Which of the following represents the hallmark signs of cholinergic agent exposure?

• A. Salivation, Lacrimation, Urination, Defecation, GI irritation, Eye constriction, Miosis
• B. Tremors and bradycardia only
• C. Dry mouth and mydriasis
• D. Increased sweating and hyperreflexia

Answer: (A)

Cholinergic exposure overstimulates muscarinic receptors, leading to increased secretions and smooth muscle constriction. The hallmark signs come from those muscarinic effects: excess saliva, tearing, urination, defecation, GI upset, and pupil constriction (miosis). This constellation matches the described signs of secretions and constricted pupils, reflecting the classic cholinergic pattern. While sweating can occur, the combination of salivation, lacrimation, urination, defecation, GI irritation, and miosis best captures the characteristic picture. The other options describe incomplete or opposite effects (dry mouth and dilated pupils suggest anticholinergic activity; tremors or hyperreflexia aren’t the defining features).