LAISHA · DRAVYAGUNA

Vatsanabha

वत्सनाभ

Aconitum ferox Wall. ex Ser.

Ranunculaceae · Aconitum

Benefits & side effects

TRADITIONAL VIEW, WITH SAFETY LIMITS

Hindi name: Bachnag

What the texts say Vatsanabha does

What the evidence says. Traditional use is extensive and long recorded. Modern clinical evidence is limited.

Side effects and limits

Avoid or ask first: Self-treatment, absolutely and without exception.; Pregnancy and breastfeeding.; Children.; and more below.

A traditional classification, not a recommendation. The full safety record is below.

Photographs

Matra and anupana

AS THE CLASSICAL TEXTS AND THE API PRESCRIBE

Shodhita churna15–30 mg (roughly 1/8 to 1/4 ratti), specialist use only
AnupanaMadhu · Ghrita

The mahavisha. Only after proper shodhana, only inside a classical yoga such as Tribhuvana Kirti or Anandabhairava rasa, and it is Schedule E(1) in India. Aconitine is fatal at milligram quantities.

Reported from Sharangadhara Samhita and the Ayurvedic Pharmacopoeia of India. Laisha states what the texts prescribe; it does not recommend. No quantity here is adjusted for a particular person — not for agni, koshtha, bala, age, pregnancy, kidney or liver function, or anything already being taken.

Rasapanchaka

Rasa
Madhura
Guna
LaghuRukshaTikshnaVyavayiVikasi
ViryaUshna
VipakaMadhura
PrabhavaThe texts treat vatsanabha as yogavahi — it carries other dravya with it — and this, with its speed, is why it appears in so many rasa formulations despite being a poison.
DoshakarmaKaphavatahara.

Described as madhura after shodhana, with ushna virya and madhura vipaka. The raw root is not characterised by rasa in the texts because it is not a thing to taste.

Karma and part used

JwaraghnaVedanasthapanaDeepanaYogavahiShoolaprashamana

These are the actions the classical texts record. They are statements about what the tradition holds, and this library does not restate them as findings about a human body.

Upayukta angaMula kanda (the tuber), and only after shodhana
Why it mattersThe tuber is the article, and it is never used raw. Shodhana — the specified purification, classically by boiling in cow's urine or in milk for a stated time — is not a refinement but the difference between a medicine and a poison. An entry that named the part without naming the process would be describing how to harm someone.

Paryaya

VishaGaralaAmritaShringikaVatsanabhi

The first paryaya is simply Visha, poison. Amrita, nectar, sits beside it in the same list — the tradition's own way of saying that what the process does to this root decides which of the two it is.

Names, by language

EnglishIndian aconite
SinhalaWasanavi
NepaliBikh
HindiBachnag
KannadaVasanabhi
TamilVasanavi
TeluguVasanabhi
MalayalamVatsanabhi
MarathiBachnag
GujaratiVachnag
BengaliKathbish
PunjabiBachnag
OdiaBachhanaga
UrduBish

Classical references

Sushruta Samhita
Kalpasthana, the chapters on poisons
Vatsanabha is described among the sthavara visha, the plant poisons, with the signs of poisoning by it.
Rasatarangini
The chapter on visha dravya
Gives the shodhana procedures for vatsanabha and the quantities permitted after them.
Bhavaprakasha Nighantu
Dhatvadi Varga
Describes vatsanabha among the poisons and their purification.

Rasa, guna, virya, vipaka and karma are recorded as the classical texts give them, with the text and section named so a student can open the book and check. Where an exact chapter and verse could not be confirmed, this library names the section rather than inventing a number.

Formulations it appears in

Tribhuvana Kirti RasaPurified vatsanabha is among the dravya.
Anandabhairava RasaPurified vatsanabha is among the dravya.
Mrityunjaya RasaPurified vatsanabha is among the dravya.

Adulterants and substitutes

Other Aconitum species are collected and sold as vatsanabha, and they differ in alkaloid content and in how much shodhana they need — which makes substitution here a life-safety problem and not a quality one. Ativisha, Aconitum heterophyllum, is a different plant of the same genus that is NOT a poison and is used freely; confusing the two in either direction is dangerous, in one direction because a poison is used as a safe herb, and in the other because an effective herb is subjected to unnecessary processing.

Identity

Matched live against the GBIF backbone on 28 September 2026 at 99 per cent confidence. This is the first of the sthavara visha — the plant poisons — and Ayurveda classes it as a poison outright rather than as a herb with cautions. Everything in this entry follows from that.

A WAY TO REMEMBER IT

Aconitum, the classical monkshood. Ferox means fierce. Of all the epithets in this library, this is the one to take literally.

What the tradition holds

Vatsanabha is described in the Sushruta Samhita among the plant poisons, and the Rasatarangini gives its shodhana. That is what the tradition holds and where it is written down, not a finding about what the root does in a body.

Constituents. The tuber carries diterpenoid alkaloids, chiefly aconitine and its relatives. Aconitine acts on the sodium channels of heart and nerve, which is the mechanism behind both its use and its lethality.

What the evidence says

StatusTraditional use is extensive and long recorded. Modern clinical evidence is limited.
SuggestedNo claim of established clinical effect is made here. What is documented in the modern literature about this plant is overwhelmingly about poisoning, not treatment, and that is stated in the safety section rather than here.
Not establishedThere is not enough good clinical evidence to establish an effect on any named health condition. Long traditional use is not a substitute for that evidence, and this library does not present it as one.
The honest gapAlkaloid content varies with species, altitude and season, and the reduction achieved by shodhana varies with how exactly it was done. Neither is knowable without assay, which is the practical reason this dravya belongs only with a qualified practitioner.

Safety

This is a deadly poison and this library will not present it as anything else. Aconitine is among the most toxic plant compounds known: a few milligrams can kill an adult, death can follow within hours from heart rhythm failure, and there is no specific antidote. Aconite poisoning is a recurring cause of fatal herbal poisoning worldwide, and it happens most often through wrongly prepared or wrongly identified material. Raw vatsanabha is lethal. Properly purified vatsanabha is a prescription-level medicine that belongs solely in the hands of a qualified practitioner who knows the shodhana was done and by whom. No quantity of this dravya is appropriate for self-treatment, ever, in any form. Anyone who suspects aconite poisoning needs emergency hospital care immediately, not a herbal remedy.

Side effectsTingling and numbness of the mouth and tongue — this is an early sign of poisoning, not a side effect to tolerate
Nausea and vomiting
Palpitations
ContraindicationsSelf-treatment, absolutely and without exception.
Pregnancy and breastfeeding.
Children.
Heart disease of any kind.
Any use of raw or unpurified material, by anyone.
InteractionsAconitine is cardiotoxic and neurotoxic at milligram quantities. Anything affecting cardiac conduction — digoxin, beta blockers, calcium channel blockers, antiarrhythmics — compounds the risk.
Used only after proper shodhana, only within a classical formulation, and it is Schedule E(1) in India.
Pregnancy and breastfeedingNot to be used in pregnancy or breastfeeding in any quantity or form.
Aconitine is lethal in milligram quantitiesA few milligrams of aconitine can kill an adult. Death follows from ventricular arrhythmia, often within hours, and there is no specific antidote. Tingling of the mouth and tongue is the characteristic early sign and means emergency care, not a lower dose.
Unpurified or misidentified material kills peopleFatal aconite poisoning is documented repeatedly in the medical literature and arises most often from inadequate shodhana or from the wrong Aconitum species. The classical purification exists precisely because the raw root is lethal.

Growing it

ClimateAlpine Himalaya, roughly 3000 to 4500 metres.
SoilMoist, humus-rich alpine ground.
PlantingA perennial grown from tubers or seed. Collection from the wild is under pressure and several Himalayan Aconitum species are assessed as threatened.
HarvestTubers are lifted in autumn and dried. They are a poison from the moment they leave the ground and are handled as one.
What is not statedSeveral Himalayan Aconitum species are under collection pressure and are assessed as threatened. Cultivated material should be preferred where it can be had.

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What this is not

Sources

GBIF Backbone Taxonomy species-match record for Aconitum ferox Wall. ex Ser.
Global Biodiversity Information Facility (GBIF) · read 2026-09-28
Confirming live, rather than from memory, the accepted botanical name and family behind the Sanskrit name.
https://api.gbif.org/v1/species/match?name=Aconitum%20ferox%20Wall.%20ex%20Ser.
The Ayurvedic Pharmacopoeia of India — Vatsanabha (Aconitum ferox Wall. ex Ser.)
Pharmacopoeia Commission for Indian Medicine and Homoeopathy, Ministry of Ayush, Government of India · read 2026-09-28
The official Indian pharmacopoeial standing of the dravya and the identity of the part used as the pharmacopoeial article.
https://pcimh.gov.in/
Compendium of Monographs — Natural Health Products
Health Canada, Natural and Non-prescription Health Products Directorate · read 2026-09-28
A regulator outside India that publishes monographs covering Ayurvedic ingredients — used for the safety framing, and for the line between a permitted traditional-use claim and clinical evidence.
https://www.canada.ca/en/health-canada/services/drugs-health-products/natural-non-prescription/applications-submissions/product-licensing/compendium-monographs.html
Classical matra by dose form
Sharangadhara Samhita, Madhyama Khanda
The classical quantity for each dose form, as the standard reference gives it. Sharangadhara is where Ayurveda's dose forms and their measures are set out, and it is what every Dravyaguna textbook reproduces.
https://niimh.nic.in/ebooks/esharangadhara/
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