1
(WGU D116) NURS 6800 ADVANCED
PHARMACOLOGY COMPREHENSIVE FINAL OA
EXAM
This guide contains 200 practice questions covering the essential content for the
WGU D116 / NURS 6800 Advanced Pharmacology final objective assessment.
Questions are organized by major topic areas and include detailed rationales to
reinforce key concepts for advanced practice nursing.
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Questions 1–20)
1. A patient with renal impairment is prescribed a medication that is primarily
eliminated by the kidneys. Which pharmacokinetic parameter is most likely to
be altered?
A) Volume of distribution
B) Bioavailability
C) Half-life
D) Protein binding
✔✔Correct Answer✔✔ C
Rationale: Renal impairment decreases drug elimination, prolonging half-life and
increasing drug accumulation. Volume of distribution and protein binding may be
altered but not as consistently as half-life. Bioavailability primarily depends on
absorption and first-pass metabolism.
2. A drug has a half-life of 12 hours. Approximately how long will it take to reach
steady state?
,2
A) 24 hours
B) 36 hours
C) 48 hours
D) 60 hours
✔✔Correct Answer✔✔ D
Rationale: Steady state is achieved after 4–5 half-lives. For a 12-hour half-life, 4 ×
12 = 48 hours, 5 × 12 = 60 hours. Steady state is typically reached by 60 hours (2.5
days).
3. A patient has a genetic variation that results in decreased activity of CYP2D6
enzymes. Which drug effect is most likely?
A) Reduced therapeutic effect of prodrugs requiring CYP2D6 activation
B) Increased risk of toxicity for drugs metabolized by CYP2D6
C) Both A and B
D) No change
✔✔Correct Answer✔✔ C
Rationale: CYP2D6 poor metabolizers have reduced metabolism of drugs that are
substrates, leading to higher levels and toxicity for active drugs, and reduced
activation of prodrugs like codeine (which requires CYP2D6 to form morphine).
4. Which factor most significantly affects the volume of distribution (Vd) of a
drug?
A) Lipid solubility
B) Protein binding
C) Molecular weight
D) Route of administration
✔✔Correct Answer✔✔ A
,3
Rationale: Lipid-soluble drugs cross membranes readily and distribute into
tissues, increasing Vd. Protein binding and molecular weight influence distribution
but lipid solubility is the primary determinant.
5. A medication with high first-pass metabolism is administered via which route
to avoid this effect?
A) Oral
B) Sublingual
C) Rectal
D) Intravenous
✔✔Correct Answer✔✔ B
Rationale: Sublingual administration bypasses the portal circulation, avoiding
first-pass hepatic metabolism. Intravenous also bypasses, but sublingual is a
common alternative for drugs like nitroglycerin.
6. What is the primary mechanism of drug tolerance that requires increased
doses to achieve the same effect?
A) Increased metabolism
B) Down-regulation of receptors
C) Decreased absorption
D) Increased protein binding
✔✔Correct Answer✔✔ B
Rationale: Pharmacodynamic tolerance often involves receptor down-regulation
(e.g., opioids, benzodiazepines). Pharmacokinetic tolerance (increased
metabolism) also occurs but receptor changes are a key mechanism.
7. A drug with a narrow therapeutic index requires monitoring of:
A) Subjective effects only
B) Serum drug levels
, 4
C) Urine output
D) Blood pressure
✔✔Correct Answer✔✔ B
Rationale: Narrow therapeutic index drugs (e.g., lithium, warfarin, digoxin) have a
small margin between therapeutic and toxic doses, necessitating serum level
monitoring.
8. Which statement best describes the concept of “efficacy”?
A) The amount of drug needed to produce an effect
B) The maximal effect a drug can produce
C) The speed of onset of drug action
D) The ability of a drug to bind to a receptor
✔✔Correct Answer✔✔ B
Rationale: Efficacy refers to the maximum response achievable from a drug.
Potency refers to the amount needed to produce a given effect. Affinity refers to
binding strength.
9. A patient with hepatic cirrhosis is prescribed a drug extensively metabolized
by the liver. Which adjustment is most appropriate?
A) Increase dose due to increased metabolism
B) Decrease dose or extend dosing interval
C) No adjustment needed
D) Administer via IM route
✔✔Correct Answer✔✔ B
Rationale: Liver impairment reduces metabolism, increasing drug levels. Dose
reduction or extended intervals are often required.
(WGU D116) NURS 6800 ADVANCED
PHARMACOLOGY COMPREHENSIVE FINAL OA
EXAM
This guide contains 200 practice questions covering the essential content for the
WGU D116 / NURS 6800 Advanced Pharmacology final objective assessment.
Questions are organized by major topic areas and include detailed rationales to
reinforce key concepts for advanced practice nursing.
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Questions 1–20)
1. A patient with renal impairment is prescribed a medication that is primarily
eliminated by the kidneys. Which pharmacokinetic parameter is most likely to
be altered?
A) Volume of distribution
B) Bioavailability
C) Half-life
D) Protein binding
✔✔Correct Answer✔✔ C
Rationale: Renal impairment decreases drug elimination, prolonging half-life and
increasing drug accumulation. Volume of distribution and protein binding may be
altered but not as consistently as half-life. Bioavailability primarily depends on
absorption and first-pass metabolism.
2. A drug has a half-life of 12 hours. Approximately how long will it take to reach
steady state?
,2
A) 24 hours
B) 36 hours
C) 48 hours
D) 60 hours
✔✔Correct Answer✔✔ D
Rationale: Steady state is achieved after 4–5 half-lives. For a 12-hour half-life, 4 ×
12 = 48 hours, 5 × 12 = 60 hours. Steady state is typically reached by 60 hours (2.5
days).
3. A patient has a genetic variation that results in decreased activity of CYP2D6
enzymes. Which drug effect is most likely?
A) Reduced therapeutic effect of prodrugs requiring CYP2D6 activation
B) Increased risk of toxicity for drugs metabolized by CYP2D6
C) Both A and B
D) No change
✔✔Correct Answer✔✔ C
Rationale: CYP2D6 poor metabolizers have reduced metabolism of drugs that are
substrates, leading to higher levels and toxicity for active drugs, and reduced
activation of prodrugs like codeine (which requires CYP2D6 to form morphine).
4. Which factor most significantly affects the volume of distribution (Vd) of a
drug?
A) Lipid solubility
B) Protein binding
C) Molecular weight
D) Route of administration
✔✔Correct Answer✔✔ A
,3
Rationale: Lipid-soluble drugs cross membranes readily and distribute into
tissues, increasing Vd. Protein binding and molecular weight influence distribution
but lipid solubility is the primary determinant.
5. A medication with high first-pass metabolism is administered via which route
to avoid this effect?
A) Oral
B) Sublingual
C) Rectal
D) Intravenous
✔✔Correct Answer✔✔ B
Rationale: Sublingual administration bypasses the portal circulation, avoiding
first-pass hepatic metabolism. Intravenous also bypasses, but sublingual is a
common alternative for drugs like nitroglycerin.
6. What is the primary mechanism of drug tolerance that requires increased
doses to achieve the same effect?
A) Increased metabolism
B) Down-regulation of receptors
C) Decreased absorption
D) Increased protein binding
✔✔Correct Answer✔✔ B
Rationale: Pharmacodynamic tolerance often involves receptor down-regulation
(e.g., opioids, benzodiazepines). Pharmacokinetic tolerance (increased
metabolism) also occurs but receptor changes are a key mechanism.
7. A drug with a narrow therapeutic index requires monitoring of:
A) Subjective effects only
B) Serum drug levels
, 4
C) Urine output
D) Blood pressure
✔✔Correct Answer✔✔ B
Rationale: Narrow therapeutic index drugs (e.g., lithium, warfarin, digoxin) have a
small margin between therapeutic and toxic doses, necessitating serum level
monitoring.
8. Which statement best describes the concept of “efficacy”?
A) The amount of drug needed to produce an effect
B) The maximal effect a drug can produce
C) The speed of onset of drug action
D) The ability of a drug to bind to a receptor
✔✔Correct Answer✔✔ B
Rationale: Efficacy refers to the maximum response achievable from a drug.
Potency refers to the amount needed to produce a given effect. Affinity refers to
binding strength.
9. A patient with hepatic cirrhosis is prescribed a drug extensively metabolized
by the liver. Which adjustment is most appropriate?
A) Increase dose due to increased metabolism
B) Decrease dose or extend dosing interval
C) No adjustment needed
D) Administer via IM route
✔✔Correct Answer✔✔ B
Rationale: Liver impairment reduces metabolism, increasing drug levels. Dose
reduction or extended intervals are often required.
