NSG 552 PSYCHOPHARMACOLOGY EXAMS | 2026/2027 VERIFIED
MCQs | 150 QUESTIONS AND ANSWERS WITH RATIONALES | PMHNP
CLINICAL KNOWLEDGE EXCELLENCE |ALREADY GRADED A+
|GUARANTEED SUCCESS
INTRODUCTION
This full exam set includes 150 verified questions and correct answers (divided
across Exam 1, Exam 2, and Exam 3) from the NSG 552 Psychopharmacology course at Wilkes
University, updated for the 2025/2026 academic year. Topics span neurotransmitters,
antidepressants, antipsychotics, anxiolytics, mood stabilizers, pharmacokinetics, adverse effects,
and clinical application in psychiatric nurse practitioner (PMHNP) practice.
EXAM 1: FOUNDATIONS OF PSYCHOPHARMACOLOGY
Description: This examination covers foundational concepts including
pharmacokinetics, pharmacodynamics, neurotransmitter systems, receptor
mechanisms, and basic principles of drug action. Questions address the core
science underlying psychiatric medication management and prepare the PMHNP
for advanced clinical decision-making.
Question 1
What does pharmacokinetics describe?
A) The drug's effect on the body
B) How the body processes the drug [CORRECT]
C) The drug's chemical composition
D) The therapeutic outcome
Rationale: Pharmacokinetics involves absorption, distribution, metabolism, and
excretion.
Question 2
What is the primary mechanism of first-generation antipsychotics?
A) Block serotonin receptors only
B) Strong D2 receptor blockade [CORRECT]
C) Weak D2 receptor binding
1
,D) GABA enhancement
Rationale: They primarily target D2 dopamine receptors, causing extrapyramidal
symptoms.
Question 3
Which neurotransmitter is most implicated in the pathophysiology of depression?
A) Acetylcholine
B) Gamma-aminobutyric acid (GABA)
C) Serotonin [CORRECT]
D) Histamine
Rationale: Serotonin, along with norepinephrine and dopamine, plays a central
role in mood regulation.
Question 4
What is the half-life of a drug?
A) The time required for the drug to reach peak plasma concentration
B) The time required for the drug to be completely eliminated
C) The time required for 50% of the drug to be eliminated from the body
[CORRECT]
D) The time required for the drug to bind to its receptor
Rationale: Half-life (t1/2) is the time needed for plasma concentration to fall by
50%.
Question 5
Which of the following is an example of a competitive antagonist?
A) A drug that binds irreversibly to the receptor
B) A drug that binds to the same site as the agonist and prevents activation
[CORRECT]
C) A drug that binds to a different site and enhances agonist effect
D) A drug that activates the receptor with maximal efficacy
Rationale: Competitive antagonists bind reversibly to the active site, blocking
agonist binding.
2
,Question 6
What is the primary mechanism of action of SSRIs?
A) Blockade of norepinephrine reuptake
B) Inhibition of serotonin reuptake [CORRECT]
C) Inhibition of monoamine oxidase
D) Partial agonism at dopamine receptors
Rationale: SSRIs selectively inhibit the serotonin transporter (SERT), increasing
synaptic serotonin.
Question 7
Which enzyme is responsible for the breakdown of monoamines in the synaptic
cleft?
A) Acetylcholinesterase
B) Catechol-O-methyltransferase (COMT) [CORRECT]
C) Cytochrome P450
D) Glucuronosyltransferase
Rationale: COMT and MAO are major enzymes that metabolize catecholamines
and serotonin.
Question 8
A drug that has high affinity but low intrinsic activity at a receptor is best
described as:
A) Full agonist
B) Partial agonist [CORRECT]
C) Antagonist
D) Inverse agonist
Rationale: Partial agonists bind with high affinity but produce a submaximal
response.
Question 9
What is the volume of distribution (Vd) of a drug?
A) The amount of drug in the plasma
B) The apparent space in the body available to contain the drug [CORRECT]
3
, C) The rate of drug elimination
D) The fraction of drug bound to proteins
Rationale: Vd relates the total amount of drug in the body to its plasma
concentration.
Question 10
Which neurotransmitter is primarily inhibitory in the central nervous system?
A) Glutamate
B) Dopamine
C) GABA [CORRECT]
D) Norepinephrine
Rationale: GABA is the main inhibitory neurotransmitter, reducing neuronal
excitability.
Question 11
What is the therapeutic index of a drug?
A) The ratio of toxic dose to effective dose [CORRECT]
B) The dose required for 50% of maximal effect
C) The time to peak effect
D) The rate of absorption
Rationale: Therapeutic index (TI) = TD50/ED50; a narrow TI indicates a small
safety margin.
Question 12
Which cytochrome P450 enzyme is most commonly involved in drug interactions?
A) CYP1A2
B) CYP2D6 [CORRECT]
C) CYP3A4
D) CYP2E1
Rationale: CYP3A4 metabolizes ~50% of all drugs, but CYP2D6 is also clinically
important due to genetic polymorphisms.
Question 13
4
MCQs | 150 QUESTIONS AND ANSWERS WITH RATIONALES | PMHNP
CLINICAL KNOWLEDGE EXCELLENCE |ALREADY GRADED A+
|GUARANTEED SUCCESS
INTRODUCTION
This full exam set includes 150 verified questions and correct answers (divided
across Exam 1, Exam 2, and Exam 3) from the NSG 552 Psychopharmacology course at Wilkes
University, updated for the 2025/2026 academic year. Topics span neurotransmitters,
antidepressants, antipsychotics, anxiolytics, mood stabilizers, pharmacokinetics, adverse effects,
and clinical application in psychiatric nurse practitioner (PMHNP) practice.
EXAM 1: FOUNDATIONS OF PSYCHOPHARMACOLOGY
Description: This examination covers foundational concepts including
pharmacokinetics, pharmacodynamics, neurotransmitter systems, receptor
mechanisms, and basic principles of drug action. Questions address the core
science underlying psychiatric medication management and prepare the PMHNP
for advanced clinical decision-making.
Question 1
What does pharmacokinetics describe?
A) The drug's effect on the body
B) How the body processes the drug [CORRECT]
C) The drug's chemical composition
D) The therapeutic outcome
Rationale: Pharmacokinetics involves absorption, distribution, metabolism, and
excretion.
Question 2
What is the primary mechanism of first-generation antipsychotics?
A) Block serotonin receptors only
B) Strong D2 receptor blockade [CORRECT]
C) Weak D2 receptor binding
1
,D) GABA enhancement
Rationale: They primarily target D2 dopamine receptors, causing extrapyramidal
symptoms.
Question 3
Which neurotransmitter is most implicated in the pathophysiology of depression?
A) Acetylcholine
B) Gamma-aminobutyric acid (GABA)
C) Serotonin [CORRECT]
D) Histamine
Rationale: Serotonin, along with norepinephrine and dopamine, plays a central
role in mood regulation.
Question 4
What is the half-life of a drug?
A) The time required for the drug to reach peak plasma concentration
B) The time required for the drug to be completely eliminated
C) The time required for 50% of the drug to be eliminated from the body
[CORRECT]
D) The time required for the drug to bind to its receptor
Rationale: Half-life (t1/2) is the time needed for plasma concentration to fall by
50%.
Question 5
Which of the following is an example of a competitive antagonist?
A) A drug that binds irreversibly to the receptor
B) A drug that binds to the same site as the agonist and prevents activation
[CORRECT]
C) A drug that binds to a different site and enhances agonist effect
D) A drug that activates the receptor with maximal efficacy
Rationale: Competitive antagonists bind reversibly to the active site, blocking
agonist binding.
2
,Question 6
What is the primary mechanism of action of SSRIs?
A) Blockade of norepinephrine reuptake
B) Inhibition of serotonin reuptake [CORRECT]
C) Inhibition of monoamine oxidase
D) Partial agonism at dopamine receptors
Rationale: SSRIs selectively inhibit the serotonin transporter (SERT), increasing
synaptic serotonin.
Question 7
Which enzyme is responsible for the breakdown of monoamines in the synaptic
cleft?
A) Acetylcholinesterase
B) Catechol-O-methyltransferase (COMT) [CORRECT]
C) Cytochrome P450
D) Glucuronosyltransferase
Rationale: COMT and MAO are major enzymes that metabolize catecholamines
and serotonin.
Question 8
A drug that has high affinity but low intrinsic activity at a receptor is best
described as:
A) Full agonist
B) Partial agonist [CORRECT]
C) Antagonist
D) Inverse agonist
Rationale: Partial agonists bind with high affinity but produce a submaximal
response.
Question 9
What is the volume of distribution (Vd) of a drug?
A) The amount of drug in the plasma
B) The apparent space in the body available to contain the drug [CORRECT]
3
, C) The rate of drug elimination
D) The fraction of drug bound to proteins
Rationale: Vd relates the total amount of drug in the body to its plasma
concentration.
Question 10
Which neurotransmitter is primarily inhibitory in the central nervous system?
A) Glutamate
B) Dopamine
C) GABA [CORRECT]
D) Norepinephrine
Rationale: GABA is the main inhibitory neurotransmitter, reducing neuronal
excitability.
Question 11
What is the therapeutic index of a drug?
A) The ratio of toxic dose to effective dose [CORRECT]
B) The dose required for 50% of maximal effect
C) The time to peak effect
D) The rate of absorption
Rationale: Therapeutic index (TI) = TD50/ED50; a narrow TI indicates a small
safety margin.
Question 12
Which cytochrome P450 enzyme is most commonly involved in drug interactions?
A) CYP1A2
B) CYP2D6 [CORRECT]
C) CYP3A4
D) CYP2E1
Rationale: CYP3A4 metabolizes ~50% of all drugs, but CYP2D6 is also clinically
important due to genetic polymorphisms.
Question 13
4
