NU 578 Units 1–5 Exam (2026/2027) (PDF) | Advanced
Nursing | University of South Alabama
SECTION I: FOUNDATIONAL PHARMACOLOGY PRINCIPLES
1. An advanced practice nurse is evaluating a patient's medication regimen.
Which property is the MOST important characteristic of an ideal drug?
A) Low cost and easy administration
B) Rapid onset and long duration of action
C) Effectiveness, safety, and selectivity
D) High potency and low efficacy
Correct Answer: C) Effectiveness, safety, and selectivity
Rationale: An ideal drug should be effective (producing the desired
therapeutic effect), safe (not causing significant harm), and selective (producing
only the desired effect without significant side effects). While cost, onset, and
potency are important considerations, effectiveness, safety, and selectivity are
the fundamental properties that define an ideal drug.
Why Other Options Are Incorrect:
• A) Low cost and easy administration are desirable but secondary to
therapeutic properties
• B) Rapid onset and long duration are beneficial but not the defining
characteristics
• D) High potency does not necessarily correlate with therapeutic value; low
efficacy would render a drug ineffective
2. A patient asks the nurse why they need to take a medication "on an empty
stomach." The nurse correctly explains that food can affect drug absorption by:
A) Increasing drug metabolism in the liver
B) Delaying gastric emptying and altering drug dissolution
,C) Enhancing drug distribution to tissues
D) Increasing renal excretion of the drug
Correct Answer: B) Delaying gastric emptying and altering drug
dissolution
Rationale: Food can significantly affect drug absorption by delaying gastric
emptying, altering gastric pH, and affecting drug dissolution. The "empty
stomach" rule (taking medication at least one hour before or two hours after a
meal) is recommended for drugs whose absorption is significantly decreased by
food. Fatty foods and alcohol can slow the absorption of oral medications.
Why Other Options Are Incorrect:
• A) Food affects absorption, not metabolism
• C) Food does not directly enhance drug distribution
• D) Food does not directly affect renal excretion
3. A patient is prescribed a medication with a high first-pass effect. The APN
explains that this drug will be administered by a route that bypasses the liver to
achieve therapeutic levels. Which route would be most appropriate?
A) Oral
B) Sublingual
C) Rectal
D) Enteral via nasogastric tube
Correct Answer: B) Sublingual
Rationale: The first-pass effect refers to the rapid hepatic inactivation of
certain oral drugs absorbed from the GI tract, which are carried directly to the
liver via the hepatic portal vein. Sublingual administration allows the drug to be
absorbed directly into systemic circulation, bypassing the liver and avoiding first-
pass metabolism. This is why nitroglycerin is administered sublingually.
Why Other Options Are Incorrect:
• A) Oral administration subjects the drug to first-pass metabolism
, • C) Rectal administration still undergoes significant first-pass metabolism,
though less than oral
• D) Enteral administration via NG tube still goes through the GI tract and
hepatic portal system
4. The APN is calculating the half-life of a drug with an initial concentration of
100 mg/L. After 8 hours, the concentration is 25 mg/L. What is the drug's half-
life?
A) 2 hours
B) 4 hours
C) 6 hours
D) 8 hours
Correct Answer: B) 4 hours
Rationale: Half-life is the time required for the amount of drug in the body
to decrease by 50%. Starting at 100 mg/L → after one half-life = 50 mg/L → after
two half-lives = 25 mg/L. Since it took 8 hours to reach 25 mg/L, this represents
two half-lives (8 hours ÷ 2 = 4 hours). The half-life is therefore 4 hours.
Why Other Options Are Incorrect:
• A) 2 hours would result in a concentration of 12.5 mg/L after 8 hours
• C) 6 hours would result in approximately 35 mg/L after 8 hours
• D) 8 hours would result in 50 mg/L at 8 hours
5. A drug that binds to a receptor and produces a maximum response is best
described as a:
A) Partial agonist
B) Full agonist
C) Competitive antagonist
D) Inverse agonist
, Correct Answer: B) Full agonist
Rationale: A full agonist binds to a receptor and mimics the endogenous
ligand to produce a maximum biological response. It has both high affinity for the
receptor and high intrinsic efficacy, resulting in maximal activation of the signaling
pathway.
Why Other Options Are Incorrect:
• A) Partial agonists produce a submaximal response even at full receptor
occupancy
• C) Competitive antagonists bind to receptors but do not activate them,
blocking agonist effects
• D) Inverse agonists bind to the same receptor but produce the opposite
effect of an agonist
6. A patient with renal impairment is prescribed a renally excreted drug. Which
adjustment would the APN anticipate?
A) Higher doses to achieve therapeutic effect
B) Lower doses to prevent drug accumulation
C) No change in dosing
D) More frequent administration
Correct Answer: B) Lower doses to prevent drug accumulation
Rationale: In renal impairment, drug excretion is reduced, leading to drug
accumulation and potential toxicity. Therefore, patients with renal impairment
typically require lower doses of renally excreted drugs. The progressive decline in
renal function and resulting drug accumulation is the most common cause of
adverse drug reactions in elderly patients.
Why Other Options Are Incorrect:
• A) Higher doses would increase risk of toxicity
• C) No change would be inappropriate as clearance is reduced
Nursing | University of South Alabama
SECTION I: FOUNDATIONAL PHARMACOLOGY PRINCIPLES
1. An advanced practice nurse is evaluating a patient's medication regimen.
Which property is the MOST important characteristic of an ideal drug?
A) Low cost and easy administration
B) Rapid onset and long duration of action
C) Effectiveness, safety, and selectivity
D) High potency and low efficacy
Correct Answer: C) Effectiveness, safety, and selectivity
Rationale: An ideal drug should be effective (producing the desired
therapeutic effect), safe (not causing significant harm), and selective (producing
only the desired effect without significant side effects). While cost, onset, and
potency are important considerations, effectiveness, safety, and selectivity are
the fundamental properties that define an ideal drug.
Why Other Options Are Incorrect:
• A) Low cost and easy administration are desirable but secondary to
therapeutic properties
• B) Rapid onset and long duration are beneficial but not the defining
characteristics
• D) High potency does not necessarily correlate with therapeutic value; low
efficacy would render a drug ineffective
2. A patient asks the nurse why they need to take a medication "on an empty
stomach." The nurse correctly explains that food can affect drug absorption by:
A) Increasing drug metabolism in the liver
B) Delaying gastric emptying and altering drug dissolution
,C) Enhancing drug distribution to tissues
D) Increasing renal excretion of the drug
Correct Answer: B) Delaying gastric emptying and altering drug
dissolution
Rationale: Food can significantly affect drug absorption by delaying gastric
emptying, altering gastric pH, and affecting drug dissolution. The "empty
stomach" rule (taking medication at least one hour before or two hours after a
meal) is recommended for drugs whose absorption is significantly decreased by
food. Fatty foods and alcohol can slow the absorption of oral medications.
Why Other Options Are Incorrect:
• A) Food affects absorption, not metabolism
• C) Food does not directly enhance drug distribution
• D) Food does not directly affect renal excretion
3. A patient is prescribed a medication with a high first-pass effect. The APN
explains that this drug will be administered by a route that bypasses the liver to
achieve therapeutic levels. Which route would be most appropriate?
A) Oral
B) Sublingual
C) Rectal
D) Enteral via nasogastric tube
Correct Answer: B) Sublingual
Rationale: The first-pass effect refers to the rapid hepatic inactivation of
certain oral drugs absorbed from the GI tract, which are carried directly to the
liver via the hepatic portal vein. Sublingual administration allows the drug to be
absorbed directly into systemic circulation, bypassing the liver and avoiding first-
pass metabolism. This is why nitroglycerin is administered sublingually.
Why Other Options Are Incorrect:
• A) Oral administration subjects the drug to first-pass metabolism
, • C) Rectal administration still undergoes significant first-pass metabolism,
though less than oral
• D) Enteral administration via NG tube still goes through the GI tract and
hepatic portal system
4. The APN is calculating the half-life of a drug with an initial concentration of
100 mg/L. After 8 hours, the concentration is 25 mg/L. What is the drug's half-
life?
A) 2 hours
B) 4 hours
C) 6 hours
D) 8 hours
Correct Answer: B) 4 hours
Rationale: Half-life is the time required for the amount of drug in the body
to decrease by 50%. Starting at 100 mg/L → after one half-life = 50 mg/L → after
two half-lives = 25 mg/L. Since it took 8 hours to reach 25 mg/L, this represents
two half-lives (8 hours ÷ 2 = 4 hours). The half-life is therefore 4 hours.
Why Other Options Are Incorrect:
• A) 2 hours would result in a concentration of 12.5 mg/L after 8 hours
• C) 6 hours would result in approximately 35 mg/L after 8 hours
• D) 8 hours would result in 50 mg/L at 8 hours
5. A drug that binds to a receptor and produces a maximum response is best
described as a:
A) Partial agonist
B) Full agonist
C) Competitive antagonist
D) Inverse agonist
, Correct Answer: B) Full agonist
Rationale: A full agonist binds to a receptor and mimics the endogenous
ligand to produce a maximum biological response. It has both high affinity for the
receptor and high intrinsic efficacy, resulting in maximal activation of the signaling
pathway.
Why Other Options Are Incorrect:
• A) Partial agonists produce a submaximal response even at full receptor
occupancy
• C) Competitive antagonists bind to receptors but do not activate them,
blocking agonist effects
• D) Inverse agonists bind to the same receptor but produce the opposite
effect of an agonist
6. A patient with renal impairment is prescribed a renally excreted drug. Which
adjustment would the APN anticipate?
A) Higher doses to achieve therapeutic effect
B) Lower doses to prevent drug accumulation
C) No change in dosing
D) More frequent administration
Correct Answer: B) Lower doses to prevent drug accumulation
Rationale: In renal impairment, drug excretion is reduced, leading to drug
accumulation and potential toxicity. Therefore, patients with renal impairment
typically require lower doses of renally excreted drugs. The progressive decline in
renal function and resulting drug accumulation is the most common cause of
adverse drug reactions in elderly patients.
Why Other Options Are Incorrect:
• A) Higher doses would increase risk of toxicity
• C) No change would be inappropriate as clearance is reduced
