Nerve Agent Exposure: Recognizing Symptoms, Absorption Routes, and Emergency Treatment

Nerve Agent Toxicity: Rapid Recognition Saves Lives

Nerve agents—including sarin, VX, tabun, soman, and Novichok—are potent organophosphates that irreversibly inhibit acetylcholinesterase. This leads to a dangerous accumulation of acetylcholine, triggering a cholinergic crisis that can rapidly become fatal.

Routes of Exposure

• Inhalation (vapor/aerosol): Fastest onset of symptoms.
• Dermal (liquid): Absorption through skin is delayed but equally lethal.
• Ocular: Direct contact with eyes.
• Ingestion: Rare but possible.

Minute quantities can be fatal.

Symptom Progression: The SLUDGE and Killer B's Framework

• Mild: Miosis (pinpoint pupils), rhinorrhea, excessive salivation, bronchorrhea, diaphoresis, nausea, vomiting, diarrhea, fasciculations, muscle weakness.
• Moderate: Bronchospasm, bradycardia, confusion, urinary and fecal incontinence.
• Severe: Seizures, apnea/respiratory failure, flaccid paralysis, coma, death.

Immediate Treatment Protocols (Military & Civilian)

1. Decontamination: Remove all clothing (eliminates 90%+ of contamination), then flush skin and eyes with copious water and soap.
2. Antidote Administration (Auto-injectors):
   • Atropine: 2–6 mg IV/IM, repeated every 5–10 minutes until secretions dry and heart rate exceeds 80 bpm.
   • Pralidoxime (2-PAM): 600–1800 mg IV/IM; reactivates acetylcholinesterase if given early.
   • Benzodiazepines (Diazepam/Midazolam): For seizure control.
3. Supportive Care: Airway management, mechanical ventilation, oxygen therapy, IV fluids, continuous cardiac monitoring.

Preparedness Essentials

First responders require appropriate PPE, auto-injector kits (Mark I, ATNAA), and regular training. The public should be aware of shelter-in-place protocols and avoid contaminated areas.