D441 Pharmacology Final Exam Practice Questions 2026 |WGU
1. A nurse is preparing to administer a medication that is classified as a partial
agonist. What is the characteristic effect of this drug?
A. It activates receptors with maximum efficacy.
B. It blocks the receptor site to prevent activation.
C. It binds irreversibly to the receptor site.
D. It activates receptors but with lower efficacy than a full agonist.
Answer: D
Rationale: A partial agonist binds to a receptor but produces a smaller effect than a full
agonist, even if all receptors are occupied.
2. Which pharmacokinetic process is most affected by a patient’s liver failure?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Answer: C
Rationale: The liver is the primary site for drug metabolism. Impaired liver function
typically reduces the rate of drug metabolism.
,3. A patient is prescribed an ACE inhibitor for hypertension. Which side effect is
a common reason for discontinuing this medication?
A. Peripheral edema
B. Hypokalemia
C. Persistent dry cough
D. Tachycardia
Answer: C
Rationale: ACE inhibitors prevent the breakdown of bradykinin in the lungs, which can
lead to a persistent, non-productive dry cough.
4. What is the antidote for a patient experiencing a heparin overdose?
A. Vitamin K
B. Protamine sulfate
C. Naloxone
D. Flumazenil
Answer: B
Rationale: Protamine sulfate is the specific antagonist used to neutralize the anticoagulant
effects of heparin.
5. Which laboratory value must be monitored closely for a patient taking
Furosemide (Lasix)?
A. Serum sodium
B. Serum potassium
C. Serum calcium
D. Serum glucose
Answer: B
Rationale: Furosemide is a loop diuretic that causes significant loss of potassium, putting
the patient at risk for hypokalemia.
, 6. A patient with Type 1 Diabetes is prescribed Lispro (Humalog) insulin. When
should this insulin be administered?
A. Immediately before or after eating
B. 30 to 60 minutes before a meal
C. Only at bedtime
D. Once daily in the morning
Answer: A
Rationale: Lispro is a rapid-acting insulin with an onset of 15 minutes; it should be given
within 15 minutes of a meal.
7. What is the primary mechanism of action of Metformin?
A. Decreasing hepatic glucose production and improving insulin sensitivity
B. Increasing glucose uptake in the kidneys
C. Stimulating the pancreas to release more insulin
D. Directly neutralizing glucose in the bloodstream
Answer: A
Rationale: Metformin works by reducing the amount of glucose produced by the liver and
increasing the sensitivity of muscle cells to insulin.
8. A patient is receiving Digoxin for heart failure. Which sign suggests Digoxin
toxicity?
A. Weight gain
B. Increased urinary output
C. Hyperkalemia
D. Visual disturbances like yellow-green halos
Answer: D
Rationale: Classic signs of digoxin toxicity include gastrointestinal distress and visual
changes such as blurred vision or yellow-tinted halos.
1. A nurse is preparing to administer a medication that is classified as a partial
agonist. What is the characteristic effect of this drug?
A. It activates receptors with maximum efficacy.
B. It blocks the receptor site to prevent activation.
C. It binds irreversibly to the receptor site.
D. It activates receptors but with lower efficacy than a full agonist.
Answer: D
Rationale: A partial agonist binds to a receptor but produces a smaller effect than a full
agonist, even if all receptors are occupied.
2. Which pharmacokinetic process is most affected by a patient’s liver failure?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Answer: C
Rationale: The liver is the primary site for drug metabolism. Impaired liver function
typically reduces the rate of drug metabolism.
,3. A patient is prescribed an ACE inhibitor for hypertension. Which side effect is
a common reason for discontinuing this medication?
A. Peripheral edema
B. Hypokalemia
C. Persistent dry cough
D. Tachycardia
Answer: C
Rationale: ACE inhibitors prevent the breakdown of bradykinin in the lungs, which can
lead to a persistent, non-productive dry cough.
4. What is the antidote for a patient experiencing a heparin overdose?
A. Vitamin K
B. Protamine sulfate
C. Naloxone
D. Flumazenil
Answer: B
Rationale: Protamine sulfate is the specific antagonist used to neutralize the anticoagulant
effects of heparin.
5. Which laboratory value must be monitored closely for a patient taking
Furosemide (Lasix)?
A. Serum sodium
B. Serum potassium
C. Serum calcium
D. Serum glucose
Answer: B
Rationale: Furosemide is a loop diuretic that causes significant loss of potassium, putting
the patient at risk for hypokalemia.
, 6. A patient with Type 1 Diabetes is prescribed Lispro (Humalog) insulin. When
should this insulin be administered?
A. Immediately before or after eating
B. 30 to 60 minutes before a meal
C. Only at bedtime
D. Once daily in the morning
Answer: A
Rationale: Lispro is a rapid-acting insulin with an onset of 15 minutes; it should be given
within 15 minutes of a meal.
7. What is the primary mechanism of action of Metformin?
A. Decreasing hepatic glucose production and improving insulin sensitivity
B. Increasing glucose uptake in the kidneys
C. Stimulating the pancreas to release more insulin
D. Directly neutralizing glucose in the bloodstream
Answer: A
Rationale: Metformin works by reducing the amount of glucose produced by the liver and
increasing the sensitivity of muscle cells to insulin.
8. A patient is receiving Digoxin for heart failure. Which sign suggests Digoxin
toxicity?
A. Weight gain
B. Increased urinary output
C. Hyperkalemia
D. Visual disturbances like yellow-green halos
Answer: D
Rationale: Classic signs of digoxin toxicity include gastrointestinal distress and visual
changes such as blurred vision or yellow-tinted halos.
