is Ayurveda's principal purgative and its foremost Vata-pacifying drug. It is used for constipation, arthritis, sciatica and abdominal complaints. The oil is safe when properly extracted, but the raw seed contains ricin and is genuinely dangerous.
| Rasa (taste) | Tikta (Bitter), Kashaya (Astringent) |
|---|---|
| Guna (qualities) | Laghu (Light), Ruksha (Dry) |
| Virya (potency) | Ushna (Hot) |
| Vipaka | Katu (Pungent) |
| Dosha | Balances Kapha & Vata |
| Prabhava | Classical systemic action |
Key takeaways
- Botanical name: Ricinus communis
- Part used: Seed, root
- Dosha action: Balances Kapha & Vata
- Typical dose: Castor oil 5–10 ml as laxative; root decoction in joint formulas.
Eranda in other languages
Introduction
Eranda (castor, Ricinus communis) is a foremost Vata-pacifying plant — its oil is a classical laxative and its root a key ingredient for arthritis and Vata disorders. Warming and unctuous, it lubricates and mobilises.
Classification
Of the Euphorbiaceae family, Eranda is grouped among the Vata-hara and Virechana (purgative) dravyas. Its heavy-unctuous qualities and heating potency clear Vata-Kapha and mobilise Ama downward.
Uses & benefits
Castor is the classical Vata drug and Ayurveda's most-used purgative. The oil is given in constipation and, in larger classical doses, for Virechana; the root is a principal ingredient of the Vata decoctions used in arthritis, sciatica and lumbar pain. It is applied externally to swollen, painful joints.
Eranda for constipation
Castor oil is the classical Virechana drug — reliable, fast and used where a bulk laxative has failed.
Eranda for arthritis
Named as the foremost Vatahara drug. Used in Amavata and rheumatoid conditions, taken in small doses with warm water or milk.
Eranda for sciatica
A classical Gridhrasi drug, its purgative and Vata-pacifying actions used together.
Eranda as a massage oil
Applied warm over painful joints and the lower back, and used in Basti preparations.
Eranda for abdominal swelling
Used in Udara-roga, where purgation is the classical route.
Eranda leaf externally
The warmed leaf is bound over painful, swollen joints — a widespread domestic practice.
Eranda for lactation
The leaf poultice is traditionally applied to the breast to encourage milk flow.
Eranda in Panchakarma
The standard drug for therapeutic purgation and a base for many Basti preparations.
Eranda for worms
Used to expel intestinal parasites through its purgative action.
Eranda for skin
The oil is applied in dry skin conditions and used in classical wound and hair preparations.
Dosage — how much to take
Castor oil 5–10 ml as laxative; root decoction in joint formulas. Follow your Vaidya's advice.
Dosage varies with age, constitution and condition — confirm with a qualified Vaidya.
Traditional uses — questions answered from the classical texts
Answers are drawn from the citations and properties recorded for this drug. No chapter-and-verse reference appears that the record does not carry.
Which classical texts describe Eranda?
The citations held for Eranda in this catalogue are: Charaka Samhita (Vata-hara & Virechana); Bhavaprakasha Nighantu (Guduchyadi Varga).
What does the Charaka Samhita record about Eranda?
Cited as chief among Vata-pacifying and purgative herbs. Reference: Charaka Samhita — Vata-hara & Virechana.
What does the Bhavaprakasha Nighantu record about Eranda?
Described as Vata-hara. Reference: Bhavaprakasha Nighantu — Guduchyadi Varga.
What is Eranda traditionally used for in Ayurveda?
Castor is the classical Vata drug and Ayurveda's most-used purgative. The oil is given in constipation and, in larger classical doses, for Virechana; the root is a principal ingredient of the Vata decoctions used in arthritis, sciatica and lumbar pain. It is applied externally to swollen, painful joints.
What are the Ayurvedic properties of Eranda?
Rasa Tikta (Bitter), Kashaya (Astringent), Guna Laghu (Light), Ruksha (Dry), Virya Ushna (Hot), Vipaka Katu (Pungent). Dosha action: Balances Kapha & Vata. Prabhava: Classical systemic action.
Why is Eranda classified the way it is?
In dravya-guna a drug's dosha action follows from its taste, qualities, potency and post-digestive effect. Eranda carries Ushna (Hot) virya and Katu (Pungent) vipaka, which together give the recorded action: Balances Kapha & Vata.
Which part of Eranda is used medicinally?
The part used is Seed, root.
How much Eranda is taken, and how?
Castor oil 5–10 ml as laxative; root decoction in joint formulas. Follow your Vaidya's advice. Dosage varies with age, constitution and condition — confirm it with a qualified Vaidya.
When should Eranda be avoided?
Castor oil is a laxative — use in appropriate doses. Avoid in pregnancy and acute abdominal conditions.
Where does Eranda grow?
Castor is a fast-growing shrub of waste ground and cultivation across India and the tropics.
Classical references
- Charaka Samhita — Vata-hara & Virechana
Cited as chief among Vata-pacifying and purgative herbs. - Bhavaprakash Nighantu — Guduchyadi Varga
Described as Vata-hara.
Modern research
-
Analgesic and Anti-inflammatory Potential of Ricinus communis Linn.: Evidence from Pharmacology to Clinical Studies
(see source). Current Pharmacology Reports (2023)
A review documenting the analgesic and anti-inflammatory potential of Ricinus communis (Eranda / castor), driven by ricinoleic acid, alongside its laxative action.
View study doi:10.1007/s40495-023-00347-7
Safety & precautions
Castor oil is a laxative — use in appropriate doses. Avoid in pregnancy and acute abdominal conditions.
Where it grows
Castor is a fast-growing shrub of waste ground and cultivation across India and the tropics.
Frequently asked questions
What is castor oil used for in Ayurveda?
Eranda is the classical purgative and the foremost Vata-pacifying drug. It is used for constipation, arthritis, sciatica, abdominal swelling and worms, taken internally in small doses and applied externally over painful joints.
What is the dose of castor oil?
For constipation, 5–10 ml at night with warm water or milk. For Vata conditions, smaller doses of 3–5 ml. For formal therapeutic purgation the dose is set by a physician and given under supervision.
Is castor oil safe?
The properly extracted oil is safe and has a very long record of use. The raw seed is not — it contains ricin, one of the most toxic substances known, and chewing a few seeds can kill. Only ever use the pressed oil from a licensed source.
Who should not take castor oil?
Avoid in pregnancy — it stimulates the uterus and has been used to induce labour. Avoid with bowel obstruction, inflammatory bowel disease, appendicitis or unexplained abdominal pain. Not for prolonged or habitual use.
Why is Eranda called the best Vata drug?
Because it addresses Vata by both routes the texts recognise: it moves the bowel downward, which is where Vata accumulates, and it is unctuous and warming, which is the direct antidote to Vata's dry, cold quality.
Can castor oil be applied to joints?
Yes. Warm castor oil applied over painful joints and the lower back is standard practice, often with a warm compress after. This external use carries none of the cautions attached to taking it internally.
Does castor oil help hair growth?
It is widely used in hair oils and is genuinely conditioning and lubricating for dry hair and scalp. Evidence that it makes hair grow is weak — treat it as a conditioner rather than a treatment for hair loss.
