Question 1

A patient with bipolar I disorder treated with lithium presents with coarse tremor, confusion, and vomiting after starting lisinopril two weeks ago. What is the most likely mechanism of this presentation?

A. Increased hepatic metabolism of lithium
B. Reduced renal clearance leading to lithium accumulation
C. Protein-binding displacement of lithium
D. Increased gastrointestinal absorption of lithium

Correct Answer: B — Reduced renal clearance leading to lithium accumulation

Rationale:
Lithium is almost entirely renally excreted. ACE inhibitors such as lisinopril reduce renal perfusion and sodium reabsorption, which can decrease lithium clearance and cause toxic accumulation. Lithium toxicity commonly presents with gastrointestinal distress, tremor, confusion, and neurologic symptoms. Lithium does not undergo hepatic metabolism and is minimally protein bound, making the other mechanisms unlikely.

References:
Kaplan & Sadock’s Synopsis of Psychiatry, 12th Edition
Stahl’s Prescriber’s Guide

Question 2

A patient with chronic schizophrenia demonstrates persistent negative symptoms despite adequate trials of two antipsychotics at therapeutic doses. What is the most appropriate next pharmacologic step?

A. Increase dose of current antipsychotic
B. Switch to clozapine
C. Add benzodiazepine therapy
D. Initiate antidepressant therapy

Correct Answer: B — Switch to clozapine

Rationale:
Treatment-resistant schizophrenia is defined as inadequate response to at least two antipsychotic trials at therapeutic doses. Clozapine is the gold-standard treatment in this scenario and has superior efficacy for refractory symptoms and reduction of suicidality.

References:
Kaplan & Sadock’s Synopsis of Psychiatry, 12th Edition
Stahl’s Prescriber’s Guide

Question 3

Which neurotransmitter pathway is most strongly associated with the positive symptoms of schizophrenia?

A. Mesocortical dopamine pathway
B. Mesolimbic dopamine pathway
C. Nigrostriatal dopamine pathway
D. Tuberoinfundibular dopamine pathway

Correct Answer: B — Mesolimbic dopamine pathway

Rationale:
Hyperactivity of dopamine transmission in the mesolimbic pathway is associated with positive psychotic symptoms such as hallucinations and delusions.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 4

A patient with borderline personality disorder demonstrates recurrent self-harm behaviors and emotional dysregulation. Which psychotherapy has the strongest evidence base for reducing these behaviors?

A. Supportive psychotherapy
B. Cognitive behavioral therapy
C. Dialectical behavior therapy
D. Psychodynamic therapy

Correct Answer: C — Dialectical behavior therapy

Rationale:
Dialectical behavior therapy (DBT) is specifically designed for borderline personality disorder and has strong evidence for reducing self-injury, suicidality, and emotional dysregulation.

References:
Kaplan & Sadock’s Synopsis of Psychiatry
Linehan MM research literature

Question 5

A child with ADHD develops new vocal tics after starting methylphenidate. What is the best management strategy?

A. Discontinue stimulant immediately
B. Switch to atomoxetine
C. Add clonidine or guanfacine
D. Continue without intervention

Correct Answer: C — Add clonidine or guanfacine

Rationale:
Alpha-2 agonists such as clonidine or guanfacine can treat both ADHD and tic disorders.

References:
Kaplan & Sadock’s Synopsis of Psychiatry
AACAP Practice Guidelines

Question 6

A patient taking sertraline develops agitation, hyperreflexia, diaphoresis, and tremor after adding linezolid. What condition is most likely?

A. Neuroleptic malignant syndrome
B. Serotonin syndrome
C. Anticholinergic toxicity
D. Lithium toxicity

Correct Answer: B — Serotonin syndrome

Rationale:
Linezolid is a reversible MAOI. Combined serotonergic activity with SSRIs can precipitate serotonin syndrome characterized by autonomic instability, neuromuscular hyperactivity, and mental status changes.

References:
Kaplan & Sadock’s Synopsis of Psychiatry
FDA Safety Information

Question 7

A patient with psychosis refuses treatment but is unable to understand consequences due to delusional thinking. Which ethical principle supports overriding refusal?

A. Autonomy
B. Beneficence
C. Justice
D. Nonmaleficence

Correct Answer: B — Beneficence

Rationale:
Beneficence supports acting in the patient’s best interest when decision-making capacity is impaired.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 8

Which medication has the strongest evidence for slowing cognitive decline in moderate-to-severe Alzheimer disease?

A. Memantine
B. Donepezil
C. Fluoxetine
D. Risperidone

Correct Answer: A — Memantine

Rationale:
Memantine is indicated for moderate-to-severe Alzheimer disease and can slow functional decline.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 9

A patient with major depressive disorder develops elevated mood, decreased sleep need, and increased goal-directed activity after starting fluoxetine. What is the most accurate interpretation?

A. Medication side effect only
B. Bipolar disorder unmasked
C. Normal antidepressant response
D. Substance intoxication

Correct Answer: B — Bipolar disorder unmasked

Rationale:
Antidepressants may precipitate mania in individuals with bipolar disorder, revealing underlying bipolar spectrum illness.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 10

Which medication is first-line for alcohol withdrawal prevention of seizures and delirium tremens?

A. Haloperidol
B. Lorazepam
C. Naltrexone
D. Disulfiram

Correct Answer: B — Lorazepam

Rationale:
Benzodiazepines are first-line treatment for alcohol withdrawal due to cross-tolerance with GABA receptors and seizure prevention.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 11

Which brain region is most associated with impaired fear extinction in PTSD?

A. Hippocampus
B. Amygdala
C. Prefrontal cortex
D. Cerebellum

Correct Answer: C — Prefrontal cortex

Rationale:
The medial prefrontal cortex regulates fear extinction and inhibitory control over amygdala activation.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 12

Which adverse effect is most associated with clozapine requiring routine laboratory monitoring?

A. Agranulocytosis
B. Hyperprolactinemia
C. Tardive dyskinesia
D. QTc prolongation

Correct Answer: A — Agranulocytosis

Rationale:
Clozapine carries risk of agranulocytosis, requiring REMS-mandated ANC monitoring.

References:
Kaplan & Sadock’s Synopsis of Psychiatry
Stahl’s Prescriber’s Guide

Question 13

Which medication is FDA-approved specifically for PTSD-related symptoms?

A. Sertraline
B. Lithium
C. Bupropion
D. Buspirone

Correct Answer: A — Sertraline

Rationale:
Sertraline and paroxetine are FDA-approved for PTSD treatment.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 14

Which medication is FDA-approved for irritability in autism spectrum disorder?

A. Risperidone
B. Lamotrigine
C. Fluoxetine
D. Methylphenidate

Correct Answer: A — Risperidone

Rationale:
Risperidone and aripiprazole are FDA-approved for irritability associated with autism.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 15

A patient on haloperidol develops rigidity, fever, and elevated CK. What is the priority treatment?

A. Dantrolene
B. Propranolol
C. Benztropine
D. Diphenhydramine

Correct Answer: A — Dantrolene

Rationale:
This presentation suggests neuroleptic malignant syndrome. Dantrolene and bromocriptine are treatments along with supportive care.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 16

Which study design provides the strongest evidence for causality in treatment effectiveness?

A. Randomized controlled trial
B. Cross-sectional study
C. Case series
D. Cohort study

Correct Answer: A — Randomized controlled trial

Rationale:
Randomized controlled trials minimize bias and provide the strongest causal inference for interventions.

References:
Evidence-Based Practice Literature

Question 17

Which factor is the strongest predictor of future suicide attempts?

A. Previous suicide attempt
B. Family history of depression
C. Financial stress
D. Substance use

Correct Answer: A — Previous suicide attempt

Rationale:
A prior suicide attempt is the strongest predictor of future suicide behavior.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 18

Which factor most strongly predicts positive psychotherapy outcomes across modalities?

A. Therapeutic alliance
B. Therapist theoretical orientation
C. Session frequency
D. Medication adherence

Correct Answer: A — Therapeutic alliance

Rationale:
The therapeutic alliance consistently predicts outcomes more than modality type.

References:
Psychotherapy Outcome Literature

Question 19

Which electrolyte abnormality is most associated with purging behaviors in bulimia nervosa?

A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypercalcemia

Correct Answer: B — Hypokalemia

Rationale:
Vomiting leads to potassium loss and metabolic alkalosis.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 20

Which medication is preferred for ADHD in a patient with substance use disorder risk?

A. Amphetamine salts
B. Methylphenidate
C. Atomoxetine
D. Dextroamphetamine

Correct Answer: C — Atomoxetine

Rationale:
Atomoxetine is non-stimulant with lower abuse potential.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 21

Which psychotherapy approach focuses on identifying and modifying automatic negative thought patterns?

A. Cognitive behavioral therapy
B. EMDR
C. Psychoanalysis
D. Emotional freedom technique

Correct Answer: A — Cognitive behavioral therapy

Rationale:
CBT emphasizes the connection between thoughts, emotions, and behaviors with structured cognitive restructuring techniques.

References:
Psychiatric-Mental Health Nurse (PMH-BC) Certification Review

Question 22

In acute mania with psychotic features, which medication class is commonly added for rapid symptom control?

A. Anxiolytics
B. Sedatives
C. Magnesium
D. Dopamine receptor antagonists or serotonin-dopamine antagonists

Correct Answer: D

Rationale:
Antipsychotic medications are frequently added to mood stabilizers during acute mania to achieve faster symptom control.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 23

Across most cultures worldwide, which substance is most commonly consumed?

A. Cannabis
B. Opioids
C. Alcohol
D. Hypnotics

Correct Answer: C — Alcohol

Rationale:
Alcohol is the most widely consumed intoxicating substance globally.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 24

Approximately what percentage of adolescents who die by suicide previously received psychiatric treatment?

A. 1%
B. 10%
C. 40%
D. 90%

Correct Answer: C — 40%

Rationale:
Approximately 40–50% of adolescents who die by suicide had prior contact with mental health services.

References:
Kaplan & Sadock’s Synopsis of Psychiatry

Question 25

When a clinician uses reflective listening to mirror a patient’s statements, which motivational interviewing principle is applied?

A. Roll with resistance
B. Develop discrepancy
C. Express empathy
D. Support self-efficacy

Correct Answer: C — Express empathy

Rationale:
Expressing empathy involves reflective listening and validation without judgment.

References:
Psychiatric-Mental Health Nurse (PMH-BC) Certification Review

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