NR 565 ADVANCED PHARMACOLOGY FINAL EXAM
PREPARATION | 300 PRACTICE QUESTIONS
COVERING PHARMACOKINETICS, CNS DRUGS,
ENDOCRINE, RESPIRATORY, GI, ANTI-INFECTIVES,
AND SPECIAL POPULATIONS | WITH VERIFIED
ANSWERS AND RATIONALES FOR CHAMBERLAIN
UNIVERSITY COLLEGE OF NURSING | MOST RECENT |
GRADED A+ | GUARANTEED PASS
Section 1: Pharmacokinetics & Pharmacodynamics (Q1–Q16)
Q1. A drug has a half-life of 6 hours. Approximately how long will it take to
reach steady-state plasma concentration with a fixed dosing regimen?
A. 6 hours
B. 12 hours
C. 30 hours
D. 60 hours
Correct Answer: C. 30 hours
Rationale: It takes approximately 5 half-lives to reach steady state, so 5 × 6 hours =
30 hours. This principle applies to drug accumulation and clearance; patients on
medications like antidepressants need to reach steady state before dose adjustments
are evaluated .
Q2. A 70-year-old patient with chronic kidney disease (eGFR 30 mL/min) is
prescribed a drug primarily renally excreted unchanged. Compared to a patient
with normal renal function, this patient will likely require:
A. A higher dose and more frequent administration
B. A lower dose and/or less frequent administration
C. The same dose with increased fluid intake
D. No dose adjustment because age does not affect renal excretion
Correct Answer: B. A lower dose and/or less frequent administration
Rationale: Renal impairment reduces drug clearance, leading to accumulation and
toxicity risk. The standard approach is to reduce the dose, extend the dosing interval,
or both—depending on the drug's therapeutic index and severity of impairment .
,Q3. The therapeutic index of a drug is defined as:
A. The ratio of the minimum effective dose to the maximum tolerated dose
B. The ratio of the toxic dose to the effective dose for 50% of the population
C. The difference between peak and trough drug concentrations
D. The ratio of the drug's half-life to its dosing interval
Correct Answer: B. The ratio of the toxic dose to the effective dose for 50% of
the population
Rationale: The therapeutic index (TI) is TD50/ED50. A wide TI (e.g., penicillin)
indicates relative safety; a narrow TI (e.g., digoxin, lithium, warfarin) requires close
monitoring because the toxic dose is close to the therapeutic dose .
Q4. A drug that binds to a receptor and produces a biological response is best
described as a:
A. Antagonist
B. Inverse agonist
C. Agonist
D. Allosteric modulator
Correct Answer: C. Agonist
Rationale: An agonist binds to a receptor and activates it, producing a response
(e.g., albuterol binding to beta-2 receptors causing bronchodilation). An antagonist
blocks receptor activity without producing a response .
Q5. A 65-year-old male with cirrhosis is prescribed a medication that undergoes
extensive first-pass hepatic metabolism. The NP understands that the
bioavailability of this medication will be affected by which alteration?
A. Decreased absorption from the GI tract
B. Reduced first-pass metabolism leading to increased bioavailability
C. Enhanced renal elimination compensating for hepatic impairment
D. Increased protein binding reducing free drug concentration
Correct Answer: B. Reduced first-pass metabolism leading to increased
bioavailability
Rationale: In cirrhosis, first-pass hepatic metabolism is reduced due to damaged
hepatocytes and portosystemic shunting, increasing bioavailability. This requires
dose reduction to avoid toxicity .
Q6. A patient receiving intravenous gentamicin has toxic serum drug levels
despite correct dosing and previous tolerance. What is a probable cause?
A. A loading dose was not given
B. The drug was not completely dissolved in the IV solution
,C. The patient is taking another medication that binds to serum albumin
D. The medication is being given at a frequency longer than its half-life
Correct Answer: C. The patient is taking another medication that binds to serum
albumin
Rationale: Drugs that compete for plasma albumin binding sites can displace
gentamicin, increasing free drug levels and causing toxicity despite correct dosing .
Q7. The nurse administers multiple medications, two of which compete for
plasma albumin receptor sites. What should the nurse anticipate? (Select all
that apply)
A. Binding of one or both agents will be reduced
B. Plasma levels of free drug will rise
C. Plasma levels of free drug will fall
D. The increase in free drug will intensify effects
E. The increase in bound drug will intensify effects
Correct Answer: A, B, D
Rationale: When drugs compete for albumin binding, protein binding is reduced,
free drug levels rise, and effects intensify. Only free (unbound) drug is
pharmacologically active .
Q8. A patient reports becoming "immune" to a medication because it no longer
works. The NP recognizes this decreased effectiveness is likely caused by:
A. Antagonists produced by the body that compete with the drug for receptor sites
B. Decreased selectivity of receptor sites
C. Desensitization of receptor sites by continual exposure to the drug
D. Synthesis of more receptor sites in response to the medication
Correct Answer: C. Desensitization of receptor sites by continual exposure to
the drug
Rationale: Receptor desensitization occurs with prolonged drug exposure, reducing
responsiveness. This is a common mechanism of drug tolerance .
Q9. A patient taking morphine for pain asks how a pain medication can also
cause constipation. What does the nurse know about morphine?
A. It binds to different types of receptors in the body
B. It can cause constipation in toxic doses
C. It causes only one type of response, and constipation is coincidental
D. It is selective to receptors that regulate more than one body process
Correct Answer: D. It is selective to receptors that regulate more than one body
process
, Rationale: Morphine binds to opioid receptors that regulate multiple processes
including pain perception and GI motility. Drugs can affect different systems through
the same receptor type .
Q10. When administering medications to infants, which considerations are
important? (Select all that apply)
A. Breast-feeding infants are more likely to develop toxicity with lipid-soluble drugs
B. Immaturity of renal function causes infants to excrete drugs less efficiently
C. Infants have immature livers, which slows drug metabolism
D. Infants are more sensitive to CNS-acting medications
E. Oral medications are contraindicated in infants
Correct Answer: B, C, D
Rationale: Infants have immature liver and kidney function, slowing metabolism and
excretion. They are also more sensitive to CNS-acting medications. Lipid-soluble drug
transfer to breast milk is more related to maternal drug levels than infant toxicity risk
from breastfeeding .
Q11. A 42-year-old female on warfarin 5 mg daily for atrial fibrillation is newly
prescribed amiodarone for rate control. The NP recognizes this interaction is
mediated through which mechanism?
A. Amiodarone increases warfarin metabolism via CYP450 induction
B. Amiodarone inhibits warfarin metabolism via CYP2C9 inhibition
C. Amiodarone displaces warfarin from plasma protein binding sites
D. Amiodarone reduces warfarin absorption from the GI tract
Correct Answer: B. Amiodarone inhibits warfarin metabolism via CYP2C9
inhibition
Rationale: Amiodarone is a potent CYP2C9 inhibitor that reduces warfarin
metabolism, leading to increased INR and bleeding risk. The warfarin dose typically
needs to be reduced by 30–50% .
Q12. Which of the following are common side effects of ACE inhibitors?
A. Hyperkalemia
B. Dry cough
C. Hypotension
D. Bradycardia
Correct Answer: A, B, C
Rationale: ACE inhibitors block angiotensin I to II conversion, reducing
vasoconstriction (causing hypotension), increasing potassium levels (hyperkalemia),
PREPARATION | 300 PRACTICE QUESTIONS
COVERING PHARMACOKINETICS, CNS DRUGS,
ENDOCRINE, RESPIRATORY, GI, ANTI-INFECTIVES,
AND SPECIAL POPULATIONS | WITH VERIFIED
ANSWERS AND RATIONALES FOR CHAMBERLAIN
UNIVERSITY COLLEGE OF NURSING | MOST RECENT |
GRADED A+ | GUARANTEED PASS
Section 1: Pharmacokinetics & Pharmacodynamics (Q1–Q16)
Q1. A drug has a half-life of 6 hours. Approximately how long will it take to
reach steady-state plasma concentration with a fixed dosing regimen?
A. 6 hours
B. 12 hours
C. 30 hours
D. 60 hours
Correct Answer: C. 30 hours
Rationale: It takes approximately 5 half-lives to reach steady state, so 5 × 6 hours =
30 hours. This principle applies to drug accumulation and clearance; patients on
medications like antidepressants need to reach steady state before dose adjustments
are evaluated .
Q2. A 70-year-old patient with chronic kidney disease (eGFR 30 mL/min) is
prescribed a drug primarily renally excreted unchanged. Compared to a patient
with normal renal function, this patient will likely require:
A. A higher dose and more frequent administration
B. A lower dose and/or less frequent administration
C. The same dose with increased fluid intake
D. No dose adjustment because age does not affect renal excretion
Correct Answer: B. A lower dose and/or less frequent administration
Rationale: Renal impairment reduces drug clearance, leading to accumulation and
toxicity risk. The standard approach is to reduce the dose, extend the dosing interval,
or both—depending on the drug's therapeutic index and severity of impairment .
,Q3. The therapeutic index of a drug is defined as:
A. The ratio of the minimum effective dose to the maximum tolerated dose
B. The ratio of the toxic dose to the effective dose for 50% of the population
C. The difference between peak and trough drug concentrations
D. The ratio of the drug's half-life to its dosing interval
Correct Answer: B. The ratio of the toxic dose to the effective dose for 50% of
the population
Rationale: The therapeutic index (TI) is TD50/ED50. A wide TI (e.g., penicillin)
indicates relative safety; a narrow TI (e.g., digoxin, lithium, warfarin) requires close
monitoring because the toxic dose is close to the therapeutic dose .
Q4. A drug that binds to a receptor and produces a biological response is best
described as a:
A. Antagonist
B. Inverse agonist
C. Agonist
D. Allosteric modulator
Correct Answer: C. Agonist
Rationale: An agonist binds to a receptor and activates it, producing a response
(e.g., albuterol binding to beta-2 receptors causing bronchodilation). An antagonist
blocks receptor activity without producing a response .
Q5. A 65-year-old male with cirrhosis is prescribed a medication that undergoes
extensive first-pass hepatic metabolism. The NP understands that the
bioavailability of this medication will be affected by which alteration?
A. Decreased absorption from the GI tract
B. Reduced first-pass metabolism leading to increased bioavailability
C. Enhanced renal elimination compensating for hepatic impairment
D. Increased protein binding reducing free drug concentration
Correct Answer: B. Reduced first-pass metabolism leading to increased
bioavailability
Rationale: In cirrhosis, first-pass hepatic metabolism is reduced due to damaged
hepatocytes and portosystemic shunting, increasing bioavailability. This requires
dose reduction to avoid toxicity .
Q6. A patient receiving intravenous gentamicin has toxic serum drug levels
despite correct dosing and previous tolerance. What is a probable cause?
A. A loading dose was not given
B. The drug was not completely dissolved in the IV solution
,C. The patient is taking another medication that binds to serum albumin
D. The medication is being given at a frequency longer than its half-life
Correct Answer: C. The patient is taking another medication that binds to serum
albumin
Rationale: Drugs that compete for plasma albumin binding sites can displace
gentamicin, increasing free drug levels and causing toxicity despite correct dosing .
Q7. The nurse administers multiple medications, two of which compete for
plasma albumin receptor sites. What should the nurse anticipate? (Select all
that apply)
A. Binding of one or both agents will be reduced
B. Plasma levels of free drug will rise
C. Plasma levels of free drug will fall
D. The increase in free drug will intensify effects
E. The increase in bound drug will intensify effects
Correct Answer: A, B, D
Rationale: When drugs compete for albumin binding, protein binding is reduced,
free drug levels rise, and effects intensify. Only free (unbound) drug is
pharmacologically active .
Q8. A patient reports becoming "immune" to a medication because it no longer
works. The NP recognizes this decreased effectiveness is likely caused by:
A. Antagonists produced by the body that compete with the drug for receptor sites
B. Decreased selectivity of receptor sites
C. Desensitization of receptor sites by continual exposure to the drug
D. Synthesis of more receptor sites in response to the medication
Correct Answer: C. Desensitization of receptor sites by continual exposure to
the drug
Rationale: Receptor desensitization occurs with prolonged drug exposure, reducing
responsiveness. This is a common mechanism of drug tolerance .
Q9. A patient taking morphine for pain asks how a pain medication can also
cause constipation. What does the nurse know about morphine?
A. It binds to different types of receptors in the body
B. It can cause constipation in toxic doses
C. It causes only one type of response, and constipation is coincidental
D. It is selective to receptors that regulate more than one body process
Correct Answer: D. It is selective to receptors that regulate more than one body
process
, Rationale: Morphine binds to opioid receptors that regulate multiple processes
including pain perception and GI motility. Drugs can affect different systems through
the same receptor type .
Q10. When administering medications to infants, which considerations are
important? (Select all that apply)
A. Breast-feeding infants are more likely to develop toxicity with lipid-soluble drugs
B. Immaturity of renal function causes infants to excrete drugs less efficiently
C. Infants have immature livers, which slows drug metabolism
D. Infants are more sensitive to CNS-acting medications
E. Oral medications are contraindicated in infants
Correct Answer: B, C, D
Rationale: Infants have immature liver and kidney function, slowing metabolism and
excretion. They are also more sensitive to CNS-acting medications. Lipid-soluble drug
transfer to breast milk is more related to maternal drug levels than infant toxicity risk
from breastfeeding .
Q11. A 42-year-old female on warfarin 5 mg daily for atrial fibrillation is newly
prescribed amiodarone for rate control. The NP recognizes this interaction is
mediated through which mechanism?
A. Amiodarone increases warfarin metabolism via CYP450 induction
B. Amiodarone inhibits warfarin metabolism via CYP2C9 inhibition
C. Amiodarone displaces warfarin from plasma protein binding sites
D. Amiodarone reduces warfarin absorption from the GI tract
Correct Answer: B. Amiodarone inhibits warfarin metabolism via CYP2C9
inhibition
Rationale: Amiodarone is a potent CYP2C9 inhibitor that reduces warfarin
metabolism, leading to increased INR and bleeding risk. The warfarin dose typically
needs to be reduced by 30–50% .
Q12. Which of the following are common side effects of ACE inhibitors?
A. Hyperkalemia
B. Dry cough
C. Hypotension
D. Bradycardia
Correct Answer: A, B, C
Rationale: ACE inhibitors block angiotensin I to II conversion, reducing
vasoconstriction (causing hypotension), increasing potassium levels (hyperkalemia),
