NSG 552 Psychopharmacology Exam 1, 2 & 3
Complete Exam Bank: 400+ Questions with Correct
Answers, NGN Case Scenarios & Detailed Rationales |
2026/2027 Exam 1, 2 & 3 Study Guide for PMHNP
Certification | Guaranteed Pass
1. Which pharmacokinetic phase involves the movement of a drug from its
site of administration into the bloodstream?
A) Distribution
B) Absorption
C) Metabolism
D) Excretion
Answer: B
Rationale: Absorption is the process by which a drug enters the bloodstream
from its site of administration.
2. A drug with a narrow therapeutic index requires:
A) Less frequent monitoring
B) Close monitoring of serum drug levels
C) Higher doses for efficacy
D) No dose adjustments
Answer: B
,Rationale: Narrow therapeutic index drugs have a small margin between
therapeutic and toxic effects.
3. Which route of administration has 100% bioavailability?
A) Oral
B) Intramuscular
C) Intravenous
D) Subcutaneous
Answer: C
Rationale: IV administration bypasses absorption barriers, delivering the full dose
directly into circulation.
4. The first-pass effect primarily affects drugs administered via which route?
A) Intravenous
B) Oral
C) Sublingual
D) Transdermal
Answer: B
Rationale: Orally administered drugs pass through the liver before reaching
systemic circulation, reducing bioavailability.
2
,5. A drug that binds to a receptor and produces a maximal response is called
a:
A) Partial agonist
B) Full agonist
C) Antagonist
D) Inverse agonist
Answer: B
Rationale: Full agonists activate receptors to produce the maximum possible
response.
6. Which of the following is a competitive antagonist?
A) Binds to a different site than the agonist
B) Binds to the same site as the agonist, preventing its action
C) Produces a response without an agonist
D) Enhances the effect of the agonist
Answer: B
Rationale: Competitive antagonists compete with agonists for the same receptor
site.
7. A patient with renal impairment may require dose adjustment because:
A) Absorption is increased
B) Renal excretion of drugs is decreased
C) Hepatic metabolism is enhanced
3
, D) Protein binding is increased
Answer: B
Rationale: Impaired kidney function reduces drug clearance, increasing risk of
toxicity.
8. Which cytochrome P450 enzyme is responsible for metabolizing the
majority of drugs?
A) CYP1A2
B) CYP3A4
C) CYP2D6
D) CYP2C9
Answer: B
Rationale: CYP3A4 metabolizes approximately 50% of all drugs, making it the
most important CYP enzyme.
9. Grapefruit juice inhibits which CYP enzyme, leading to increased drug
levels?
A) CYP1A2
B) CYP3A4
C) CYP2E1
D) CYP2A6
Answer: B
4
Complete Exam Bank: 400+ Questions with Correct
Answers, NGN Case Scenarios & Detailed Rationales |
2026/2027 Exam 1, 2 & 3 Study Guide for PMHNP
Certification | Guaranteed Pass
1. Which pharmacokinetic phase involves the movement of a drug from its
site of administration into the bloodstream?
A) Distribution
B) Absorption
C) Metabolism
D) Excretion
Answer: B
Rationale: Absorption is the process by which a drug enters the bloodstream
from its site of administration.
2. A drug with a narrow therapeutic index requires:
A) Less frequent monitoring
B) Close monitoring of serum drug levels
C) Higher doses for efficacy
D) No dose adjustments
Answer: B
,Rationale: Narrow therapeutic index drugs have a small margin between
therapeutic and toxic effects.
3. Which route of administration has 100% bioavailability?
A) Oral
B) Intramuscular
C) Intravenous
D) Subcutaneous
Answer: C
Rationale: IV administration bypasses absorption barriers, delivering the full dose
directly into circulation.
4. The first-pass effect primarily affects drugs administered via which route?
A) Intravenous
B) Oral
C) Sublingual
D) Transdermal
Answer: B
Rationale: Orally administered drugs pass through the liver before reaching
systemic circulation, reducing bioavailability.
2
,5. A drug that binds to a receptor and produces a maximal response is called
a:
A) Partial agonist
B) Full agonist
C) Antagonist
D) Inverse agonist
Answer: B
Rationale: Full agonists activate receptors to produce the maximum possible
response.
6. Which of the following is a competitive antagonist?
A) Binds to a different site than the agonist
B) Binds to the same site as the agonist, preventing its action
C) Produces a response without an agonist
D) Enhances the effect of the agonist
Answer: B
Rationale: Competitive antagonists compete with agonists for the same receptor
site.
7. A patient with renal impairment may require dose adjustment because:
A) Absorption is increased
B) Renal excretion of drugs is decreased
C) Hepatic metabolism is enhanced
3
, D) Protein binding is increased
Answer: B
Rationale: Impaired kidney function reduces drug clearance, increasing risk of
toxicity.
8. Which cytochrome P450 enzyme is responsible for metabolizing the
majority of drugs?
A) CYP1A2
B) CYP3A4
C) CYP2D6
D) CYP2C9
Answer: B
Rationale: CYP3A4 metabolizes approximately 50% of all drugs, making it the
most important CYP enzyme.
9. Grapefruit juice inhibits which CYP enzyme, leading to increased drug
levels?
A) CYP1A2
B) CYP3A4
C) CYP2E1
D) CYP2A6
Answer: B
4
