Recognition And Management - NAPLEX

1. What is the primary management approach for neuroleptic malignant syndrome?

   Stop antipsychotic; supportive care. Discontinues the offending agent while providing cooling, hydration, and monitoring for complications.

2. What is the antidotal therapy commonly used for moderate to severe serotonin syndrome?

   Cyproheptadine. Functions as a serotonin 5-HT2A receptor antagonist to mitigate hyperstimulation symptoms.

3. Identify the classic triad suggesting anaphylaxis (three findings).

   Hypotension, bronchospasm, urticaria/angioedema. Represents multisystem involvement in severe IgE-mediated hypersensitivity reaction.

4. Which toxidrome presents with diaphoresis, miosis, bronchorrhea, and bradycardia?

   Cholinergic (organophosphate) toxidrome. Stems from acetylcholinesterase inhibition leading to excessive muscarinic and nicotinic stimulation.

5. Which toxidrome presents with hyperthermia, mydriasis, dry skin, and urinary retention?

   Anticholinergic toxidrome. Arises from muscarinic blockade causing decreased secretions, hyperthermia, and altered mental status.

6. What is the immediate first action for severe hypoglycemia with unconsciousness?

   Give glucagon or IV dextrose. Quickly restores blood glucose to prevent neuronal damage and reverse altered consciousness.

7. What is the preferred initial management for acute asthma exacerbation with wheezing and dyspnea?

   Inhaled SABA plus systemic corticosteroid. SABA induces rapid bronchodilation, while corticosteroids suppress airway inflammation.

8. Identify the syndrome: fever, rigidity, autonomic instability, and elevated CK after antipsychotic use.

   Neuroleptic malignant syndrome. Occurs as an idiosyncratic reaction to dopamine blockade causing muscle rigidity and rhabdomyolysis.

9. Identify the syndrome: hyperreflexia, clonus, agitation, and diaphoresis after serotonergic drugs.

   Serotonin syndrome. Arises from excessive serotonin leading to neuromuscular excitation and autonomic hyperactivity.

10. Identify the immediate management for suspected sepsis with hypotension and infection signs.

    IV fluids and broad-spectrum antibiotics. Provides volume resuscitation for shock and empiric coverage against likely pathogens.

11. What antidote is used for opioid overdose with respiratory depression?

    Naloxone. Acts as a competitive mu-opioid receptor antagonist to restore ventilation.

12. What is the preferred antidote for acetaminophen overdose with hepatotoxicity risk?

    N-acetylcysteine. Replenishes glutathione to neutralize the toxic NAPQI metabolite and prevent liver damage.

13. What is the most immediate cardiac membrane-stabilizing treatment for severe hyperkalemia?

    IV calcium (gluconate or chloride). Stabilizes cardiac cell membranes by antagonizing potassium's depolarizing effects.

14. What therapy shifts potassium intracellularly in acute hyperkalemia management?

    Insulin with dextrose. Insulin activates Na/K-ATPase to drive potassium into cells, with glucose preventing hypoglycemia.

15. Which ECG finding most strongly suggests torsades de pointes risk?

    Prolonged QT interval. Reflects delayed ventricular repolarization predisposing to polymorphic ventricular tachycardia.

16. What is the preferred initial management for suspected acute stroke symptoms?

    Activate emergency response and urgent imaging. Facilitates rapid diagnosis and time-sensitive interventions like thrombolysis for ischemic stroke.

17. What is the first-line decontamination method for a recent toxic ingestion when appropriate?

    Activated charcoal. Adsorbs toxins in the GI tract to limit systemic absorption if given soon after ingestion.

18. What is the preferred first-line agent for anaphylaxis treatment?

    IM epinephrine. Rapidly reverses hypotension, bronchospasm, and angioedema via alpha and beta adrenergic receptor stimulation.

19. What is the major contraindication to flumazenil in overdose management?

    Chronic benzodiazepine use or seizure risk. Risks precipitating withdrawal seizures in dependent users or those with seizure predisposition.

20. What is the first-line drug treatment for torsades de pointes?

    IV magnesium sulfate. Suppresses early afterdepolarizations and stabilizes potassium channels in prolonged QT states.

21. Which acid-base pattern is most consistent with salicylate toxicity?

    Respiratory alkalosis plus anion gap metabolic acidosis. Initial respiratory stimulation causes alkalosis, followed by uncoupling-induced metabolic acidosis.

22. Which toxidrome presents with miosis, respiratory depression, and CNS depression?

    Opioid toxidrome. Results from mu-opioid receptor agonism depressing respiratory drive and CNS function while constricting pupils.

23. Which electrolyte abnormality can cause peaked T waves and widened QRS on ECG?

    Hyperkalemia. Elevated extracellular potassium alters cardiac repolarization and conduction on ECG.

24. Which antidote is first-line for benzodiazepine overdose in a benzodiazepine-naive patient?

    Flumazenil. Competitively antagonizes benzodiazepine binding at GABA_A receptors to reverse sedation.

25. What are the two key antidotes for organophosphate poisoning?

    Atropine and pralidoxime. Atropine competitively inhibits muscarinic receptors, while pralidoxime regenerates acetylcholinesterase.

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