NURS 617 Pharmacology —
Comprehensive Final Exam with
verified answers and rationale
updated 2026 graded A+ new!!
SECTION 1: PHARMACOKINETICS (Questions 1–15)
1. A patient with severe hepatic cirrhosis and low serum albumin is prescribed a
highly protein-bound acidic medication. Which statement correctly describes
the expected effect on serum drug levels?
A. Reduced free drug levels due to increased binding sites
B. Difficult-to-predict free drug levels with increased risk of toxicity
C. Enhanced drug metabolism due to hepatic enzyme induction
D. Decreased volume of distribution for the medication
Answer: B. Difficult-to-predict free drug levels with increased risk of toxicity
Rationale: Serum albumin is the primary binding protein for acidic drugs. In cirrhosis
with hypoalbuminemia, fewer binding sites are available, resulting in a higher fraction
of free, pharmacologically active drug. This increases the risk of toxicity and makes
serum levels difficult to predict. -3-12
2. Which of the following best defines the first-pass effect?
A. Rapid renal excretion of a drug upon first circulation
B. Binding of a drug to plasma proteins during initial transport
C. Hepatic metabolism of an oral drug before it reaches systemic circulation
D. Redistribution of a lipid-soluble drug from the brain to adipose tissue
Answer: C. Hepatic metabolism of an oral drug before it reaches systemic
circulation
Rationale: The first-pass effect occurs when orally administered drugs are absorbed
from the GI tract and transported via the portal vein to the liver, where a significant
,portion is metabolized before entering systemic circulation. This is why oral doses are
often higher than IV doses. -3-11
3. A patient is prescribed a drug with a narrow therapeutic index. Which
monitoring strategy is most appropriate?
A. Monitor for symptomatic relief only
B. Perform regular serum drug level monitoring
C. Increase the dose every two weeks until side effects appear
D. Use the drug only in hospitalized patients with continuous EKG
Answer: B. Perform regular serum drug level monitoring
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, lithium, warfarin,
phenytoin) have a small margin between effective and toxic doses. Therapeutic drug
monitoring is essential to maintain levels within the safe range. -3-12
4. A drug has a half-life of 12 hours. Approximately how long will it take to
reach steady state?
A. 12 hours
B. 24 hours
C. 60 hours
D. 72 hours
Answer: C. 60 hours
Rationale: Steady state is achieved after approximately 4–5 half-lives. For a drug with
a 12-hour half-life: 12 × 5 = 60 hours. -11
5. Which statement regarding absorption and route of administration is TRUE?
A. Any drug administered directly into the bloodstream must cross a lipid cell
membrane to be absorbed
B. Application of drugs to the skin leads to consistent serum drug concentrations
,C. With IV and intra-arterial routes, the exact amount of drug absorbed is known
D. Absorption of oral medications is not affected by food
Answer: C. With IV and intra-arterial routes, the exact amount of drug absorbed
is known
Rationale: IV and intra-arterial administration bypass absorption barriers, delivering
100% of the dose directly into systemic circulation with known bioavailability. -8
6. A prodrug administered to a patient with severe hepatic cirrhosis may have:
A. Faster than normal onset of action
B. Slower or absent onset of action due to impaired metabolic activation
C. No effect on drug activation
D. Immediate toxicity
Answer: B. Slower or absent onset of action due to impaired metabolic
activation
Rationale: Prodrugs are inactive compounds requiring hepatic metabolism for
conversion to active drugs (e.g., enalapril → enalaprilat, codeine → morphine). In
cirrhosis, this conversion is impaired. -12
7. Enterohepatic recirculation refers to:
A. First-pass effect in the liver
B. Cycling of drugs from liver → bile → intestine → back to liver
C. Absorption of drugs from the stomach
D. Excretion of drugs through the lungs
Answer: B. Cycling of drugs from liver → bile → intestine → back to liver
Rationale: Enterohepatic recirculation prolongs drug half-life by allowing
reabsorption of drugs excreted in bile. -12
, 8. The time from drug administration until the drug reaches minimum effective
concentration is called:
A. Peak time
B. Onset of action
C. Duration of action
D. Half-life
Answer: B. Onset of action
Rationale: Onset of action is the time required for a drug to reach the minimum
effective concentration (MEC) necessary to produce a therapeutic effect. -12
9. Which CYP450 enzyme is responsible for metabolism of approximately 50%
of drugs and is induced by rifampin?
A. CYP2D6
B. CYP2C19
C. CYP3A4
D. CYP1A2
Answer: C. CYP3A4
Rationale: CYP3A4 metabolizes approximately 50% of all drugs. Rifampin is a potent
inducer of CYP3A4, which can reduce efficacy of drugs metabolized by this
enzyme. -11
10. A patient taking Drug A is prescribed Drug B, which displaces Drug A from
plasma albumin. What is the expected effect?
A. Decreased effect of Drug A
B. Increased free fraction of Drug A with potential toxicity
C. No change in Drug A activity
D. Decreased volume of distribution for Drug A
Answer: B. Increased free fraction of Drug A with potential toxicity
Rationale: Displacement from protein binding increases the free (active) fraction of
the displaced drug, potentially causing toxicity. -11
Comprehensive Final Exam with
verified answers and rationale
updated 2026 graded A+ new!!
SECTION 1: PHARMACOKINETICS (Questions 1–15)
1. A patient with severe hepatic cirrhosis and low serum albumin is prescribed a
highly protein-bound acidic medication. Which statement correctly describes
the expected effect on serum drug levels?
A. Reduced free drug levels due to increased binding sites
B. Difficult-to-predict free drug levels with increased risk of toxicity
C. Enhanced drug metabolism due to hepatic enzyme induction
D. Decreased volume of distribution for the medication
Answer: B. Difficult-to-predict free drug levels with increased risk of toxicity
Rationale: Serum albumin is the primary binding protein for acidic drugs. In cirrhosis
with hypoalbuminemia, fewer binding sites are available, resulting in a higher fraction
of free, pharmacologically active drug. This increases the risk of toxicity and makes
serum levels difficult to predict. -3-12
2. Which of the following best defines the first-pass effect?
A. Rapid renal excretion of a drug upon first circulation
B. Binding of a drug to plasma proteins during initial transport
C. Hepatic metabolism of an oral drug before it reaches systemic circulation
D. Redistribution of a lipid-soluble drug from the brain to adipose tissue
Answer: C. Hepatic metabolism of an oral drug before it reaches systemic
circulation
Rationale: The first-pass effect occurs when orally administered drugs are absorbed
from the GI tract and transported via the portal vein to the liver, where a significant
,portion is metabolized before entering systemic circulation. This is why oral doses are
often higher than IV doses. -3-11
3. A patient is prescribed a drug with a narrow therapeutic index. Which
monitoring strategy is most appropriate?
A. Monitor for symptomatic relief only
B. Perform regular serum drug level monitoring
C. Increase the dose every two weeks until side effects appear
D. Use the drug only in hospitalized patients with continuous EKG
Answer: B. Perform regular serum drug level monitoring
Rationale: Drugs with a narrow therapeutic index (e.g., digoxin, lithium, warfarin,
phenytoin) have a small margin between effective and toxic doses. Therapeutic drug
monitoring is essential to maintain levels within the safe range. -3-12
4. A drug has a half-life of 12 hours. Approximately how long will it take to
reach steady state?
A. 12 hours
B. 24 hours
C. 60 hours
D. 72 hours
Answer: C. 60 hours
Rationale: Steady state is achieved after approximately 4–5 half-lives. For a drug with
a 12-hour half-life: 12 × 5 = 60 hours. -11
5. Which statement regarding absorption and route of administration is TRUE?
A. Any drug administered directly into the bloodstream must cross a lipid cell
membrane to be absorbed
B. Application of drugs to the skin leads to consistent serum drug concentrations
,C. With IV and intra-arterial routes, the exact amount of drug absorbed is known
D. Absorption of oral medications is not affected by food
Answer: C. With IV and intra-arterial routes, the exact amount of drug absorbed
is known
Rationale: IV and intra-arterial administration bypass absorption barriers, delivering
100% of the dose directly into systemic circulation with known bioavailability. -8
6. A prodrug administered to a patient with severe hepatic cirrhosis may have:
A. Faster than normal onset of action
B. Slower or absent onset of action due to impaired metabolic activation
C. No effect on drug activation
D. Immediate toxicity
Answer: B. Slower or absent onset of action due to impaired metabolic
activation
Rationale: Prodrugs are inactive compounds requiring hepatic metabolism for
conversion to active drugs (e.g., enalapril → enalaprilat, codeine → morphine). In
cirrhosis, this conversion is impaired. -12
7. Enterohepatic recirculation refers to:
A. First-pass effect in the liver
B. Cycling of drugs from liver → bile → intestine → back to liver
C. Absorption of drugs from the stomach
D. Excretion of drugs through the lungs
Answer: B. Cycling of drugs from liver → bile → intestine → back to liver
Rationale: Enterohepatic recirculation prolongs drug half-life by allowing
reabsorption of drugs excreted in bile. -12
, 8. The time from drug administration until the drug reaches minimum effective
concentration is called:
A. Peak time
B. Onset of action
C. Duration of action
D. Half-life
Answer: B. Onset of action
Rationale: Onset of action is the time required for a drug to reach the minimum
effective concentration (MEC) necessary to produce a therapeutic effect. -12
9. Which CYP450 enzyme is responsible for metabolism of approximately 50%
of drugs and is induced by rifampin?
A. CYP2D6
B. CYP2C19
C. CYP3A4
D. CYP1A2
Answer: C. CYP3A4
Rationale: CYP3A4 metabolizes approximately 50% of all drugs. Rifampin is a potent
inducer of CYP3A4, which can reduce efficacy of drugs metabolized by this
enzyme. -11
10. A patient taking Drug A is prescribed Drug B, which displaces Drug A from
plasma albumin. What is the expected effect?
A. Decreased effect of Drug A
B. Increased free fraction of Drug A with potential toxicity
C. No change in Drug A activity
D. Decreased volume of distribution for Drug A
Answer: B. Increased free fraction of Drug A with potential toxicity
Rationale: Displacement from protein binding increases the free (active) fraction of
the displaced drug, potentially causing toxicity. -11
