A patient working around nerve agents begins sweating, drooling, and tearing. What is the most likely poisoning?

A patient working around nerve agents begins sweating, drooling, and tearing. What is the most likely poisoning?

• A. Arsenic poisoning
• B. Cyanide poisoning
• C. Mercury poisoning
• D. Organophosphate poisoning

Answer: (D)

Excess acetylcholine at muscarinic receptors from acetylcholinesterase inhibition is what organophosphate nerve agents cause. That buildup produces cholinergic symptoms like sweating, drooling, and tearing, which are classic muscarinic signs of organophosphate exposure. In workers around nerve agents, these signs point to organophosphate poisoning because the agent stops the enzyme that normally breaks down acetylcholine, leading to nonstop stimulation of glands and smooth muscles. Arsenic poisoning typically presents with GI distress and neuropathies; cyanide causes rapid cellular hypoxia with symptoms like headache and confusion and doesn’t produce the same cholinergic secretions; mercury leads to neuropsychiatric and renal issues over time. Understanding this mechanism also helps with treatment ideas: atropine blocks the muscarinic effects, and pralidoxime can re-activate the inhibited enzyme, along with decontamination.

Excess acetylcholine at muscarinic receptors from acetylcholinesterase inhibition is what organophosphate nerve agents cause. That buildup produces cholinergic symptoms like sweating, drooling, and tearing, which are classic muscarinic signs of organophosphate exposure. In workers around nerve agents, these signs point to organophosphate poisoning because the agent stops the enzyme that normally breaks down acetylcholine, leading to nonstop stimulation of glands and smooth muscles. Arsenic poisoning typically presents with GI distress and neuropathies; cyanide causes rapid cellular hypoxia with symptoms like headache and confusion and doesn’t produce the same cholinergic secretions; mercury leads to neuropsychiatric and renal issues over time. Understanding this mechanism also helps with treatment ideas: atropine blocks the muscarinic effects, and pralidoxime can re-activate the inhibited enzyme, along with decontamination.