Datura: Ancient Ayurveda and Forensic Toxicology

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 Datura: Ancient Ayurveda and Forensic Toxicology

Category: Agadtantra (Toxicology)

Bams 2 nd year

Dhatura

Commonly known as the Devil’s Trumpet, Thorn Apple, or Jimsonweed.

Datura is a plant that commands both respect and caution. In the realm of Agadtantra (Ayurvedic Toxicology), it is classified as an Upavisha .. a substance that is poisonous but can be transformed into a potent medicine through specific purification processes. However, in modern medicine, it is feared as a dangerous cerebral deliriant poison capable of causing profound disorientation and death .

INTRODUCTION

  • Latin Name: Datura metel (and varieties like alba, nigar, stramonium)  
  • Family: Solanaceae  

Common Names:  

  • English: Thorn Apple  
  • Sanskrit: कंटकफला, उन्मत, शिवप्रिया  
  • Hindi/Marathi: धतूरा / धोत्रा  

Classification:  

Ayurvedic: Sthavara Vegetative Poison (Upavisha)  

Modern: Cerebral Delirient Poison  

रस पंचक (Rasa Panchaka)

  • रस:- मधुर, कटु, कषाय, तिक्त.
  • गुणः- तिक्त, रुक्ष, गुरु.
  • वीर्यः- उष्न
  • विपाकः- कटु  
  •  प्रभाव :- मदकारी , ज्वरघ्न

BOTANICAL DESCRIPTION

  • Plant: 1-2 meters long.  
  • Leaves: Triangular apex, 6-7 cm long.  
  • Flowers: Bell-shaped, white or bluish, 8-17 cm long.  
  • Fruit: Round, 4 cm diameter, covered with spines (Thorn apple).  
  • Seeds: 450-500 yellowish-brown seeds per fruit, resembling chili seeds.  

DIFFERENCE BETWEEN CHILLI & DATURA SEEDS

FATALITIES & PRINCIPLES

Toxic Part: Phala (Fruit) and beej (Seeds).  

Fatal Dose: 100-125 seeds.  

Alkaloids: 60 mg (Adults), 4 mg (Children).  

Fatal Period: Approximately 24 hours.  

ACTIVE PRINCIPLES

  1. Hyoscine (scopolamine)  
  2. Hyoscyamine  
  3. Atropine  

USES

  1. Mydriate (inophthalmic practice)  
  2. Antispasmodic  
  3. Antidote (for organophosphates and carbamates)  
  4. Pre-anaesthetic medication (to inhibit salivation and dry up respiratory secretions)  
  5. Bronchial asthma (not recommended now-a-days)  

MODE OF ACTION

Peripheral effects are predominant and result from anticholinergic (parasympatholytic) action.  

Central effects involve initial stimulation of the CNS, with excitement and restlessness followed by subsequent depression delirium and coma. 

Sign and Symptoms

  • Dryness of mouth
  • Thirst (varying intensity)
  • Dilated pupils
  • Dry and hot skin
  • Vomiting, confusion, restlessness, delirium
  • Delirium, drowsiness
  • Death

CLINICAL FEATURES

Hot like a Hare: High fever (up to 107°F).  

Red like a Beet: Flushing of the face and skin.  

Blind like a Bat: Dilated pupils (Mydriasis), loss of vision.  

Mad like a Hen: Delirium, hallucinations, "picking at imaginary threads."  

Dry like a Bone: Extreme thirst, dry mouth and throat.  

CLINICAL FEATURES: THE 9 D'S

  1. Dryness of mouth & throat  
  2. Difficulty in talking  
  3. Dilation of cutaneous vessels  
  4. Dilation of pupil  
  5. Dysphagia  
  6. Drunken gait  
  7. Dry & hot skin  
  8. Drowsiness  
  9. Delirium  

Management and Treatment

Treatment must be aggressive and rapid to prevent respiratory failure.

Modern Emergency Care:

Gastric Lavage: Using weak Potassium Permanganate (KMnO₄) to neutralize the alkaloids.

Antidote: Physostigmine is the modern antidote of choice, it can cross the blood-brain barrier to reverse central symptoms.

Supportive Care: Diazepam for convulsions and cold sponges to manage hyperthermia.

Ayurvedic Management (Agadtantra):

Emesis: Inducing  vomiting using Madanphala.

Ayurvedic Antidotes: Administration of Cow's milk with sugar or Ghee is classically recommended to soothe the system.

Herbal Counter-measures: The use of Kamal Patra (lotus leaf) powder or Chincha Rasa (tamarind juice)  is cited in some texts to resist toxic effects.

Forensic and Medico-Legal Importance

Datura is historically notorious in forensic medicine for its use in criminal activities.

  • "Roadside Poison": they are Used as "Road Poison" often used by criminals to stupefy travelers for robbery or kidnapping.
  • Accidental Poisoning: Children may accidentally ingest the fruit, or the seeds may be mistaken for chili seeds during food preparation.
  • Criminal Abortion: In some traditional contexts, it has been misused for inducing illegal abortions.
  • Identification: Forensic experts distinguish Datura seeds from chili seeds by their double-edged border, pitted surface, and bitter taste 

POSTMORTEM FINDINGS

Signs of Asphyxia.  

Congestion of internal organs (viscera).  

Presence of seeds in the stomach (resist decay).  

Mydriatic Test: Used on animals to detect Dhatura presence (instilling solution into a cat's eye).  

PURIFICATION & PREPARATIONS

  • Seeds are boiled in cow milk for 3 hours in Dolayantra then wash with water. Dried in sunlight and can be used.  
  • Medicinal Preparations: Tribhuvan Kirti rasa, Laxmivilas rasa, kanakkasav, Unmad, gajankush rasa.  


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This Blog Post and the information provided for the strictly for educational and academic purposes only. It serves as a study aid for students of Agadtantra (Ayurvedic Toxicology) and Forensic Medicine in Bams 2nd year. 

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