NUR 2474 Pharmacology for Professional Nursing
Exam 2 NGN-Aligned Rasmussen University
Actual Exam 2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass Guaranteed
– A+ Graded
SECTION 1: PHARMACOKINETICS &
PHARMACODYNAMICS (Questions 1–10)
Q1: A 68-year-old patient with chronic heart failure is prescribed oral furosemide 40 mg daily. The
nurse notes the patient has moderate peripheral edema and a serum albumin of 2.8 g/dL (normal
3.5–5.0). Which pharmacokinetic principle best explains the nurse's concern about drug
effectiveness?
A. Decreased absorption due to delayed gastric emptying in heart failure
B. Reduced distribution because of low protein binding capacity increasing free drug
C. Altered metabolism through CYP450 inhibition by loop diuretics
D. Increased excretion due to enhanced renal blood flow from edema
Correct Answer: B
,Rationale: Correct because NUR 2474 emphasizes that albumin is the primary plasma protein for
drug binding. When albumin is low, less drug binds to protein, increasing the free (unbound)
fraction. For furosemide, which is highly protein-bound, this increases the pharmacologically active
drug available but also increases risk of toxicity. Safe medication administration requires monitoring
for enhanced diuretic effect and potential hypotension in hypoalbuminemic patients.
Q2: A patient receiving IV morphine via patient-controlled analgesia (PCA) asks why the nurse
must wait exactly 6 minutes between doses. The nurse explains this is based on which
pharmacokinetic parameter?
A. Onset of action determining when therapeutic effect begins
B. Half-life ensuring drug accumulation does not exceed safe levels
C. Volume of distribution calculating total body water compartments
D. Bioavailability comparing oral versus parenteral routes
Correct Answer: B
Rationale: Correct because NUR 2474 emphasizes that half-life (t½) is the time required for plasma
drug concentration to decrease by 50%. Morphine's half-life of approximately 2–4 hours
determines dosing intervals to prevent accumulation and respiratory depression. The lockout
interval in PCA is designed to allow partial elimination between doses, maintaining plasma levels
within the therapeutic window while preventing overdose.
Q3: A patient on phenytoin for seizure control has subtherapeutic drug levels despite good
adherence. The nurse learns the patient started taking St. John's wort for depression. Which
CYP450 interaction explains this finding?
A. St. John's wort is a CYP3A4 inhibitor, decreasing phenytoin metabolism
,B. St. John's wort is a CYP2C9 inducer, increasing phenytoin metabolism
C. St. John's wort is a CYP1A2 substrate, competing with phenytoin for binding
D. St. John's wort is a CYP2D6 inhibitor, reducing phenytoin clearance
Correct Answer: B
Rationale: Correct because NUR 2474 emphasizes that St. John's wort is a potent inducer of
multiple CYP450 enzymes including CYP2C9 and CYP3A4. Phenytoin is primarily metabolized by
CYP2C9. Enzyme induction increases the metabolic rate, decreasing phenytoin plasma
concentrations and potentially causing breakthrough seizures. Safe medication administration
requires obtaining a complete medication and herbal supplement history.
Q4: A patient with liver cirrhosis is prescribed lorazepam 1 mg PO for anxiety. The nurse recognizes
that which pharmacokinetic process is most significantly altered in this patient?
A. Absorption through impaired gastrointestinal motility
B. Distribution due to increased plasma protein binding
C. Metabolism via decreased hepatic blood flow and enzyme activity
D. Excretion through enhanced renal clearance
Correct Answer: C
Rationale: Correct because NUR 2474 emphasizes that lorazepam undergoes hepatic
glucuronidation, and liver cirrhosis significantly impairs both Phase I (oxidation) and Phase II
(conjugation) metabolism. Decreased hepatic blood flow and functional hepatocyte mass reduce
drug clearance, prolonging half-life and increasing risk of excessive sedation and respiratory
depression. Safe medication administration requires dose reduction and extended dosing intervals
in hepatic impairment.
, Q5: A nurse is teaching a patient about warfarin therapy. The patient asks why the medication
takes several days to reach full anticoagulant effect. The nurse's best response is based on
understanding of which pharmacodynamic principle?
A. Receptor upregulation requiring time for new receptor synthesis
B. Steady-state concentration and elimination of previously synthesized clotting factors
C. First-pass metabolism gradually saturating hepatic enzyme systems
D. Therapeutic index requiring titration to avoid toxicity
Correct Answer: B
Rationale: Correct because NUR 2474 emphasizes that warfarin inhibits vitamin K-dependent
synthesis of clotting factors II, VII, IX, and X. The delayed onset of action (2–5 days) reflects the
pharmacodynamic principle that existing clotting factors must be consumed through normal
physiologic turnover before anticoagulant effect is achieved. Steady-state for warfarin's
pharmacodynamic effect depends on factor half-lives, not drug half-life alone.
Q6: A patient receives naloxone 0.4 mg IV for suspected opioid overdose. Within 2 minutes, the
patient becomes responsive but 30 minutes later becomes obtunded again. Which pharmacokinetic
principle explains this clinical pattern?
A. Naloxone has a shorter half-life than most opioids, requiring repeat dosing
B. Naloxone undergoes extensive first-pass metabolism when given IV
C. The opioid has high volume of distribution, redistributing from tissues
D. Naloxone is a partial agonist with limited receptor occupancy duration
Correct Answer: A
Exam 2 NGN-Aligned Rasmussen University
Actual Exam 2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass Guaranteed
– A+ Graded
SECTION 1: PHARMACOKINETICS &
PHARMACODYNAMICS (Questions 1–10)
Q1: A 68-year-old patient with chronic heart failure is prescribed oral furosemide 40 mg daily. The
nurse notes the patient has moderate peripheral edema and a serum albumin of 2.8 g/dL (normal
3.5–5.0). Which pharmacokinetic principle best explains the nurse's concern about drug
effectiveness?
A. Decreased absorption due to delayed gastric emptying in heart failure
B. Reduced distribution because of low protein binding capacity increasing free drug
C. Altered metabolism through CYP450 inhibition by loop diuretics
D. Increased excretion due to enhanced renal blood flow from edema
Correct Answer: B
,Rationale: Correct because NUR 2474 emphasizes that albumin is the primary plasma protein for
drug binding. When albumin is low, less drug binds to protein, increasing the free (unbound)
fraction. For furosemide, which is highly protein-bound, this increases the pharmacologically active
drug available but also increases risk of toxicity. Safe medication administration requires monitoring
for enhanced diuretic effect and potential hypotension in hypoalbuminemic patients.
Q2: A patient receiving IV morphine via patient-controlled analgesia (PCA) asks why the nurse
must wait exactly 6 minutes between doses. The nurse explains this is based on which
pharmacokinetic parameter?
A. Onset of action determining when therapeutic effect begins
B. Half-life ensuring drug accumulation does not exceed safe levels
C. Volume of distribution calculating total body water compartments
D. Bioavailability comparing oral versus parenteral routes
Correct Answer: B
Rationale: Correct because NUR 2474 emphasizes that half-life (t½) is the time required for plasma
drug concentration to decrease by 50%. Morphine's half-life of approximately 2–4 hours
determines dosing intervals to prevent accumulation and respiratory depression. The lockout
interval in PCA is designed to allow partial elimination between doses, maintaining plasma levels
within the therapeutic window while preventing overdose.
Q3: A patient on phenytoin for seizure control has subtherapeutic drug levels despite good
adherence. The nurse learns the patient started taking St. John's wort for depression. Which
CYP450 interaction explains this finding?
A. St. John's wort is a CYP3A4 inhibitor, decreasing phenytoin metabolism
,B. St. John's wort is a CYP2C9 inducer, increasing phenytoin metabolism
C. St. John's wort is a CYP1A2 substrate, competing with phenytoin for binding
D. St. John's wort is a CYP2D6 inhibitor, reducing phenytoin clearance
Correct Answer: B
Rationale: Correct because NUR 2474 emphasizes that St. John's wort is a potent inducer of
multiple CYP450 enzymes including CYP2C9 and CYP3A4. Phenytoin is primarily metabolized by
CYP2C9. Enzyme induction increases the metabolic rate, decreasing phenytoin plasma
concentrations and potentially causing breakthrough seizures. Safe medication administration
requires obtaining a complete medication and herbal supplement history.
Q4: A patient with liver cirrhosis is prescribed lorazepam 1 mg PO for anxiety. The nurse recognizes
that which pharmacokinetic process is most significantly altered in this patient?
A. Absorption through impaired gastrointestinal motility
B. Distribution due to increased plasma protein binding
C. Metabolism via decreased hepatic blood flow and enzyme activity
D. Excretion through enhanced renal clearance
Correct Answer: C
Rationale: Correct because NUR 2474 emphasizes that lorazepam undergoes hepatic
glucuronidation, and liver cirrhosis significantly impairs both Phase I (oxidation) and Phase II
(conjugation) metabolism. Decreased hepatic blood flow and functional hepatocyte mass reduce
drug clearance, prolonging half-life and increasing risk of excessive sedation and respiratory
depression. Safe medication administration requires dose reduction and extended dosing intervals
in hepatic impairment.
, Q5: A nurse is teaching a patient about warfarin therapy. The patient asks why the medication
takes several days to reach full anticoagulant effect. The nurse's best response is based on
understanding of which pharmacodynamic principle?
A. Receptor upregulation requiring time for new receptor synthesis
B. Steady-state concentration and elimination of previously synthesized clotting factors
C. First-pass metabolism gradually saturating hepatic enzyme systems
D. Therapeutic index requiring titration to avoid toxicity
Correct Answer: B
Rationale: Correct because NUR 2474 emphasizes that warfarin inhibits vitamin K-dependent
synthesis of clotting factors II, VII, IX, and X. The delayed onset of action (2–5 days) reflects the
pharmacodynamic principle that existing clotting factors must be consumed through normal
physiologic turnover before anticoagulant effect is achieved. Steady-state for warfarin's
pharmacodynamic effect depends on factor half-lives, not drug half-life alone.
Q6: A patient receives naloxone 0.4 mg IV for suspected opioid overdose. Within 2 minutes, the
patient becomes responsive but 30 minutes later becomes obtunded again. Which pharmacokinetic
principle explains this clinical pattern?
A. Naloxone has a shorter half-life than most opioids, requiring repeat dosing
B. Naloxone undergoes extensive first-pass metabolism when given IV
C. The opioid has high volume of distribution, redistributing from tissues
D. Naloxone is a partial agonist with limited receptor occupancy duration
Correct Answer: A
