NU 578 Advanced Pharmacology
Exam 4 2026/2027 – Questions and
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1. A patient with heart failure with reduced ejection fraction
(HFrEF) is being managed on a beta-blocker. Which of the
following is the primary goal of beta-blocker therapy in this
patient population?
A) To increase cardiac contractility
B) To reduce heart rate and afterload
C) To counteract harmful neurohormonal activation and reduce
mortality
D) To promote diuresis and reduce preload
Correct Answer: C
Rationale: In patients with HFrEF, the chronic activation of the
sympathetic nervous system contributes to cardiac remodeling
and disease progression. Beta-blockers like carvedilol, metoprolol
succinate, and bisoprolol have been shown to reduce mortality by
, blocking this harmful neurohormonal activation. While they do
reduce heart rate, their primary mortality benefit stems from their
effect on the neurohormonal axis, not just from their negative
chronotropic effects.
2. A patient on digoxin for heart failure is also prescribed
furosemide for fluid overload. The nurse practitioner should
be most concerned about which electrolyte disturbance
increasing the risk of digoxin toxicity?
A) Hypercalcemia
B) Hypokalemia
C) Hypermagnesemia
D) Hypernatremia
Correct Answer: B
Rationale: Furosemide, a loop diuretic, causes potassium wasting.
Hypokalemia potentiates digoxin toxicity by increasing the drug's
binding affinity to the Na+/K+-ATPase pump, the site of its
action. This can lead to serious cardiac dysrhythmias. Serum
potassium levels should be closely monitored in patients taking
this combination.
3. Which drug class has the greatest effect on cardiac
conduction and is most likely to cause bradycardia and AV
block?
A) Dihydropyridines (e.g., amlodipine)
B) Phenylalkylamines (e.g., verapamil)
C) Benzothiazepines only (e.g., diltiazem)
D) Loop diuretics (e.g., torsemide)
, Correct Answer: B
Rationale: Phenylalkylamines, such as verapamil, have the most
significant effect on cardiac conduction among the calcium
channel blockers. They cause negative chronotropic and
dromotropic effects, leading to bradycardia and AV block.
Dihydropyridines like amlodipine primarily affect vascular smooth
muscle with minimal cardiac conduction effects. Diltiazem also has
conduction effects, but they are less pronounced than those of
verapamil.
4. A patient prescribed lisinopril develops a persistent,
bothersome dry cough. Which is the most appropriate
alternative antihypertensive agent for this patient?
A) Enalapril
B) Losartan
C) Hydralazine
D) Amlodipine
Correct Answer: B
Rationale: Angiotensin-converting enzyme (ACE) inhibitors like
lisinopril are known to cause a persistent dry cough due to the
accumulation of bradykinin. Angiotensin II receptor blockers
(ARBs) like losartan provide similar benefits in hypertension and
heart failure without affecting bradykinin, making them the most
appropriate and direct alternative for patients who cannot tolerate
an ACE inhibitor due to cough.
5. A patient with type 2 diabetes is started on metformin.
What is the primary mechanism of action of this medication?
, A) Stimulates insulin release from the pancreas
B) Increases glucose absorption in the gut
C) Reduces glucose production in the liver and increases glucose
uptake in peripheral tissues
D) Inhibits the breakdown of oligosaccharides into
monosaccharides
Correct Answer: C
Rationale: Metformin is a biguanide that works primarily by
decreasing hepatic glucose production (gluconeogenesis) and
increasing insulin sensitivity in peripheral tissues, thereby
enhancing glucose uptake. It does not stimulate insulin release,
which is the mechanism of sulfonylureas. Inhibiting carbohydrate
breakdown is the mechanism of action for alpha-glucosidase
inhibitors like acarbose.
6. A patient is prescribed a fluoroquinolone antibiotic. Which
of the following adverse effects is of highest concern and
requires patient education?
A) Red man syndrome
B) Achilles tendon rupture
C) Disulfiram-like reaction with alcohol
D) Permanent tooth discoloration
Correct Answer: B
Rationale: Fluoroquinolones, such as ciprofloxacin, carry a
significant risk of tendinitis and tendon rupture, particularly of the
Achilles tendon. The risk is heightened in patients over 60 years of
age, those on corticosteroid therapy, and patients with renal
Exam 4 2026/2027 – Questions and
Answers | 100% Verified |
Complete Verified Answers – Pass
Guaranteed – Already Graded
A+|Instant Download pdf
1. A patient with heart failure with reduced ejection fraction
(HFrEF) is being managed on a beta-blocker. Which of the
following is the primary goal of beta-blocker therapy in this
patient population?
A) To increase cardiac contractility
B) To reduce heart rate and afterload
C) To counteract harmful neurohormonal activation and reduce
mortality
D) To promote diuresis and reduce preload
Correct Answer: C
Rationale: In patients with HFrEF, the chronic activation of the
sympathetic nervous system contributes to cardiac remodeling
and disease progression. Beta-blockers like carvedilol, metoprolol
succinate, and bisoprolol have been shown to reduce mortality by
, blocking this harmful neurohormonal activation. While they do
reduce heart rate, their primary mortality benefit stems from their
effect on the neurohormonal axis, not just from their negative
chronotropic effects.
2. A patient on digoxin for heart failure is also prescribed
furosemide for fluid overload. The nurse practitioner should
be most concerned about which electrolyte disturbance
increasing the risk of digoxin toxicity?
A) Hypercalcemia
B) Hypokalemia
C) Hypermagnesemia
D) Hypernatremia
Correct Answer: B
Rationale: Furosemide, a loop diuretic, causes potassium wasting.
Hypokalemia potentiates digoxin toxicity by increasing the drug's
binding affinity to the Na+/K+-ATPase pump, the site of its
action. This can lead to serious cardiac dysrhythmias. Serum
potassium levels should be closely monitored in patients taking
this combination.
3. Which drug class has the greatest effect on cardiac
conduction and is most likely to cause bradycardia and AV
block?
A) Dihydropyridines (e.g., amlodipine)
B) Phenylalkylamines (e.g., verapamil)
C) Benzothiazepines only (e.g., diltiazem)
D) Loop diuretics (e.g., torsemide)
, Correct Answer: B
Rationale: Phenylalkylamines, such as verapamil, have the most
significant effect on cardiac conduction among the calcium
channel blockers. They cause negative chronotropic and
dromotropic effects, leading to bradycardia and AV block.
Dihydropyridines like amlodipine primarily affect vascular smooth
muscle with minimal cardiac conduction effects. Diltiazem also has
conduction effects, but they are less pronounced than those of
verapamil.
4. A patient prescribed lisinopril develops a persistent,
bothersome dry cough. Which is the most appropriate
alternative antihypertensive agent for this patient?
A) Enalapril
B) Losartan
C) Hydralazine
D) Amlodipine
Correct Answer: B
Rationale: Angiotensin-converting enzyme (ACE) inhibitors like
lisinopril are known to cause a persistent dry cough due to the
accumulation of bradykinin. Angiotensin II receptor blockers
(ARBs) like losartan provide similar benefits in hypertension and
heart failure without affecting bradykinin, making them the most
appropriate and direct alternative for patients who cannot tolerate
an ACE inhibitor due to cough.
5. A patient with type 2 diabetes is started on metformin.
What is the primary mechanism of action of this medication?
, A) Stimulates insulin release from the pancreas
B) Increases glucose absorption in the gut
C) Reduces glucose production in the liver and increases glucose
uptake in peripheral tissues
D) Inhibits the breakdown of oligosaccharides into
monosaccharides
Correct Answer: C
Rationale: Metformin is a biguanide that works primarily by
decreasing hepatic glucose production (gluconeogenesis) and
increasing insulin sensitivity in peripheral tissues, thereby
enhancing glucose uptake. It does not stimulate insulin release,
which is the mechanism of sulfonylureas. Inhibiting carbohydrate
breakdown is the mechanism of action for alpha-glucosidase
inhibitors like acarbose.
6. A patient is prescribed a fluoroquinolone antibiotic. Which
of the following adverse effects is of highest concern and
requires patient education?
A) Red man syndrome
B) Achilles tendon rupture
C) Disulfiram-like reaction with alcohol
D) Permanent tooth discoloration
Correct Answer: B
Rationale: Fluoroquinolones, such as ciprofloxacin, carry a
significant risk of tendinitis and tendon rupture, particularly of the
Achilles tendon. The risk is heightened in patients over 60 years of
age, those on corticosteroid therapy, and patients with renal
