University of South Alabama
NU 578 Advanced Pharmacology
Unit 1 Exam Study Guide
About This Resource
This comprehensive study guide contains 150 verified questions and detailed
rationales covering all major content areas for the NU 578 Unit 1 Exam. This exam
typically covers foundational pharmacology principles, pharmacokinetics,
pharmacodynamics, and major drug classes including autonomic nervous system
agents, cardiovascular medications, and central nervous system drugs.
How to Use This Guide
• Review each question and attempt to answer before reading the rationale
• Focus on understanding mechanisms of action, indications, and adverse effects
• Pay special attention to drug interactions and patient monitoring parameters
SECTION 1: PHARMACOKINETICS AND
PHARMACODYNAMICS
*(Questions 1-25)*
1. A 75-year-old patient is prescribed a medication that is highly protein-bound. Due
to age-related changes, the patient has decreased serum albumin. What effect does
this have on the medication?
• A) Decreased free drug concentration
,• B) Increased free drug concentration
• C) No change in drug concentration
• D) Decreased drug absorption
Answer: B) Increased free drug concentration
Expert Rationale: Decreased albumin levels result in fewer protein-binding sites,
leading to a higher proportion of unbound (free) drug. Free drug is
pharmacologically active and can lead to increased drug effect and toxicity. This is
particularly important for highly protein-bound drugs (>90%) such as warfarin,
phenytoin, and diazepam .
2. A drug has a half-life of 12 hours. Approximately how long will it take to reach
steady-state concentration?
• A) 12 hours
• B) 24 hours
• C) 48 hours
• D) 60 hours
Answer: D) 60 hours
Expert Rationale: Steady-state concentration is achieved after approximately 4-5
half-lives. With a half-life of 12 hours, 5 half-lives = 60 hours (2.5 days). At steady
state, drug elimination equals drug absorption .
3. Which phase of drug metabolism involves conjugation reactions that increase
water solubility for renal excretion?
• A) Phase I
• B) Phase II
• C) Phase III
• D) Phase 0
Answer: B) Phase II
Expert Rationale: Phase II reactions (conjugation) include glucuronidation,
sulfation, acetylation, and methylation. These reactions increase water solubility,
, facilitating renal excretion. Phase I reactions (oxidation, reduction, hydrolysis)
typically involve cytochrome P450 enzymes .
4. A patient with hepatic impairment is prescribed a medication metabolized by the
cytochrome P450 system. What adjustment is likely needed?
• A) Increased dose
• B) Decreased dose or prolonged interval
• C) No adjustment needed
• D) Switch to IV formulation
Answer: B) Decreased dose or prolonged interval
Expert Rationale: Hepatic impairment reduces drug metabolism, leading to
increased drug levels and prolonged half-life. Dose reduction or extended dosing
intervals are often required to prevent toxicity .
5. Which of the following statements best describes bioavailability?
• A) The amount of drug that reaches systemic circulation unchanged
• B) The rate at which drug is absorbed
• C) The volume of distribution of the drug
• D) The time to reach peak concentration
Answer: A) The amount of drug that reaches systemic circulation unchanged
Expert Rationale: Bioavailability (F) is the fraction of administered drug that
reaches systemic circulation unchanged. IV administration has 100% bioavailability.
Oral bioavailability is affected by absorption and first-pass metabolism .
6. A drug with a narrow therapeutic index requires which type of monitoring?
• A) No monitoring needed
• B) Routine therapeutic drug monitoring
• C) Annual monitoring only
, • D) Monitoring only at initiation
Answer: B) Routine therapeutic drug monitoring
Expert Rationale: Drugs with a narrow therapeutic index (e.g., lithium, digoxin,
warfarin, phenytoin) have a small margin between therapeutic and toxic doses.
Regular serum level monitoring is essential to maintain efficacy and prevent toxicity .
7. What is the volume of distribution (Vd) if a drug primarily distributes into adipose
tissue?
• A) Low Vd
• B) High Vd
• C) Vd equal to plasma volume
• D) Vd equal to total body water
Answer: B) High Vd
Expert Rationale: Volume of distribution reflects the extent of drug distribution
into tissues. Drugs that are highly lipophilic and distribute into adipose tissue have a
high Vd (e.g., digoxin, amiodarone). Drugs confined to plasma have low Vd (e.g.,
heparin) .
8. Which cytochrome P450 enzyme is responsible for metabolizing the largest
number of drugs?
• A) CYP1A2
• B) CYP2C9
• C) CYP2D6
• D) CYP3A4
Answer: D) CYP3A4
Expert Rationale: CYP3A4 is responsible for metabolizing approximately 50% of
all drugs. It is involved in the metabolism of many medications including statins,
calcium channel blockers, benzodiazepines, and immunosuppressants .
NU 578 Advanced Pharmacology
Unit 1 Exam Study Guide
About This Resource
This comprehensive study guide contains 150 verified questions and detailed
rationales covering all major content areas for the NU 578 Unit 1 Exam. This exam
typically covers foundational pharmacology principles, pharmacokinetics,
pharmacodynamics, and major drug classes including autonomic nervous system
agents, cardiovascular medications, and central nervous system drugs.
How to Use This Guide
• Review each question and attempt to answer before reading the rationale
• Focus on understanding mechanisms of action, indications, and adverse effects
• Pay special attention to drug interactions and patient monitoring parameters
SECTION 1: PHARMACOKINETICS AND
PHARMACODYNAMICS
*(Questions 1-25)*
1. A 75-year-old patient is prescribed a medication that is highly protein-bound. Due
to age-related changes, the patient has decreased serum albumin. What effect does
this have on the medication?
• A) Decreased free drug concentration
,• B) Increased free drug concentration
• C) No change in drug concentration
• D) Decreased drug absorption
Answer: B) Increased free drug concentration
Expert Rationale: Decreased albumin levels result in fewer protein-binding sites,
leading to a higher proportion of unbound (free) drug. Free drug is
pharmacologically active and can lead to increased drug effect and toxicity. This is
particularly important for highly protein-bound drugs (>90%) such as warfarin,
phenytoin, and diazepam .
2. A drug has a half-life of 12 hours. Approximately how long will it take to reach
steady-state concentration?
• A) 12 hours
• B) 24 hours
• C) 48 hours
• D) 60 hours
Answer: D) 60 hours
Expert Rationale: Steady-state concentration is achieved after approximately 4-5
half-lives. With a half-life of 12 hours, 5 half-lives = 60 hours (2.5 days). At steady
state, drug elimination equals drug absorption .
3. Which phase of drug metabolism involves conjugation reactions that increase
water solubility for renal excretion?
• A) Phase I
• B) Phase II
• C) Phase III
• D) Phase 0
Answer: B) Phase II
Expert Rationale: Phase II reactions (conjugation) include glucuronidation,
sulfation, acetylation, and methylation. These reactions increase water solubility,
, facilitating renal excretion. Phase I reactions (oxidation, reduction, hydrolysis)
typically involve cytochrome P450 enzymes .
4. A patient with hepatic impairment is prescribed a medication metabolized by the
cytochrome P450 system. What adjustment is likely needed?
• A) Increased dose
• B) Decreased dose or prolonged interval
• C) No adjustment needed
• D) Switch to IV formulation
Answer: B) Decreased dose or prolonged interval
Expert Rationale: Hepatic impairment reduces drug metabolism, leading to
increased drug levels and prolonged half-life. Dose reduction or extended dosing
intervals are often required to prevent toxicity .
5. Which of the following statements best describes bioavailability?
• A) The amount of drug that reaches systemic circulation unchanged
• B) The rate at which drug is absorbed
• C) The volume of distribution of the drug
• D) The time to reach peak concentration
Answer: A) The amount of drug that reaches systemic circulation unchanged
Expert Rationale: Bioavailability (F) is the fraction of administered drug that
reaches systemic circulation unchanged. IV administration has 100% bioavailability.
Oral bioavailability is affected by absorption and first-pass metabolism .
6. A drug with a narrow therapeutic index requires which type of monitoring?
• A) No monitoring needed
• B) Routine therapeutic drug monitoring
• C) Annual monitoring only
, • D) Monitoring only at initiation
Answer: B) Routine therapeutic drug monitoring
Expert Rationale: Drugs with a narrow therapeutic index (e.g., lithium, digoxin,
warfarin, phenytoin) have a small margin between therapeutic and toxic doses.
Regular serum level monitoring is essential to maintain efficacy and prevent toxicity .
7. What is the volume of distribution (Vd) if a drug primarily distributes into adipose
tissue?
• A) Low Vd
• B) High Vd
• C) Vd equal to plasma volume
• D) Vd equal to total body water
Answer: B) High Vd
Expert Rationale: Volume of distribution reflects the extent of drug distribution
into tissues. Drugs that are highly lipophilic and distribute into adipose tissue have a
high Vd (e.g., digoxin, amiodarone). Drugs confined to plasma have low Vd (e.g.,
heparin) .
8. Which cytochrome P450 enzyme is responsible for metabolizing the largest
number of drugs?
• A) CYP1A2
• B) CYP2C9
• C) CYP2D6
• D) CYP3A4
Answer: D) CYP3A4
Expert Rationale: CYP3A4 is responsible for metabolizing approximately 50% of
all drugs. It is involved in the metabolism of many medications including statins,
calcium channel blockers, benzodiazepines, and immunosuppressants .
