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NURS 5334 Advanced Pharmacology for Nurse Practitioners – Final
Exam Study Guide Complete Question Bank (Questions 1–200) with
Verified Answers and Detailed Rationales University of Texas at
Arlington (UTA) – 2025/2026 Update
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Q 1-30)
Question 1: Define pharmacokinetics.
☑ Correct Answer: The impact of the body on drugs — how much of an administered
dose reaches its sites of action.
Rationale: Pharmacokinetics encompasses Absorption, Distribution, Metabolism, and Excretion
(ADME). It answers "What does the body do to the drug?" Pharmacodynamics, in contrast, is
the impact of drugs on the body.
Question 2: What are the four major pharmacokinetic processes?
☑ Correct Answer: Absorption, Distribution, Metabolism, and Excretion (ADME).
Rationale: These four processes determine drug concentration at action sites over time, helping
predict onset, peak duration, and elimination.
Question 3: Define pharmacodynamics.
☑ Correct Answer: The impact of drugs on the body — the nature and intensity of the
response.
Rationale: Pharmacodynamics includes receptor binding, post-receptor effects, and clinical
response. It answers "What does the drug do to the body?"
Question 4: A drug reaches steady-state concentration in approximately how many half-lives?
☑ Correct Answer: Five half-lives.
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Rationale: Steady state is achieved when the rate of drug administration equals the rate of
elimination. Approximately 94% of steady state is reached after four half-lives, and over 97%
after five half-lives.
Question 5: A patient is prescribed a drug with a half-life of 8 hours. How long will it take to
reach steady-state concentration with regular dosing?
☑ Correct Answer: 40 hours.
Rationale: 8 hours × 5 half-lives = 40 hours to reach approximately 97% of steady-state
concentration.
Question 6: Define the term "half-life" (t½).
☑ Correct Answer: The time required for the amount of drug in the body to decrease by
50%.
Rationale: Half-life determines dosing interval, time to steady state, and time for drug
elimination from the body.
Question 7: Zero-order kinetics means:
A) A constant fraction of the drug is eliminated per hour
B) A constant amount of the drug is eliminated per unit time
C) Half-life remains constant
D) First-pass effect is absent
☑ Correct Answer: B) A constant amount of the drug is eliminated per unit time.
Rationale: Zero-order kinetics eliminates a fixed amount per hour regardless of concentration.
Half-life increases with dose. Examples: phenytoin (therapeutic doses), high-dose alcohol, high-
dose aspirin.
Question 8: A drug with a narrow therapeutic index requires:
A) No monitoring
B) Therapeutic drug monitoring (TDM)
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C) Administration with a high-fat meal
D) Twice-daily dosing
☑ Correct Answer: B) Therapeutic drug monitoring (TDM).
Rationale: Narrow therapeutic index drugs (e.g., warfarin, phenytoin, digoxin, lithium) have a
small margin between therapeutic and toxic doses. Serum concentration monitoring is essential
to maintain efficacy and avoid toxicity.
Question 9: What is a "free drug"?
A) The drug not bound to protein, free to exert therapeutic effect
B) The drug that is completely metabolized
C) The drug that is excreted unchanged
D) The drug that is bound to albumin
☑ Correct Answer: A) The drug not bound to protein, free to exert therapeutic effect.
Rationale: Only unbound (free) drug can cross cell membranes and bind to receptors to
produce a pharmacologic effect. Protein-bound drug serves as a reservoir but is inactive.
Conditions affecting protein binding (malnutrition, liver disease) can alter drug effects.
Question 10: A patient is prescribed a drug that is 95% protein-bound. Which statement best
describes the clinical significance of this property?
A) The drug will have a rapid onset of action.
B) The drug will be extensively metabolized by the liver.
C) Another highly protein-bound drug may displace it, increasing free drug levels and risk of
toxicity.
D) The drug will be eliminated unchanged by the kidneys.
☑ Correct Answer: C) Another highly protein-bound drug may displace it, increasing free
drug levels and risk of toxicity.
, 4
Rationale: Highly protein-bound drugs (e.g., warfarin, phenytoin) have a small free fraction. If a
second highly bound drug is added, competition for binding sites can displace the first drug,
increasing free (active) levels and potentially causing toxicity.
Question 11: The CYP450 enzyme system is responsible for:
A) Drug excretion in the urine
B) Phase I drug metabolism
C) Drug absorption from the GI tract
D) Drug distribution to tissues
☑ Correct Answer: B) Phase I drug metabolism.
Rationale: CYP450 enzymes (primarily in liver) perform Phase I metabolism (oxidation,
reduction, hydrolysis). Important isoenzymes: 3A4 (50% of drugs), 2D6, 2C9, 2C19, 1A2.
Question 12: How does grapefruit juice affect CYP450 metabolism?
A) CYP450 inducer – increases metabolism
B) CYP450 inhibitor – decreases metabolism, potential toxicity
C) No effect on metabolism
D) Only affects absorption
☑ Correct Answer: B) CYP450 inhibitor – decreases metabolism, potential toxicity.
Rationale: Grapefruit juice inhibits CYP3A4, the enzyme responsible for metabolizing many
drugs (statins, calcium channel blockers). This inhibition increases drug levels, potentially
causing toxicity.
Question 13: The first-pass effect refers to:
A) Rapid distribution of drug to tissues
B) Metabolism of a drug before it reaches systemic circulation
C) Binding of drug to plasma proteins
D) Excretion of drug in urine
NURS 5334 Advanced Pharmacology for Nurse Practitioners – Final
Exam Study Guide Complete Question Bank (Questions 1–200) with
Verified Answers and Detailed Rationales University of Texas at
Arlington (UTA) – 2025/2026 Update
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS (Q 1-30)
Question 1: Define pharmacokinetics.
☑ Correct Answer: The impact of the body on drugs — how much of an administered
dose reaches its sites of action.
Rationale: Pharmacokinetics encompasses Absorption, Distribution, Metabolism, and Excretion
(ADME). It answers "What does the body do to the drug?" Pharmacodynamics, in contrast, is
the impact of drugs on the body.
Question 2: What are the four major pharmacokinetic processes?
☑ Correct Answer: Absorption, Distribution, Metabolism, and Excretion (ADME).
Rationale: These four processes determine drug concentration at action sites over time, helping
predict onset, peak duration, and elimination.
Question 3: Define pharmacodynamics.
☑ Correct Answer: The impact of drugs on the body — the nature and intensity of the
response.
Rationale: Pharmacodynamics includes receptor binding, post-receptor effects, and clinical
response. It answers "What does the drug do to the body?"
Question 4: A drug reaches steady-state concentration in approximately how many half-lives?
☑ Correct Answer: Five half-lives.
,2
Rationale: Steady state is achieved when the rate of drug administration equals the rate of
elimination. Approximately 94% of steady state is reached after four half-lives, and over 97%
after five half-lives.
Question 5: A patient is prescribed a drug with a half-life of 8 hours. How long will it take to
reach steady-state concentration with regular dosing?
☑ Correct Answer: 40 hours.
Rationale: 8 hours × 5 half-lives = 40 hours to reach approximately 97% of steady-state
concentration.
Question 6: Define the term "half-life" (t½).
☑ Correct Answer: The time required for the amount of drug in the body to decrease by
50%.
Rationale: Half-life determines dosing interval, time to steady state, and time for drug
elimination from the body.
Question 7: Zero-order kinetics means:
A) A constant fraction of the drug is eliminated per hour
B) A constant amount of the drug is eliminated per unit time
C) Half-life remains constant
D) First-pass effect is absent
☑ Correct Answer: B) A constant amount of the drug is eliminated per unit time.
Rationale: Zero-order kinetics eliminates a fixed amount per hour regardless of concentration.
Half-life increases with dose. Examples: phenytoin (therapeutic doses), high-dose alcohol, high-
dose aspirin.
Question 8: A drug with a narrow therapeutic index requires:
A) No monitoring
B) Therapeutic drug monitoring (TDM)
,3
C) Administration with a high-fat meal
D) Twice-daily dosing
☑ Correct Answer: B) Therapeutic drug monitoring (TDM).
Rationale: Narrow therapeutic index drugs (e.g., warfarin, phenytoin, digoxin, lithium) have a
small margin between therapeutic and toxic doses. Serum concentration monitoring is essential
to maintain efficacy and avoid toxicity.
Question 9: What is a "free drug"?
A) The drug not bound to protein, free to exert therapeutic effect
B) The drug that is completely metabolized
C) The drug that is excreted unchanged
D) The drug that is bound to albumin
☑ Correct Answer: A) The drug not bound to protein, free to exert therapeutic effect.
Rationale: Only unbound (free) drug can cross cell membranes and bind to receptors to
produce a pharmacologic effect. Protein-bound drug serves as a reservoir but is inactive.
Conditions affecting protein binding (malnutrition, liver disease) can alter drug effects.
Question 10: A patient is prescribed a drug that is 95% protein-bound. Which statement best
describes the clinical significance of this property?
A) The drug will have a rapid onset of action.
B) The drug will be extensively metabolized by the liver.
C) Another highly protein-bound drug may displace it, increasing free drug levels and risk of
toxicity.
D) The drug will be eliminated unchanged by the kidneys.
☑ Correct Answer: C) Another highly protein-bound drug may displace it, increasing free
drug levels and risk of toxicity.
, 4
Rationale: Highly protein-bound drugs (e.g., warfarin, phenytoin) have a small free fraction. If a
second highly bound drug is added, competition for binding sites can displace the first drug,
increasing free (active) levels and potentially causing toxicity.
Question 11: The CYP450 enzyme system is responsible for:
A) Drug excretion in the urine
B) Phase I drug metabolism
C) Drug absorption from the GI tract
D) Drug distribution to tissues
☑ Correct Answer: B) Phase I drug metabolism.
Rationale: CYP450 enzymes (primarily in liver) perform Phase I metabolism (oxidation,
reduction, hydrolysis). Important isoenzymes: 3A4 (50% of drugs), 2D6, 2C9, 2C19, 1A2.
Question 12: How does grapefruit juice affect CYP450 metabolism?
A) CYP450 inducer – increases metabolism
B) CYP450 inhibitor – decreases metabolism, potential toxicity
C) No effect on metabolism
D) Only affects absorption
☑ Correct Answer: B) CYP450 inhibitor – decreases metabolism, potential toxicity.
Rationale: Grapefruit juice inhibits CYP3A4, the enzyme responsible for metabolizing many
drugs (statins, calcium channel blockers). This inhibition increases drug levels, potentially
causing toxicity.
Question 13: The first-pass effect refers to:
A) Rapid distribution of drug to tissues
B) Metabolism of a drug before it reaches systemic circulation
C) Binding of drug to plasma proteins
D) Excretion of drug in urine
