2026 BCEMP Exam Prep: Emergency Medicine
Pharmacist Practice Questions with Answer
Rationales for Toxicology, Critical Care
Pharmacotherapy, Trauma, Emergency
Treatment, and Study Guide
Domain 1: Toxicology and Overdose Management
Q1. A 24-year-old patient presents to the emergency department with a history of
ingesting an unknown amount of acetaminophen approximately 4 hours ago. The
patient is currently asymptomatic. Which of the following is the most appropriate
initial management?
A. Administer activated charcoal 1 g/kg orally
B. Obtain a serum acetaminophen level and initiate N-acetylcysteine if indicated
C. Administer naloxone 2 mg IV
D. Perform gastric lavage
Answer: B
Rationale: Acetaminophen toxicity is a leading cause of acute liver failure. The
Rumack-Matthew nomogram guides treatment decisions based on serum
acetaminophen levels obtained at least 4 hours post-ingestion. N-acetylcysteine
(NAC) is the antidote and should be initiated as soon as possible when levels are
above the treatment line. Activated charcoal (A) may be considered if the patient
presents within 1-2 hours of ingestion, but this patient is at 4 hours. Naloxone (C)
is for opioid overdose. Gastric lavage (D) is not routinely recommended .
Q2. A patient presents with altered mental status, respiratory depression, and
pinpoint pupils. Which of the following is the first-line treatment?
A. Flumazenil 0.2 mg IV
B. Naloxone 0.4–2 mg IV, titrated to respiratory rate
C. N-acetylcysteine 150 mg/kg IV
D. Physostigmine 1 mg IV
,Answer: B
Rationale: The presentation is classic for opioid overdose. Naloxone is a
competitive opioid receptor antagonist that rapidly reverses respiratory depression
and sedation. The dose should be titrated to restore adequate respiratory rate
(typically >12 breaths/min) while avoiding precipitated withdrawal. Flumazenil
(A) is for benzodiazepine overdose and can precipitate seizures in chronic
benzodiazepine users. N-acetylcysteine (C) is for acetaminophen toxicity.
Physostigmine (D) is for anticholinergic toxicity .
Q3. A patient is brought to the ED after ingesting a substance at a party. The
patient presents with tachycardia, hypertension, mydriasis, diaphoresis, and
agitation. Which toxidrome is most consistent with this presentation?
A. Opioid toxidrome
B. Sympathomimetic toxidrome
C. Cholinergic toxidrome
D. Sedative-hypnotic toxidrome
Answer: B
Rationale: The sympathomimetic toxidrome is characterized by tachycardia,
hypertension, mydriasis (pupil dilation), diaphoresis (sweating), agitation, and
hyperthermia. Common causative agents include cocaine, amphetamines, and
MDMA. The opioid toxidrome (A) presents with miosis, respiratory depression,
and CNS depression. The cholinergic toxidrome (C) presents with bradycardia,
miosis, salivation, lacrimation, urination, diarrhea, and bronchospasm. The
sedative-hypnotic toxidrome (D) presents with CNS depression, respiratory
depression, and normal to small pupils .
Q4. A patient presents with salivation, lacrimation, urination, diarrhea, and
bradycardia after exposure to an agricultural pesticide. Which antidote should be
administered first?
A. Atropine
B. Pralidoxime
C. Naloxone
D. Flumazenil
,Answer: A
Rationale: The presentation is consistent with cholinergic toxidrome
(organophosphate poisoning). Atropine is the first-line antidote and should be
administered immediately to reverse muscarinic effects such as bradycardia,
salivation, and bronchospasm. Pralidoxime (B) is administered after atropine to
reactivate acetylcholinesterase if given early, before enzyme aging occurs.
Naloxone (C) is for opioid overdose. Flumazenil (D) is for benzodiazepine
overdose .
Q5. A patient is suspected of cyanide toxicity after a fire in an enclosed space.
Which antidote is preferred?
A. Sodium nitrite
B. Hydroxocobalamin
C. Methylene blue
D. N-acetylcysteine
Answer: B
Rationale: Hydroxocobalamin (Cyanokit) is the preferred antidote for cyanide
toxicity. It works by binding cyanide to form cyanocobalamin (vitamin B12),
which is excreted renally. Unlike sodium nitrite (A), hydroxocobalamin does not
induce methemoglobinemia, making it safer in patients with concurrent carbon
monoxide poisoning (common in fire victims). Methylene blue (C) is used for
methemoglobinemia. N-acetylcysteine (D) is for acetaminophen toxicity .
Q6. A patient presents with a wide anion gap metabolic acidosis, an elevated
osmolar gap, and visual disturbances after ingesting an unknown substance. Which
toxin is most likely responsible?
A. Ethylene glycol
B. Methanol
C. Isopropanol
D. Salicylate
Answer: B
, Rationale: The combination of elevated osmolar gap, anion gap metabolic
acidosis, and visual disturbances (blurred vision, "snowfield" vision, blindness) is
classic for methanol toxicity. Methanol is metabolized to formic acid, which causes
severe metabolic acidosis and optic nerve toxicity. Ethylene glycol (A) causes
calcium oxalate crystals in urine and renal failure. Isopropanol (C) causes ketosis
without metabolic acidosis. Salicylate (D) causes mixed respiratory alkalosis and
metabolic acidosis .
Q7. A patient presents after ingesting a large amount of aspirin. Which of the
following is a characteristic finding in salicylate toxicity?
A. Respiratory acidosis
B. Mixed respiratory alkalosis and metabolic acidosis
C. Isolated metabolic alkalosis
D. Normal acid-base status
Answer: B
Rationale: Salicylate toxicity classically presents with a mixed acid-base
disturbance: respiratory alkalosis (due to direct stimulation of the medullary
respiratory center) and metabolic acidosis (due to uncoupling of oxidative
phosphorylation and accumulation of organic acids). This mixed pattern is a
hallmark of salicylate poisoning .
Q8. A patient with severe salicylate toxicity has a serum salicylate level of 90
mg/dL and is exhibiting altered mental status. Which of the following is the most
appropriate intervention?
A. Administer activated charcoal 1 g/kg orally
B. Initiate hemodialysis
C. Administer sodium bicarbonate infusion
D. Administer N-acetylcysteine
Answer: B
Rationale: Hemodialysis is indicated for severe salicylate toxicity, defined by
serum levels >90-100 mg/dL, altered mental status, renal failure, or refractory
acidosis. Hemodialysis removes salicylate from the bloodstream and corrects acid-
Pharmacist Practice Questions with Answer
Rationales for Toxicology, Critical Care
Pharmacotherapy, Trauma, Emergency
Treatment, and Study Guide
Domain 1: Toxicology and Overdose Management
Q1. A 24-year-old patient presents to the emergency department with a history of
ingesting an unknown amount of acetaminophen approximately 4 hours ago. The
patient is currently asymptomatic. Which of the following is the most appropriate
initial management?
A. Administer activated charcoal 1 g/kg orally
B. Obtain a serum acetaminophen level and initiate N-acetylcysteine if indicated
C. Administer naloxone 2 mg IV
D. Perform gastric lavage
Answer: B
Rationale: Acetaminophen toxicity is a leading cause of acute liver failure. The
Rumack-Matthew nomogram guides treatment decisions based on serum
acetaminophen levels obtained at least 4 hours post-ingestion. N-acetylcysteine
(NAC) is the antidote and should be initiated as soon as possible when levels are
above the treatment line. Activated charcoal (A) may be considered if the patient
presents within 1-2 hours of ingestion, but this patient is at 4 hours. Naloxone (C)
is for opioid overdose. Gastric lavage (D) is not routinely recommended .
Q2. A patient presents with altered mental status, respiratory depression, and
pinpoint pupils. Which of the following is the first-line treatment?
A. Flumazenil 0.2 mg IV
B. Naloxone 0.4–2 mg IV, titrated to respiratory rate
C. N-acetylcysteine 150 mg/kg IV
D. Physostigmine 1 mg IV
,Answer: B
Rationale: The presentation is classic for opioid overdose. Naloxone is a
competitive opioid receptor antagonist that rapidly reverses respiratory depression
and sedation. The dose should be titrated to restore adequate respiratory rate
(typically >12 breaths/min) while avoiding precipitated withdrawal. Flumazenil
(A) is for benzodiazepine overdose and can precipitate seizures in chronic
benzodiazepine users. N-acetylcysteine (C) is for acetaminophen toxicity.
Physostigmine (D) is for anticholinergic toxicity .
Q3. A patient is brought to the ED after ingesting a substance at a party. The
patient presents with tachycardia, hypertension, mydriasis, diaphoresis, and
agitation. Which toxidrome is most consistent with this presentation?
A. Opioid toxidrome
B. Sympathomimetic toxidrome
C. Cholinergic toxidrome
D. Sedative-hypnotic toxidrome
Answer: B
Rationale: The sympathomimetic toxidrome is characterized by tachycardia,
hypertension, mydriasis (pupil dilation), diaphoresis (sweating), agitation, and
hyperthermia. Common causative agents include cocaine, amphetamines, and
MDMA. The opioid toxidrome (A) presents with miosis, respiratory depression,
and CNS depression. The cholinergic toxidrome (C) presents with bradycardia,
miosis, salivation, lacrimation, urination, diarrhea, and bronchospasm. The
sedative-hypnotic toxidrome (D) presents with CNS depression, respiratory
depression, and normal to small pupils .
Q4. A patient presents with salivation, lacrimation, urination, diarrhea, and
bradycardia after exposure to an agricultural pesticide. Which antidote should be
administered first?
A. Atropine
B. Pralidoxime
C. Naloxone
D. Flumazenil
,Answer: A
Rationale: The presentation is consistent with cholinergic toxidrome
(organophosphate poisoning). Atropine is the first-line antidote and should be
administered immediately to reverse muscarinic effects such as bradycardia,
salivation, and bronchospasm. Pralidoxime (B) is administered after atropine to
reactivate acetylcholinesterase if given early, before enzyme aging occurs.
Naloxone (C) is for opioid overdose. Flumazenil (D) is for benzodiazepine
overdose .
Q5. A patient is suspected of cyanide toxicity after a fire in an enclosed space.
Which antidote is preferred?
A. Sodium nitrite
B. Hydroxocobalamin
C. Methylene blue
D. N-acetylcysteine
Answer: B
Rationale: Hydroxocobalamin (Cyanokit) is the preferred antidote for cyanide
toxicity. It works by binding cyanide to form cyanocobalamin (vitamin B12),
which is excreted renally. Unlike sodium nitrite (A), hydroxocobalamin does not
induce methemoglobinemia, making it safer in patients with concurrent carbon
monoxide poisoning (common in fire victims). Methylene blue (C) is used for
methemoglobinemia. N-acetylcysteine (D) is for acetaminophen toxicity .
Q6. A patient presents with a wide anion gap metabolic acidosis, an elevated
osmolar gap, and visual disturbances after ingesting an unknown substance. Which
toxin is most likely responsible?
A. Ethylene glycol
B. Methanol
C. Isopropanol
D. Salicylate
Answer: B
, Rationale: The combination of elevated osmolar gap, anion gap metabolic
acidosis, and visual disturbances (blurred vision, "snowfield" vision, blindness) is
classic for methanol toxicity. Methanol is metabolized to formic acid, which causes
severe metabolic acidosis and optic nerve toxicity. Ethylene glycol (A) causes
calcium oxalate crystals in urine and renal failure. Isopropanol (C) causes ketosis
without metabolic acidosis. Salicylate (D) causes mixed respiratory alkalosis and
metabolic acidosis .
Q7. A patient presents after ingesting a large amount of aspirin. Which of the
following is a characteristic finding in salicylate toxicity?
A. Respiratory acidosis
B. Mixed respiratory alkalosis and metabolic acidosis
C. Isolated metabolic alkalosis
D. Normal acid-base status
Answer: B
Rationale: Salicylate toxicity classically presents with a mixed acid-base
disturbance: respiratory alkalosis (due to direct stimulation of the medullary
respiratory center) and metabolic acidosis (due to uncoupling of oxidative
phosphorylation and accumulation of organic acids). This mixed pattern is a
hallmark of salicylate poisoning .
Q8. A patient with severe salicylate toxicity has a serum salicylate level of 90
mg/dL and is exhibiting altered mental status. Which of the following is the most
appropriate intervention?
A. Administer activated charcoal 1 g/kg orally
B. Initiate hemodialysis
C. Administer sodium bicarbonate infusion
D. Administer N-acetylcysteine
Answer: B
Rationale: Hemodialysis is indicated for severe salicylate toxicity, defined by
serum levels >90-100 mg/dL, altered mental status, renal failure, or refractory
acidosis. Hemodialysis removes salicylate from the bloodstream and corrects acid-
