,NURS 6521 Advanced Pharmacology —
INSTANT PDF DOWNLOAD — Verified NURS
6521 Exam Prep | Walden University | Q & A |
2026/2027 Edition
1. A 68-year-old patient with cirrhosis and hypoalbuminemia is prescribed a highly protein-
bound medication. The nurse practitioner understands that the free (active) drug concentration
will be:
A. Decreased due to increased protein binding capacity
B. Increased due to reduced albumin available for protein binding
C. Unchanged because protein binding does not affect free drug levels
D. Decreased because the liver cannot metabolize the drug
Correct Answer: B
Rationale: In hypoalbuminemia (e.g., cirrhosis), there is less albumin available to bind the drug.
Because only free (unbound) drug is pharmacologically active, a decrease in protein binding
leads to an increase in free drug concentration, potentially increasing both therapeutic and toxic
effects. This is a critical consideration when prescribing highly protein-bound drugs to patients
with liver disease or malnutrition.
2. A drug with a half-life of 6 hours is administered intravenously. Approximately how long will it
take to reach steady state?
,A. 12 hours
B. 18 hours
C. 30 hours
D. 48 hours
Correct Answer: C
Rationale: Steady state is reached after approximately 4–5 half-lives. With a half-life of 6 hours,
5 × 6 = 30 hours. At steady state, the rate of drug administration equals the rate of drug
elimination. Understanding half-life is essential for determining dosing intervals and timing of
serum drug level monitoring.
3. Which factor most affects the oral bioavailability of a drug?
A. First-pass metabolism
B. Drug half-life
C. Plasma protein binding
D. Renal excretion
Correct Answer: A
Rationale: First-pass metabolism in the liver reduces the amount of active drug reaching
systemic circulation after oral administration, directly affecting bioavailability. Drugs with
extensive first-pass metabolism (e.g., nitroglycerin, propranolol) require higher oral doses or
, alternative routes (e.g., sublingual, transdermal, IV). Half-life affects dosing frequency, not
bioavailability.
4. Which route of administration completely bypasses first-pass metabolism?
A. Oral
B. Intravenous
C. Rectal
D. Sublingual
Correct Answer: B
Rationale: Intravenous administration delivers drug directly into the bloodstream, completely
avoiding first-pass hepatic metabolism and resulting in 100% bioavailability. While sublingual
and rectal routes partially avoid first-pass metabolism, only IV administration bypasses it
entirely.
5. What does the term "therapeutic index" describe?
A. Drug potency
B. Ratio of toxic dose to effective dose
C. Drug absorption rate
D. Drug metabolism rate
INSTANT PDF DOWNLOAD — Verified NURS
6521 Exam Prep | Walden University | Q & A |
2026/2027 Edition
1. A 68-year-old patient with cirrhosis and hypoalbuminemia is prescribed a highly protein-
bound medication. The nurse practitioner understands that the free (active) drug concentration
will be:
A. Decreased due to increased protein binding capacity
B. Increased due to reduced albumin available for protein binding
C. Unchanged because protein binding does not affect free drug levels
D. Decreased because the liver cannot metabolize the drug
Correct Answer: B
Rationale: In hypoalbuminemia (e.g., cirrhosis), there is less albumin available to bind the drug.
Because only free (unbound) drug is pharmacologically active, a decrease in protein binding
leads to an increase in free drug concentration, potentially increasing both therapeutic and toxic
effects. This is a critical consideration when prescribing highly protein-bound drugs to patients
with liver disease or malnutrition.
2. A drug with a half-life of 6 hours is administered intravenously. Approximately how long will it
take to reach steady state?
,A. 12 hours
B. 18 hours
C. 30 hours
D. 48 hours
Correct Answer: C
Rationale: Steady state is reached after approximately 4–5 half-lives. With a half-life of 6 hours,
5 × 6 = 30 hours. At steady state, the rate of drug administration equals the rate of drug
elimination. Understanding half-life is essential for determining dosing intervals and timing of
serum drug level monitoring.
3. Which factor most affects the oral bioavailability of a drug?
A. First-pass metabolism
B. Drug half-life
C. Plasma protein binding
D. Renal excretion
Correct Answer: A
Rationale: First-pass metabolism in the liver reduces the amount of active drug reaching
systemic circulation after oral administration, directly affecting bioavailability. Drugs with
extensive first-pass metabolism (e.g., nitroglycerin, propranolol) require higher oral doses or
, alternative routes (e.g., sublingual, transdermal, IV). Half-life affects dosing frequency, not
bioavailability.
4. Which route of administration completely bypasses first-pass metabolism?
A. Oral
B. Intravenous
C. Rectal
D. Sublingual
Correct Answer: B
Rationale: Intravenous administration delivers drug directly into the bloodstream, completely
avoiding first-pass hepatic metabolism and resulting in 100% bioavailability. While sublingual
and rectal routes partially avoid first-pass metabolism, only IV administration bypasses it
entirely.
5. What does the term "therapeutic index" describe?
A. Drug potency
B. Ratio of toxic dose to effective dose
C. Drug absorption rate
D. Drug metabolism rate
