NURS 6521 ADV. PHARMACOLOGY FINAL EXAM 2026 | 300+
QUESTIONS AND CORRECT ANSWERS | ALREADY GRADED A+ |
LATEST RELEASE
NURS 6521 Advanced Pharmacology
Question 1
A patient with severe hepatic cirrhosis is prescribed a drug that undergoes extensive first-pass
metabolism. What is the most likely consequence?
A) Decreased bioavailability of the drug
B) Increased risk of subtherapeutic dosing only
C) Increased bioavailability and risk of toxicity
D) No change, since the liver does not affect oral drugs
E) Faster renal clearance of the drug
Correct Answer: C
Rationale: In liver failure, first-pass metabolism is impaired, so more active drug reaches systemic circulation,
increasing bioavailability and toxicity risk. Dose reduction is often needed.
Question 2
Which pharmacokinetic parameter best describes the percentage of an administered drug dose that
reaches systemic circulation unchanged?
A) Half-life
B) Bioavailability
C) Volume of distribution
D) Clearance
E) Therapeutic index
Correct Answer: B
Rationale: Bioavailability is the fraction of an administered dose that reaches systemic circulation unchanged;
IV drugs have 100% bioavailability by definition.
Question 3
A drug has a half-life of 6 hours. Approximately how long will it take to reach steady-state concentration
with regular dosing?
A) 6 hours
B) 12 hours
C) 24-30 hours
D) 48-72 hours
E) 1 week
Correct Answer: C
Rationale: Steady state is generally reached after 4-5 half-lives; 5 x 6 hours = 30 hours.
Question 4
A patient taking a highly protein-bound drug (warfarin) is started on another highly protein-bound drug.
What is the primary concern?
, A) Decreased renal excretion of both drugs
B) Displacement increasing free (active) drug concentration
C) Enhanced hepatic metabolism of both agents
D) Reduced absorption from the GI tract
E) Increased first-pass metabolism
Correct Answer: B
Rationale: When two highly protein-bound drugs compete for binding sites, one may be displaced, increasing
the free, pharmacologically active fraction and the risk of toxicity.
Question 5
Which route of administration bypasses first-pass hepatic metabolism?
A) Oral
B) Sublingual
C) Rectal (partial only)
D) Enteric-coated oral
E) All of the above bypass it equally
Correct Answer: B
Rationale: Sublingual administration allows drug absorption directly into systemic circulation via the oral
mucosa, bypassing hepatic first-pass metabolism.
Question 6
A patient with renal impairment is prescribed a drug that is primarily renally eliminated. What adjustment
is typically required?
A) Increase the dose
B) Decrease the dose or extend the dosing interval
C) No adjustment needed
D) Switch to IV route only
E) Double the loading dose
Correct Answer: B
Rationale: Reduced renal clearance in kidney impairment increases drug half-life, requiring dose reduction or
a
longer interval to prevent accumulation and toxicity.
Question 7
Which term describes the range between the minimum effective concentration and the minimum toxic
concentration of a drug?
A) Bioavailability
B) Therapeutic index
C) Volume of distribution
D) Clearance
E) Onset of action
Correct Answer: B
Rationale: The therapeutic index reflects the margin of safety between effective and toxic doses; a narrow
therapeutic index requires close monitoring (e.g., digoxin, lithium, warfarin).
,Question 8
Grapefruit juice is known to inhibit which enzyme system, increasing levels of many drugs?
A) CYP2D6
B) CYP3A4
C) CYP1A2
D) Glucuronyl transferase
E) Monoamine oxidase
Correct Answer: B
Rationale: Grapefruit juice inhibits intestinal CYP3A4, reducing first-pass metabolism of many drugs (e.g.,
statins, calcium channel blockers) and raising serum levels.
Question 9
A patient who is a CYP2D6 'poor metabolizer' is prescribed codeine for pain. What is the expected clinical
effect?
A) Enhanced analgesia due to increased morphine conversion
B) Reduced analgesic effect because codeine is not converted to morphine efficiently
C) Immediate toxicity from rapid conversion
D) No effect on pain but increased sedation
E) Increased risk of respiratory depression only
Correct Answer: B
Rationale: Codeine requires CYP2D6 to convert to its active metabolite, morphine. Poor metabolizers get
inadequate pain relief because little active drug is formed.
Question 10
Zero-order kinetics means that:
A) A constant fraction of drug is eliminated per unit time
B) A constant amount of drug is eliminated per unit time regardless of concentration
C) Elimination rate increases proportionally with dose
D) The drug is completely absorbed instantly
E) Half-life remains constant regardless of dose
Correct Answer: B
Rationale: In zero-order kinetics (e.g., high-dose phenytoin, alcohol), elimination is saturated and a fixed
amount is cleared per unit time, so half-life is not constant.
Question 11
Which factor most affects the volume of distribution of a highly lipophilic drug in an obese patient?
A) Decreased volume of distribution due to less fat
B) Increased volume of distribution due to more adipose tissue for storage
C) No change compared to normal-weight patients
D) Volume of distribution only depends on renal function
E) Lipophilic drugs are not distributed to fat
Correct Answer: B
Rationale: Lipophilic drugs distribute extensively into adipose tissue, so obese patients often have an
increased volume of distribution, prolonging the drug's presence in the body.
, Question 12
A prodrug requires which process before it becomes pharmacologically active?
A) Renal filtration only
B) Metabolic conversion (usually hepatic)
C) Protein binding
D) Passive diffusion across the blood-brain barrier
E) Refrigeration
Correct Answer: B
Rationale: Prodrugs are inactive as administered and require metabolic biotransformation, typically hepatic, to
form the active compound (e.g., enalapril to enalaprilat).
Question 13
Which of the following best describes pharmacodynamics?
A) How the body absorbs and eliminates a drug
B) The effect of the drug on the body and its mechanism of action
C) The percentage of drug bound to plasma proteins
D) The rate of renal clearance
E) The route of administration
Correct Answer: B
Rationale: Pharmacodynamics refers to what the drug does to the body, including receptor binding,
mechanism of action, and dose-response relationships.
Question 14
A patient develops tolerance to opioid analgesics after prolonged use. This is best explained by:
A) Increased renal clearance of the drug
B) Down-regulation of opioid receptors requiring higher doses for the same effect
C) Enhanced first-pass metabolism
D) Decreased volume of distribution
E) Increased protein binding
Correct Answer: B
Rationale: Chronic opioid exposure leads to receptor down-regulation and desensitization, producing tolerance
and the need for escalating doses to achieve the same analgesic effect.
Question 15
Which laboratory finding would most concern a nurse practitioner monitoring a patient on long-term
therapy with a drug that has a narrow therapeutic index?
A) Slightly elevated cholesterol
B) Serum drug level near the upper limit of the therapeutic range with new symptoms
C) A single normal complete blood count
D) Mild seasonal allergies
E) Stable blood pressure readings
Correct Answer: B
Rationale: Narrow therapeutic index drugs (e.g., digoxin, lithium, theophylline) require close monitoring since a
small increase above the upper therapeutic limit can cause toxicity.
QUESTIONS AND CORRECT ANSWERS | ALREADY GRADED A+ |
LATEST RELEASE
NURS 6521 Advanced Pharmacology
Question 1
A patient with severe hepatic cirrhosis is prescribed a drug that undergoes extensive first-pass
metabolism. What is the most likely consequence?
A) Decreased bioavailability of the drug
B) Increased risk of subtherapeutic dosing only
C) Increased bioavailability and risk of toxicity
D) No change, since the liver does not affect oral drugs
E) Faster renal clearance of the drug
Correct Answer: C
Rationale: In liver failure, first-pass metabolism is impaired, so more active drug reaches systemic circulation,
increasing bioavailability and toxicity risk. Dose reduction is often needed.
Question 2
Which pharmacokinetic parameter best describes the percentage of an administered drug dose that
reaches systemic circulation unchanged?
A) Half-life
B) Bioavailability
C) Volume of distribution
D) Clearance
E) Therapeutic index
Correct Answer: B
Rationale: Bioavailability is the fraction of an administered dose that reaches systemic circulation unchanged;
IV drugs have 100% bioavailability by definition.
Question 3
A drug has a half-life of 6 hours. Approximately how long will it take to reach steady-state concentration
with regular dosing?
A) 6 hours
B) 12 hours
C) 24-30 hours
D) 48-72 hours
E) 1 week
Correct Answer: C
Rationale: Steady state is generally reached after 4-5 half-lives; 5 x 6 hours = 30 hours.
Question 4
A patient taking a highly protein-bound drug (warfarin) is started on another highly protein-bound drug.
What is the primary concern?
, A) Decreased renal excretion of both drugs
B) Displacement increasing free (active) drug concentration
C) Enhanced hepatic metabolism of both agents
D) Reduced absorption from the GI tract
E) Increased first-pass metabolism
Correct Answer: B
Rationale: When two highly protein-bound drugs compete for binding sites, one may be displaced, increasing
the free, pharmacologically active fraction and the risk of toxicity.
Question 5
Which route of administration bypasses first-pass hepatic metabolism?
A) Oral
B) Sublingual
C) Rectal (partial only)
D) Enteric-coated oral
E) All of the above bypass it equally
Correct Answer: B
Rationale: Sublingual administration allows drug absorption directly into systemic circulation via the oral
mucosa, bypassing hepatic first-pass metabolism.
Question 6
A patient with renal impairment is prescribed a drug that is primarily renally eliminated. What adjustment
is typically required?
A) Increase the dose
B) Decrease the dose or extend the dosing interval
C) No adjustment needed
D) Switch to IV route only
E) Double the loading dose
Correct Answer: B
Rationale: Reduced renal clearance in kidney impairment increases drug half-life, requiring dose reduction or
a
longer interval to prevent accumulation and toxicity.
Question 7
Which term describes the range between the minimum effective concentration and the minimum toxic
concentration of a drug?
A) Bioavailability
B) Therapeutic index
C) Volume of distribution
D) Clearance
E) Onset of action
Correct Answer: B
Rationale: The therapeutic index reflects the margin of safety between effective and toxic doses; a narrow
therapeutic index requires close monitoring (e.g., digoxin, lithium, warfarin).
,Question 8
Grapefruit juice is known to inhibit which enzyme system, increasing levels of many drugs?
A) CYP2D6
B) CYP3A4
C) CYP1A2
D) Glucuronyl transferase
E) Monoamine oxidase
Correct Answer: B
Rationale: Grapefruit juice inhibits intestinal CYP3A4, reducing first-pass metabolism of many drugs (e.g.,
statins, calcium channel blockers) and raising serum levels.
Question 9
A patient who is a CYP2D6 'poor metabolizer' is prescribed codeine for pain. What is the expected clinical
effect?
A) Enhanced analgesia due to increased morphine conversion
B) Reduced analgesic effect because codeine is not converted to morphine efficiently
C) Immediate toxicity from rapid conversion
D) No effect on pain but increased sedation
E) Increased risk of respiratory depression only
Correct Answer: B
Rationale: Codeine requires CYP2D6 to convert to its active metabolite, morphine. Poor metabolizers get
inadequate pain relief because little active drug is formed.
Question 10
Zero-order kinetics means that:
A) A constant fraction of drug is eliminated per unit time
B) A constant amount of drug is eliminated per unit time regardless of concentration
C) Elimination rate increases proportionally with dose
D) The drug is completely absorbed instantly
E) Half-life remains constant regardless of dose
Correct Answer: B
Rationale: In zero-order kinetics (e.g., high-dose phenytoin, alcohol), elimination is saturated and a fixed
amount is cleared per unit time, so half-life is not constant.
Question 11
Which factor most affects the volume of distribution of a highly lipophilic drug in an obese patient?
A) Decreased volume of distribution due to less fat
B) Increased volume of distribution due to more adipose tissue for storage
C) No change compared to normal-weight patients
D) Volume of distribution only depends on renal function
E) Lipophilic drugs are not distributed to fat
Correct Answer: B
Rationale: Lipophilic drugs distribute extensively into adipose tissue, so obese patients often have an
increased volume of distribution, prolonging the drug's presence in the body.
, Question 12
A prodrug requires which process before it becomes pharmacologically active?
A) Renal filtration only
B) Metabolic conversion (usually hepatic)
C) Protein binding
D) Passive diffusion across the blood-brain barrier
E) Refrigeration
Correct Answer: B
Rationale: Prodrugs are inactive as administered and require metabolic biotransformation, typically hepatic, to
form the active compound (e.g., enalapril to enalaprilat).
Question 13
Which of the following best describes pharmacodynamics?
A) How the body absorbs and eliminates a drug
B) The effect of the drug on the body and its mechanism of action
C) The percentage of drug bound to plasma proteins
D) The rate of renal clearance
E) The route of administration
Correct Answer: B
Rationale: Pharmacodynamics refers to what the drug does to the body, including receptor binding,
mechanism of action, and dose-response relationships.
Question 14
A patient develops tolerance to opioid analgesics after prolonged use. This is best explained by:
A) Increased renal clearance of the drug
B) Down-regulation of opioid receptors requiring higher doses for the same effect
C) Enhanced first-pass metabolism
D) Decreased volume of distribution
E) Increased protein binding
Correct Answer: B
Rationale: Chronic opioid exposure leads to receptor down-regulation and desensitization, producing tolerance
and the need for escalating doses to achieve the same analgesic effect.
Question 15
Which laboratory finding would most concern a nurse practitioner monitoring a patient on long-term
therapy with a drug that has a narrow therapeutic index?
A) Slightly elevated cholesterol
B) Serum drug level near the upper limit of the therapeutic range with new symptoms
C) A single normal complete blood count
D) Mild seasonal allergies
E) Stable blood pressure readings
Correct Answer: B
Rationale: Narrow therapeutic index drugs (e.g., digoxin, lithium, theophylline) require close monitoring since a
small increase above the upper therapeutic limit can cause toxicity.
