The toxidrome framework is a diagnostic principle in emergency medicine/toxicology by which patients with unknown poison exposures are classified into clinical syndromes based on observable autonomic effects (pupillary size, skin/secretion findings, and vital signs) rather than attempting to reason from individual drug pharmacology. The five traditional toxidromes—sympathomimetic, anticholinergic, cholinergic, sedative-hypnotic, and opioid—each present a characteristic constellation of heart rate, blood pressure, temperature, pupil size, skin, and secretion findings that allows rapid narrowing of the differential diagnosis and guides antidote selection (e.g., atropine/pralidoxime for cholinergic toxicity, naloxone for opioids, physostigmine for anticholinergic toxicity, N-acetylcysteine for acetaminophen). This belongs to the domain of toxicology within emergency medicine, linking autonomic nervous system pharmacology to a pattern-recognition-based clinical assessment and management algorithm (ABCs, decontamination, antidote administration).
The toxidrome framework is a diagnostic principle in emergency medicine/toxicology by which patients with unknown poison exposures are classified into clinical syndromes based on observable autonomic…