Organic Irritant Poisons

Organic Irritant Poisons - Plant & Critter Culprits

• Definition: Plant/animal poisons causing local irritation & intense GIT inflammation.
• Mechanism: Direct local action on contacted mucous membranes. Toxalbumins (toxic proteins in castor/croton) inhibit RNA polymerase causing cell death and RBC agglutination.
• Classification & Examples (per ICD-11 coding):

  Origin	Type	Examples
  Vegetable	Oils	Castor oil, Croton oil (contain toxalbumins)
  	Glycosides	Saponins (e.g., Arणी), cardiac glycosides (local action)
  	Resins	Capsicum, Marking Nut, Abrus
  Animal	Insects	Cantharides (Spanish fly)
  	Toxins	Snake/scorpion venoms (local effects)

• General Signs & Symptoms (GIT Focus):
  • Burning pain from mouth to stomach; throat swelling.
  • Nausea, persistent vomiting (may be blood-stained).
  • Severe abdominal cramps, profuse diarrhea (often with blood/mucus).
• General Management (modern toxicology approach):
  • Decontamination: Activated charcoal preferred; gastric lavage only if recent ingestion & no contraindications.
  • Demulcents: Milk, bland oils for mucosal protection.
  • Symptomatic and supportive care: IV fluids, analgesics.

⭐ Organic irritants: intense inflammation/vesication, no true erosion/perforation like inorganic corrosives.

Organic Irritant Poisons - Seed & Oil Shockers

Vegetable irritants with potent toxalbumins.

• Castor (Ricinus communis) 📌 'CASTs a shadow with Delayed GIT Storm'

  • Active Principle: Ricin (toxalbumin), Ricinine.
  • S/S: Delayed onset (hours-days), severe burning gastroenteritis, bloody diarrhea, shock.
  • Fatal Dose: The lethal oral dose of ricin for humans ranges from 1-20 mg/kg body weight. As few as 4 seeds can be fatal for an average-sized adult, while lesser amounts can cause severe symptoms like vomiting, abdominal pain, diarrhea, and convulsions. Consuming 0.5-30 beans can trigger symptoms.
  • Fatal Period: 2-12 days.
  • PM Findings: Hemorrhagic gastroenteritis, organ damage. Seeds may be present.
  • MLI: Accidental, homicidal, cattle poisoning.

  ⭐ Ricin inhibits protein synthesis by inactivating the 60S ribosomal subunit (cleaving 28S rRNA).

• Croton (Croton tiglium)

  • Active Principle: Crotin (toxalbumin), Croton oil (phorbol esters).
  • S/S: Intense burning pain (mouth to anus), vesication, severe vomiting & purgation, collapse.
  • Fatal Dose: 1 seed (child), 4 seeds (adult); Oil: 1 mL.
  • Fatal Period: Hours to 3-6 days.
  • PM Findings: Intense GIT inflammation, corrosion, vesication.
  • MLI: Accidental, purgative abuse, vesicant abuse, abortifacient.

Organic Irritant Poisons - Potent Plant Perils

• Abrus precatorius (Ratti) 📌 ABRIN: A Bright Red Seed Is Nasty

  • Active Principle: Abrin (toxalbumin)
  • S/S: N/V, bloody diarrhea, shock. 'Sui poisoning' (cattle). Abrin more potent if injected.
  • Fatal Dose: 1-2 crushed seeds; 90-120 mg abrin.
  • Fatal Period: 3-5 days.
  • PM Findings: GIT hemorrhages, organ congestion; seeds.
  • MLI: Homicide (Sui), accidental.

  ⭐ Abrus precatorius seeds are often used in criminal poisoning of cattle via 'Sui' (needles).

• Capsicum annuum (Chilli)

  • Active Principle: Capsaicin
  • S/S: Intense burning (skin, eyes, GIT), erythema.
  • Fatal Dose/Period: Rarely fatal.
  • PM Findings: GIT/respiratory inflammation.
  • MLI: Torture, accidental.

• Semicarpus anacardium (Bhilawa)

  • Active Principle: Bhilawanol
  • S/S: Vesicant dermatitis, 'artificial bruise'; severe GIT irritation (ingested).
  • Fatal Dose: 5-10 g (juice).
  • Fatal Period: 12-24 hours.
  • PM Findings: GIT inflammation/corrosion; skin lesions.
  • MLI: Malingering (artificial bruise), accidental.

Organic Irritant Poisons - Critter & Oddball Zingers

• Cantharides (Spanish Fly)

  • Source: Dried beetles (Lytta vesicatoria)

  • Active Principle: Cantharidin

  • S/S: Intense burning pain (mouth to stomach), dysphagia, vomiting, bloody diarrhea. Urinary: strangury, painful micturition, priapism, renal damage.

  • Fatal Dose: Highly variable (historically cited 10-60 mg cantharidin, but even smaller amounts can be fatal); ~1.5 g (powdered beetle).

  • Fatal Period: Within hours to 24 hours (variable timing).

  • MLI: Historically used as aphrodisiac but extremely toxic with no proven efficacy; abortifacient, vesicant.

  ⭐ Cantharidin is highly toxic with no scientific evidence supporting aphrodisiac effects. Poisoning causes severe urinary tract irritation, acute kidney injury, gastrointestinal hemorrhage, and potentially death. No antidote exists - treatment is supportive only.

• Snake Venom (Viperidae)
  • Local Irritant Effects: Severe pain, rapid swelling, bruising, blistering, local necrosis at bite site.
• Ptomaines
  • Source: Alkaloids from bacterial putrefaction of proteinaceous food.
  • S/S: Mimic food poisoning: nausea, vomiting, diarrhea. True toxicity rare.

High‑Yield Points - ⚡ Biggest Takeaways

• Ricin (Castor seeds) and Abrin (Abrus precatorius) are potent phytotoxins (toxalbumins) causing severe GIT symptoms.
• Croton oil (Croton tiglium) is a powerful vesicant and drastic purgative.
• Capsaicin from Capsicum species induces intense burning pain and inflammation.
• Semecarpus anacardium (Marking Nut) causes characteristic irritant contact dermatitis; used in malingering.
• Calotropis (Madar) latex acts as a significant local irritant, producing blisters and erythema.
• Key features: violent gastroenteritis, local irritation, and potential for systemic toxicity with some agents.