NURS 676 ADVANCED PHARMACOLOGY FINAL EXAM
REVIEW 2026/2027 | Questions & Correct Answers | Graded
A+ | Pass Guaranteed - A+ Graded
Section 1: Pharmacokinetics & Pharmacodynamics Core Principles (Q1-18)
Q1. A 58-year-old patient with liver cirrhosis is prescribed a highly protein-bound drug
(95% bound to albumin). The patient's albumin level is 2.1 g/dL (normal 3.5-5.0 g/dL).
The nurse practitioner should anticipate:
A. Decreased free drug concentration and reduced pharmacological effect
B. Increased free drug concentration and increased risk of toxicity [CORRECT]
C. No change in drug distribution because protein binding is clinically insignificant
D. Decreased volume of distribution and need for increased dosing
Rationale: Hypoalbuminemia reduces protein binding, increasing the free (unbound)
fraction of highly protein-bound drugs and raising the risk of toxicity. Option A reverses
the expected effect, C ignores the clinical significance of protein binding, and D
incorrectly suggests increased dosing.
Correct Answer: B
Q2. A new oral drug has an AUC after oral administration of 48 mg·hr/L and an AUC
after IV administration of 60 mg·hr/L. What is the absolute bioavailability of this oral
formulation?
A. 60%
B. 80% [CORRECT]
C. 100%
D. 125%
Rationale: Absolute bioavailability (F) = AUCoral / AUCiv × 100 = 48/60 × 100 = 80%.
Option A reverses the calculation, C ignores the first-pass effect, and D exceeds 100%
which is impossible.
Correct Answer: B
Q3. A lipophilic drug with a large volume of distribution (Vd > 5 L/kg) is administered to
a patient in hemorrhagic shock. The nurse practitioner should expect:
,A. Rapid onset of action due to extensive tissue distribution
B. Delayed onset and prolonged duration due to sequestration in adipose tissue and
reduced perfusion [CORRECT]
C. Immediate renal elimination due to high water solubility
D. Reduced half-life because of increased hepatic blood flow
Rationale: Lipophilic drugs with large Vd distribute extensively into tissues; in shock,
reduced tissue perfusion delays distribution and onset of action. They are not
water-soluble, and hepatic blood flow is decreased, not increased, in shock.
Correct Answer: B
Q4. A patient receives a loading dose of phenytoin to achieve therapeutic levels rapidly.
The rationale for using a loading dose is based on which pharmacokinetic principle?
A. The drug has a long half-life and would take days to reach steady state without a
loading dose [CORRECT]
B. The drug is primarily excreted unchanged by the kidneys
C. The drug has high hepatic extraction and requires saturation of metabolism
D. The drug is a prodrug requiring activation
Rationale: Loading doses are used when drugs have long half-lives to achieve
therapeutic concentrations rapidly without waiting for steady state accumulation.
Phenytoin has a long, variable half-life (12-36 hours). Options B, C, and D do not
specifically justify loading dose strategy.
Correct Answer: A
Q5. A 70-year-old patient requires a drug that must cross the blood-brain barrier to treat
meningitis. Which molecular characteristic best predicts adequate CNS penetration?
A. Large molecular weight >1000 Da and highly protein bound
B. Small molecular weight, high lipophilicity, and low protein binding [CORRECT]
C. Highly ionized at physiological pH and water soluble
D. Large molecular weight and actively secreted by P-glycoprotein
Rationale: Small, lipophilic, un-ionized drugs with low protein binding cross the
blood-brain barrier most effectively. Large, hydrophilic, ionized, or P-glycoprotein
substrate drugs have poor CNS penetration.
Correct Answer: B
,Q6. A patient taking carbamazepine for epilepsy requires an oral antifungal for
candidiasis. The nurse practitioner avoids itraconazole and selects fluconazole
cautiously because:
A. Carbamazepine is a CYP450 inhibitor that increases azole toxicity
B. Carbamazepine is a potent CYP450 inducer that reduces azole efficacy and may
require dose adjustment [CORRECT]
C. Fluconazole inhibits carbamazepine absorption in the stomach
D. Azoles increase carbamazepine renal clearance
Rationale: Carbamazepine induces CYP3A4, increasing metabolism of CYP substrates
including azole antifungals and reducing their efficacy. Fluconazole is a less potent
inhibitor than itraconazole/voriconazole but still requires caution. Carbamazepine does
not inhibit CYP, reduce absorption, or increase renal clearance of azoles.
Correct Answer: B
Q7. A patient with slow acetylator phenotype receives isoniazid. The nurse practitioner
should monitor for:
A. Rapid drug elimination requiring higher doses
B. Increased risk of peripheral neuropathy and hepatotoxicity due to accumulation
[CORRECT]
C. Decreased efficacy against Mycobacterium tuberculosis
D. Enhanced Phase I metabolism of the drug
Rationale: Slow acetylators have reduced Phase II (N-acetyltransferase) conjugation,
causing isoniazid accumulation and increased toxicity (peripheral neuropathy,
hepatitis). Fast acetylators require higher doses, and acetylation is Phase II, not Phase I.
Correct Answer: B
Q8. A patient on simvastatin 40 mg daily is prescribed clarithromycin for
community-acquired pneumonia. The nurse practitioner should:
A. Continue simvastatin at the current dose
B. Reduce simvastatin to 10 mg daily
C. Hold simvastatin during antibiotic therapy due to CYP3A4 inhibition and
rhabdomyolysis risk [CORRECT]
D. Switch simvastatin to pravastatin without dose change
Rationale: Clarithromycin is a potent CYP3A4 inhibitor that significantly increases
simvastatin levels and the risk of rhabdomyolysis. Simvastatin should be held during
, therapy. Pravastatin is not metabolized by CYP3A4, but the question asks about the
current simvastatin regimen.
Correct Answer: C
Q9. A 24-year-old patient taking oral contraceptives is started on rifampin for latent TB.
The nurse practitioner counsels the patient that:
A. Rifampin increases estrogen levels and raises thrombosis risk
B. Rifampin induces CYP450 enzymes, accelerating estrogen metabolism and reducing
contraceptive efficacy; backup contraception is required [CORRECT]
C. Rifampin inhibits progesterone absorption and causes breakthrough bleeding only
D. No interaction exists between antibiotics and hormonal contraceptives
Rationale: Rifampin is a potent CYP3A4 inducer that increases metabolism of ethinyl
estradiol and progestins, reducing contraceptive efficacy and requiring backup
methods. Most antibiotics do not affect contraceptives, but rifampin is a major
exception.
Correct Answer: B
Q10. A drug has a half-life of 6 hours. Approximately how long will it take to reach
steady-state concentration with repeated dosing?
A. 6 hours
B. 12 hours
C. 24 hours
D. 30 hours [CORRECT]
Rationale: Steady state is reached after approximately 5 half-lives (5 × 6 = 30 hours).
Option A is one half-life (50% accumulation), B is two half-lives (75%), and C is four
half-lives (94%).
Correct Answer: D
Q11. A 65-year-old male patient weighs 72 kg and has a serum creatinine of 1.6 mg/dL.
Using the Cockcroft-Gault equation, his creatinine clearance is approximately:
A. 35 mL/min
B. 48 mL/min [CORRECT]
C. 62 mL/min
D. 78 mL/min
REVIEW 2026/2027 | Questions & Correct Answers | Graded
A+ | Pass Guaranteed - A+ Graded
Section 1: Pharmacokinetics & Pharmacodynamics Core Principles (Q1-18)
Q1. A 58-year-old patient with liver cirrhosis is prescribed a highly protein-bound drug
(95% bound to albumin). The patient's albumin level is 2.1 g/dL (normal 3.5-5.0 g/dL).
The nurse practitioner should anticipate:
A. Decreased free drug concentration and reduced pharmacological effect
B. Increased free drug concentration and increased risk of toxicity [CORRECT]
C. No change in drug distribution because protein binding is clinically insignificant
D. Decreased volume of distribution and need for increased dosing
Rationale: Hypoalbuminemia reduces protein binding, increasing the free (unbound)
fraction of highly protein-bound drugs and raising the risk of toxicity. Option A reverses
the expected effect, C ignores the clinical significance of protein binding, and D
incorrectly suggests increased dosing.
Correct Answer: B
Q2. A new oral drug has an AUC after oral administration of 48 mg·hr/L and an AUC
after IV administration of 60 mg·hr/L. What is the absolute bioavailability of this oral
formulation?
A. 60%
B. 80% [CORRECT]
C. 100%
D. 125%
Rationale: Absolute bioavailability (F) = AUCoral / AUCiv × 100 = 48/60 × 100 = 80%.
Option A reverses the calculation, C ignores the first-pass effect, and D exceeds 100%
which is impossible.
Correct Answer: B
Q3. A lipophilic drug with a large volume of distribution (Vd > 5 L/kg) is administered to
a patient in hemorrhagic shock. The nurse practitioner should expect:
,A. Rapid onset of action due to extensive tissue distribution
B. Delayed onset and prolonged duration due to sequestration in adipose tissue and
reduced perfusion [CORRECT]
C. Immediate renal elimination due to high water solubility
D. Reduced half-life because of increased hepatic blood flow
Rationale: Lipophilic drugs with large Vd distribute extensively into tissues; in shock,
reduced tissue perfusion delays distribution and onset of action. They are not
water-soluble, and hepatic blood flow is decreased, not increased, in shock.
Correct Answer: B
Q4. A patient receives a loading dose of phenytoin to achieve therapeutic levels rapidly.
The rationale for using a loading dose is based on which pharmacokinetic principle?
A. The drug has a long half-life and would take days to reach steady state without a
loading dose [CORRECT]
B. The drug is primarily excreted unchanged by the kidneys
C. The drug has high hepatic extraction and requires saturation of metabolism
D. The drug is a prodrug requiring activation
Rationale: Loading doses are used when drugs have long half-lives to achieve
therapeutic concentrations rapidly without waiting for steady state accumulation.
Phenytoin has a long, variable half-life (12-36 hours). Options B, C, and D do not
specifically justify loading dose strategy.
Correct Answer: A
Q5. A 70-year-old patient requires a drug that must cross the blood-brain barrier to treat
meningitis. Which molecular characteristic best predicts adequate CNS penetration?
A. Large molecular weight >1000 Da and highly protein bound
B. Small molecular weight, high lipophilicity, and low protein binding [CORRECT]
C. Highly ionized at physiological pH and water soluble
D. Large molecular weight and actively secreted by P-glycoprotein
Rationale: Small, lipophilic, un-ionized drugs with low protein binding cross the
blood-brain barrier most effectively. Large, hydrophilic, ionized, or P-glycoprotein
substrate drugs have poor CNS penetration.
Correct Answer: B
,Q6. A patient taking carbamazepine for epilepsy requires an oral antifungal for
candidiasis. The nurse practitioner avoids itraconazole and selects fluconazole
cautiously because:
A. Carbamazepine is a CYP450 inhibitor that increases azole toxicity
B. Carbamazepine is a potent CYP450 inducer that reduces azole efficacy and may
require dose adjustment [CORRECT]
C. Fluconazole inhibits carbamazepine absorption in the stomach
D. Azoles increase carbamazepine renal clearance
Rationale: Carbamazepine induces CYP3A4, increasing metabolism of CYP substrates
including azole antifungals and reducing their efficacy. Fluconazole is a less potent
inhibitor than itraconazole/voriconazole but still requires caution. Carbamazepine does
not inhibit CYP, reduce absorption, or increase renal clearance of azoles.
Correct Answer: B
Q7. A patient with slow acetylator phenotype receives isoniazid. The nurse practitioner
should monitor for:
A. Rapid drug elimination requiring higher doses
B. Increased risk of peripheral neuropathy and hepatotoxicity due to accumulation
[CORRECT]
C. Decreased efficacy against Mycobacterium tuberculosis
D. Enhanced Phase I metabolism of the drug
Rationale: Slow acetylators have reduced Phase II (N-acetyltransferase) conjugation,
causing isoniazid accumulation and increased toxicity (peripheral neuropathy,
hepatitis). Fast acetylators require higher doses, and acetylation is Phase II, not Phase I.
Correct Answer: B
Q8. A patient on simvastatin 40 mg daily is prescribed clarithromycin for
community-acquired pneumonia. The nurse practitioner should:
A. Continue simvastatin at the current dose
B. Reduce simvastatin to 10 mg daily
C. Hold simvastatin during antibiotic therapy due to CYP3A4 inhibition and
rhabdomyolysis risk [CORRECT]
D. Switch simvastatin to pravastatin without dose change
Rationale: Clarithromycin is a potent CYP3A4 inhibitor that significantly increases
simvastatin levels and the risk of rhabdomyolysis. Simvastatin should be held during
, therapy. Pravastatin is not metabolized by CYP3A4, but the question asks about the
current simvastatin regimen.
Correct Answer: C
Q9. A 24-year-old patient taking oral contraceptives is started on rifampin for latent TB.
The nurse practitioner counsels the patient that:
A. Rifampin increases estrogen levels and raises thrombosis risk
B. Rifampin induces CYP450 enzymes, accelerating estrogen metabolism and reducing
contraceptive efficacy; backup contraception is required [CORRECT]
C. Rifampin inhibits progesterone absorption and causes breakthrough bleeding only
D. No interaction exists between antibiotics and hormonal contraceptives
Rationale: Rifampin is a potent CYP3A4 inducer that increases metabolism of ethinyl
estradiol and progestins, reducing contraceptive efficacy and requiring backup
methods. Most antibiotics do not affect contraceptives, but rifampin is a major
exception.
Correct Answer: B
Q10. A drug has a half-life of 6 hours. Approximately how long will it take to reach
steady-state concentration with repeated dosing?
A. 6 hours
B. 12 hours
C. 24 hours
D. 30 hours [CORRECT]
Rationale: Steady state is reached after approximately 5 half-lives (5 × 6 = 30 hours).
Option A is one half-life (50% accumulation), B is two half-lives (75%), and C is four
half-lives (94%).
Correct Answer: D
Q11. A 65-year-old male patient weighs 72 kg and has a serum creatinine of 1.6 mg/dL.
Using the Cockcroft-Gault equation, his creatinine clearance is approximately:
A. 35 mL/min
B. 48 mL/min [CORRECT]
C. 62 mL/min
D. 78 mL/min
