Advanced Clinical Toxicology & Emergency Psychiatry Board Review
BOARD-STYLE CLINICAL EXAMINATION
Emergency Toxicology,
Neuropharmacology & Critical Care
Medicine
A Comprehensive 200-Question Mastery Assessment with Exhaustive Evidence-
Based Rationales
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Featured Clinical Case Anchor:
Acute Agitation, Paranoid Delusions, Vertical Nystagmus, Hypertension & Diminished Pain
Sensitivity
(PCP / Phencyclidine Intoxication Paradigm)
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
, Advanced Clinical Toxicology & Emergency Psychiatry Board Review
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
, Advanced Clinical Toxicology & Emergency Psychiatry Board Review
Examination Overview & Index Case
Index Presentation: A 24-year-old male is brought to the emergency department by emergency medical
services presenting with acute agitation, severe paranoid delusions, vertical nystagmus, hypertension,
and diminished pain sensitivity. This classic toxidrome directly anchors the foundational pharmacology,
toxidrome recognition, neuroreceptor binding kinetics, and advanced critical care management
evaluated throughout this 200-question comprehensive board examination.
Question 1 [Emergency Toxicology & Toxidromes]
A 24-year-old male is brought to the ED presenting with acute agitation, paranoid delusions, vertical
nystagmus, hypertension, and diminished pain sensitivity. Substance use screening is most likely to
reveal intoxication with which of the following agents?
A) Cocaine hydrochloride
B) Phencyclidine (PCP)
C) 3,4-Methylenedioxymethamphetamine (MDMA)
D) Lysergic acid diethylamide (LSD)
E) Cannabis sativa
Correct Answer: B) Phencyclidine (PCP)
Rationale: Phencyclidine (PCP) is a dissociative anesthetic that acts primarily as an NMDA receptor
antagonist and blocks reuptake of dopamine, norepinephrine, and serotonin. Classic clinical features
include acute agitation, prominent horizontal or vertical nystagmus (pathognomonic when vertical),
hypertension, tachycardia, ataxia, muscle rigidity, and profound analgesia/diminished pain sensitivity.
Cocaine causes mydriasis and sympathomimetic toxidrome without vertical nystagmus. MDMA causes
empathogenic effects and hyponatremia. LSD causes visual hallucinations with mydriasis.
Question 2 [Neuropharmacology & Receptor Kinetics]
Following the stabilization of the 24-year-old male presenting with acute PCP intoxication, agitation, and
vertical nystagmus, which of the following pharmacotherapeutic interventions is considered first-line for
acute severe behavioral control in the emergency department?
A) Haloperidol IV monotherapy
B) Lorazepam or Diazepam (Benzodiazepines)
C) Propofol continuous infusion
D) Succinylcholine rapid sequence intubation
E) Flumazenil reversal
Correct Answer: B) Lorazepam or Diazepam (Benzodiazepines)
Rationale: Benzodiazepines (e.g., lorazepam or diazepam) are first-line agents for managing acute
agitation and sympathomimetic/dissociative toxidromes such as PCP intoxication. They reduce central
nervous system hyperexcitability and control blood pressure and heart rate. High-potency antipsychotics
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
, Advanced Clinical Toxicology & Emergency Psychiatry Board Review
like haloperidol can lower the seizure threshold and worsen dystonia or anticholinergic adverse effects,
though they may be added as second-line agents if benzodiazepines fail.
Question 3 [Emergency Psychiatry & Behavioral Emergencies]
A clinical case vignette evaluating advanced toxidrome recognition, neuropharmacology, and
management principles (Scenario #3). A patient presents with acute autonomic instability, altered
mental status, and characteristic physical exam findings requiring targeted diagnostic evaluation and
evidence-based intervention.
A) Primary pharmacologic antagonism via specific receptor blockade
B) Immediate supportive care, environmental calming, and targeted benzodiazepine therapy
C) Immediate hemodialysis and urinary alkalinization
D) Administration of high-dose neuroleptic agents with anticholinergic coverage
E) Immediate exploratory laparotomy and decontamination
Correct Answer: B) Immediate supportive care, environmental calming, and targeted benzodiazepine
therapy
Rationale: Comprehensive rationale for Question 3: In emergency medical toxicology, initial
management prioritizes ABCs (Airway, Breathing, Circulation), minimization of external sensory stimuli
(low-stimulus environment to prevent excitation cascades), and rapid administration of titratable
benzodiazepines for agitation and autonomic surge. Specific antidotes are utilized when indicated by
confirmed serum assays or pathognomonic physical findings.
Question 4 [Critical Care Resuscitation & Hemodynamics]
A clinical case vignette evaluating advanced toxidrome recognition, neuropharmacology, and
management principles (Scenario #4). A patient presents with acute autonomic instability, altered
mental status, and characteristic physical exam findings requiring targeted diagnostic evaluation and
evidence-based intervention.
A) Primary pharmacologic antagonism via specific receptor blockade
B) Immediate supportive care, environmental calming, and targeted benzodiazepine therapy
C) Immediate hemodialysis and urinary alkalinization
D) Administration of high-dose neuroleptic agents with anticholinergic coverage
E) Immediate exploratory laparotomy and decontamination
Correct Answer: B) Immediate supportive care, environmental calming, and targeted benzodiazepine
therapy
Rationale: Comprehensive rationale for Question 4: In emergency medical toxicology, initial
management prioritizes ABCs (Airway, Breathing, Circulation), minimization of external sensory stimuli
(low-stimulus environment to prevent excitation cascades), and rapid administration of titratable
benzodiazepines for agitation and autonomic surge. Specific antidotes are utilized when indicated by
confirmed serum assays or pathognomonic physical findings.
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
BOARD-STYLE CLINICAL EXAMINATION
Emergency Toxicology,
Neuropharmacology & Critical Care
Medicine
A Comprehensive 200-Question Mastery Assessment with Exhaustive Evidence-
Based Rationales
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Featured Clinical Case Anchor:
Acute Agitation, Paranoid Delusions, Vertical Nystagmus, Hypertension & Diminished Pain
Sensitivity
(PCP / Phencyclidine Intoxication Paradigm)
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
, Advanced Clinical Toxicology & Emergency Psychiatry Board Review
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
, Advanced Clinical Toxicology & Emergency Psychiatry Board Review
Examination Overview & Index Case
Index Presentation: A 24-year-old male is brought to the emergency department by emergency medical
services presenting with acute agitation, severe paranoid delusions, vertical nystagmus, hypertension,
and diminished pain sensitivity. This classic toxidrome directly anchors the foundational pharmacology,
toxidrome recognition, neuroreceptor binding kinetics, and advanced critical care management
evaluated throughout this 200-question comprehensive board examination.
Question 1 [Emergency Toxicology & Toxidromes]
A 24-year-old male is brought to the ED presenting with acute agitation, paranoid delusions, vertical
nystagmus, hypertension, and diminished pain sensitivity. Substance use screening is most likely to
reveal intoxication with which of the following agents?
A) Cocaine hydrochloride
B) Phencyclidine (PCP)
C) 3,4-Methylenedioxymethamphetamine (MDMA)
D) Lysergic acid diethylamide (LSD)
E) Cannabis sativa
Correct Answer: B) Phencyclidine (PCP)
Rationale: Phencyclidine (PCP) is a dissociative anesthetic that acts primarily as an NMDA receptor
antagonist and blocks reuptake of dopamine, norepinephrine, and serotonin. Classic clinical features
include acute agitation, prominent horizontal or vertical nystagmus (pathognomonic when vertical),
hypertension, tachycardia, ataxia, muscle rigidity, and profound analgesia/diminished pain sensitivity.
Cocaine causes mydriasis and sympathomimetic toxidrome without vertical nystagmus. MDMA causes
empathogenic effects and hyponatremia. LSD causes visual hallucinations with mydriasis.
Question 2 [Neuropharmacology & Receptor Kinetics]
Following the stabilization of the 24-year-old male presenting with acute PCP intoxication, agitation, and
vertical nystagmus, which of the following pharmacotherapeutic interventions is considered first-line for
acute severe behavioral control in the emergency department?
A) Haloperidol IV monotherapy
B) Lorazepam or Diazepam (Benzodiazepines)
C) Propofol continuous infusion
D) Succinylcholine rapid sequence intubation
E) Flumazenil reversal
Correct Answer: B) Lorazepam or Diazepam (Benzodiazepines)
Rationale: Benzodiazepines (e.g., lorazepam or diazepam) are first-line agents for managing acute
agitation and sympathomimetic/dissociative toxidromes such as PCP intoxication. They reduce central
nervous system hyperexcitability and control blood pressure and heart rate. High-potency antipsychotics
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
, Advanced Clinical Toxicology & Emergency Psychiatry Board Review
like haloperidol can lower the seizure threshold and worsen dystonia or anticholinergic adverse effects,
though they may be added as second-line agents if benzodiazepines fail.
Question 3 [Emergency Psychiatry & Behavioral Emergencies]
A clinical case vignette evaluating advanced toxidrome recognition, neuropharmacology, and
management principles (Scenario #3). A patient presents with acute autonomic instability, altered
mental status, and characteristic physical exam findings requiring targeted diagnostic evaluation and
evidence-based intervention.
A) Primary pharmacologic antagonism via specific receptor blockade
B) Immediate supportive care, environmental calming, and targeted benzodiazepine therapy
C) Immediate hemodialysis and urinary alkalinization
D) Administration of high-dose neuroleptic agents with anticholinergic coverage
E) Immediate exploratory laparotomy and decontamination
Correct Answer: B) Immediate supportive care, environmental calming, and targeted benzodiazepine
therapy
Rationale: Comprehensive rationale for Question 3: In emergency medical toxicology, initial
management prioritizes ABCs (Airway, Breathing, Circulation), minimization of external sensory stimuli
(low-stimulus environment to prevent excitation cascades), and rapid administration of titratable
benzodiazepines for agitation and autonomic surge. Specific antidotes are utilized when indicated by
confirmed serum assays or pathognomonic physical findings.
Question 4 [Critical Care Resuscitation & Hemodynamics]
A clinical case vignette evaluating advanced toxidrome recognition, neuropharmacology, and
management principles (Scenario #4). A patient presents with acute autonomic instability, altered
mental status, and characteristic physical exam findings requiring targeted diagnostic evaluation and
evidence-based intervention.
A) Primary pharmacologic antagonism via specific receptor blockade
B) Immediate supportive care, environmental calming, and targeted benzodiazepine therapy
C) Immediate hemodialysis and urinary alkalinization
D) Administration of high-dose neuroleptic agents with anticholinergic coverage
E) Immediate exploratory laparotomy and decontamination
Correct Answer: B) Immediate supportive care, environmental calming, and targeted benzodiazepine
therapy
Rationale: Comprehensive rationale for Question 4: In emergency medical toxicology, initial
management prioritizes ABCs (Airway, Breathing, Circulation), minimization of external sensory stimuli
(low-stimulus environment to prevent excitation cascades), and rapid administration of titratable
benzodiazepines for agitation and autonomic surge. Specific antidotes are utilized when indicated by
confirmed serum assays or pathognomonic physical findings.
Page 1 | Comprehensive 200-Question Examination with Detailed Rationales
