Agada Tantra, Vyavahara Ayurveda evam Vidhi Vaidyaka अगद तन्त्र, व्यवहार आयुर्वेद एवं विधि वैद्यक
Toxicology, medical jurisprudence and forensic medicine · Second Professional (Dwitiya Varsha) · AyUG-AT
2papers
12units
60practice questions
10study sections
Poisons — plant, animal, mineral and modern — and the law a practitioner works under. Where the Ayurvedic visha framework meets the Indian legal system.
Papers
Paper I — Agada Tantra
Paper II — Vyavahara Ayurveda evam Vidhi Vaidyaka
Units in this subject
Visha — definition, classification, propertiesSthavara visha — plant and mineral poisonsJangama visha — animal poisons and bitesKritrima and GaravishaDooshi vishaVisha chikitsa — the 24 upakramaSnake bite, scorpion sting, insect bitesModern toxicology and antidotesMedical jurisprudence, consent, negligenceForensic medicine: identification, injury, deathActs relevant to practiceEthics and the practitioner's duties
Study notes
Agada Tantra is one of the eight branches of Ashtanga Ayurveda and the only one that is simultaneously a clinical subject and a legal one. Half the paper is poisons; the other half is the law a practitioner works under, and the two halves are examined together because a poisoning is where medicine and the courts meet.
Visha — definition and properties
Visha is that which, on entering the body, causes vishada (distress). The word itself carries the meaning.
The ten gunas of visha: laghu, ruksha, ashu, vishada, vyavayi, tikshna, vikasi, sukshma, ushna, apaki. Guru is NOT among them — a poison acts fast because it is laghu and sukshma.
Vega — the stages of poisoning. Sushruta describes seven vega, Charaka eight. Say which text you are quoting.
Classification: Sthavara (plant, mineral), Jangama (animal), Kritrima (artificial combination), Gara (deliberately administered slow poison), Dooshi (residual poison of reduced potency that acts later).
Sthavara visha — the plant poisons
Vatsanabha (Aconitum ferox): aconitine. Lethal in milligrams. Perioral and lingual tingling is the early sign; death follows from ventricular arrhythmia. No specific antidote. Its first paryaya is simply Visha and its second is Amrita — the tradition saying that shodhana decides which.
Langali (Gloriosa superba): colchicine. One tuber can kill an adult. Poisoning is DELAYED — vomiting, an apparent recovery, then multi-organ failure and marrow collapse over days. Among the leading causes of fatal plant poisoning in south India and Sri Lanka. Paryaya: Garbhapatani.
Gunja (Abrus precatorius): abrin, of the ricin class. One chewed seed can kill. The hard coat is why an intact swallowed seed usually passes. Children are poisoned because the scarlet seed is strung as jewellery.
Karavira (Nerium oleander): oleandrin, a cardiac glycoside acting like digoxin. Paryaya Ashvamaraka — horse-killer. Poisoning recorded from honey, from smoke, and from water cuttings stood in.
Arka (Calotropis) latex: cardenolides, and it causes keratitis and lasting visual loss when splashed in the eye. Snuhi (Euphorbia) latex does the same.
Kupilu (Strychnos nux-vomica): strychnine. Convulsions with retained consciousness and opisthotonus.
Damsha lakshana per type, and the four-fold site of the bite.
Modern correlate: cobra and krait venom is chiefly neurotoxic, viper venom chiefly haemotoxic. Polyvalent antivenom is the treatment and delay for a herbal remedy causes deaths.
Scorpion, spider, insect and rabid animal bites are also part of this unit.
Visha chikitsa — the twenty-four upakrama
The classical sequence: Mantra, Arishta bandhana, Utkartana, Nishpidana, Chushana, Agni karma, Parisheka, Avagaha, Raktamokshana, Vamana, Virechana, Upadhana, Hridayavarana, Anjana, Nasya, Dhuma, Lepa, Pradeha, Mrita sanjeevana, Sanjna sthapana, Prativisha, Sanshamana, Shodhana and Lakshanika chikitsa — twenty-four. Counts and the last few entries differ between recensions, so cite the edition you are quoting.
Know the first three and the logic: they are what could be done at the site, before any drug.
Vishaghna dravya: Shirisha heads the group. But the modern point must be said in any answer — snakebite and poisoning are emergencies needing hospital care and antivenom, and the classical vishaghna standing is a record of what the texts say, not a treatment plan.
Corrosives: do NOT induce emesis and do not neutralise.
Gastric lavage, activated charcoal and their contraindications.
Heavy metals: lead, mercury, arsenic. Relevant here because Ayurvedic formulations containing bhasma have been the subject of heavy-metal findings, and because Haridra is adulterated with lead chromate.
Vyavahara Ayurveda and Vidhi Vaidyaka
Consent: informed, free, and by a competent person. Written consent is evidence of consent, not consent itself.
Negligence and the standard of care; Death by a rash or negligent act: formerly IPC Section 304A, now Bharatiya Nyaya Sanhita 2023 Section 106, in force from 1 July 2024, which additionally provides a lower maximum for a registered medical practitioner acting in the course of treatment. Older textbooks still say 304A.
Identification: age from teeth and bones, sex, stature, scars, tattoos, dactylography.
Death: modes, signs, cooling, rigor mortis (roughly 1–2 hours onset, 12 hours to establish, 12 to persist, 12 to pass), postmortem lividity, putrefaction.
Injuries: abrasion, contusion, laceration, incised, stab, firearm. Antemortem versus postmortem is decided by vital reaction.
Acts: the Drugs and Cosmetics Act 1940 and its rules for ASU drugs; the Consumer Protection Act; the Medical Termination of Pregnancy Act; the PCPNDT Act; the NCISM Act.
Kritrima and Garavisha
Kritrima visha: made by combining substances that are not individually poisonous.
Gara visha: deliberately administered, slow-acting, and the classical account of chronic poisoning. Its symptoms are described as gradual wasting and discoloration.
Both are distinguished from Dooshi visha, which is residual rather than administered.
Forensically, garavisha is the classical counterpart of chronic criminal poisoning, and the modern parallel is heavy-metal or arsenic poisoning.
Snake bite, scorpion sting, insect bites
Snake: local swelling, bleeding and necrosis suggest viper; ptosis, dysphagia and respiratory failure suggest cobra or krait.
Immediate management: immobilise, keep the limb below heart level, transport. Do NOT incise, suck, apply a tight tourniquet or attempt to catch the snake.
Antivenom is the treatment. Delay for a herbal remedy causes deaths, and this must be said in any answer.
Scorpion: prazosin is the mainstay in Indian practice. Insect and spider bites are largely supportive.
Where the texts disagree
The count of visha guna is ten in Sushruta; other texts give slightly different lists.
The seven vega of visha are Sushruta's; Vagbhata gives eight in some recensions.
The classification of the upavisha is post-Samhita and the lists differ between the Rasa texts.
Commonly confused
Sthavara (immobile) and Jangama (mobile) visha.
Gara visha (a compounded poison) and Dushi visha (a weakened residual one).
Darvikara, Mandali and Rajimanta - three snake types, three dosha.
Visha (poison) and Upavisha (the lesser poisons, usable after shodhana).
Toxicology moves. Antidote protocols and legal provisions are amended, so always check the current national protocol and the current Act. The plant poisons named here each have a full entry in Laisha's library with their documented toxicity and sources.
Grounded in Laisha's own dravya library for every plant poison named here — vatsanabha, langali, gunja, karavira, bhallataka, arka and snuhi each have a full entry with its documented toxicity, and the explanations link to it. The legal and forensic questions follow the Indian statutes as they stand; always check your own university's syllabus for which Acts are examinable.
Practise it, and prove it
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