D441 Pharmacology Practice Exam 2026 |WGU
1. A nurse is reviewing a patient’s medication list and sees that the patient takes
a drug with a high first-pass effect. Which route of administration would most
likely result in the lowest bioavailability for this drug?
A. Intravenous
B. Oral
C. Sublingual
D. Intramuscular
Answer: B
Rationale: The first-pass effect refers to the metabolism of a drug by the liver after oral
administration before it reaches systemic circulation. Oral drugs travel through the portal
vein to the liver, whereas other routes bypass the liver initially.
2. A patient is prescribed Albuterol for the management of asthma. What is the
primary mechanism of action for this medication?
A. Antagonism of cholinergic receptors
B. Activation of beta-2 adrenergic receptors
C. Inhibition of leukotriene synthesis
D. Blockade of histamine-1 receptors
Answer: B
Rationale: Albuterol is a short-acting beta-2 agonist (SABA) that triggers bronchodilation
by stimulating beta-2 receptors in the lungs.
,3. Which laboratory value is most critical for a nurse to monitor in a patient
receiving Warfarin therapy?
A. International Normalized Ratio (INR)
B. Activated partial thromboplastin time (aPTT)
C. Serum potassium levels
D. White blood cell count
Answer: A
Rationale: The INR (International Normalized Ratio) is the standard measurement used to
monitor the effectiveness of Warfarin. aPTT is used for Heparin.
4. A patient who has been taking Prednisone for several weeks is told they must
taper the dose rather than stopping abruptly. Why is this necessary?
A. To prevent rebound hypertension
B. To reduce the risk of peptic ulcer disease
C. To avoid acute adrenal insufficiency
D. To minimize the risk of hyperglycemia
Answer: C
Rationale: Exogenous glucocorticoids suppress the hypothalamic-pituitary-adrenal (HPA)
axis. Abrupt withdrawal can lead to adrenal crisis because the body cannot immediately
resume cortisol production.
5. A nurse is caring for a patient receiving Digoxin. Which electrolyte imbalance
increases the risk for Digoxin toxicity?
A. Hyperkalemia
B. Hypocalcemia
C. Hyponatremia
D. Hypokalemia
Answer: D
, Rationale: Low potassium levels (hypokalemia) increase the risk of Digoxin toxicity
because potassium and Digoxin compete for binding sites on the sodium-potassium ATPase
pump.
6. What is the pharmacological antidote for a patient experiencing an overdose
of Heparin?
A. Protamine sulfate
B. Vitamin K
C. Flumazenil
D. Acetylcysteine
Answer: A
Rationale: Protamine sulfate is the specific antagonist used to neutralize the anticoagulant
effects of Heparin.
7. A patient is prescribed Atorvastatin (Lipitor). The nurse should instruct the
patient to report which of the following symptoms immediately?
A. Muscle pain or weakness
B. Dry cough
C. Increased appetite
D. Frequent urination
Answer: A
Rationale: Unexplained muscle pain or weakness can be a sign of rhabdomyolysis, a
serious side effect of statin medications that can lead to renal failure.
1. A nurse is reviewing a patient’s medication list and sees that the patient takes
a drug with a high first-pass effect. Which route of administration would most
likely result in the lowest bioavailability for this drug?
A. Intravenous
B. Oral
C. Sublingual
D. Intramuscular
Answer: B
Rationale: The first-pass effect refers to the metabolism of a drug by the liver after oral
administration before it reaches systemic circulation. Oral drugs travel through the portal
vein to the liver, whereas other routes bypass the liver initially.
2. A patient is prescribed Albuterol for the management of asthma. What is the
primary mechanism of action for this medication?
A. Antagonism of cholinergic receptors
B. Activation of beta-2 adrenergic receptors
C. Inhibition of leukotriene synthesis
D. Blockade of histamine-1 receptors
Answer: B
Rationale: Albuterol is a short-acting beta-2 agonist (SABA) that triggers bronchodilation
by stimulating beta-2 receptors in the lungs.
,3. Which laboratory value is most critical for a nurse to monitor in a patient
receiving Warfarin therapy?
A. International Normalized Ratio (INR)
B. Activated partial thromboplastin time (aPTT)
C. Serum potassium levels
D. White blood cell count
Answer: A
Rationale: The INR (International Normalized Ratio) is the standard measurement used to
monitor the effectiveness of Warfarin. aPTT is used for Heparin.
4. A patient who has been taking Prednisone for several weeks is told they must
taper the dose rather than stopping abruptly. Why is this necessary?
A. To prevent rebound hypertension
B. To reduce the risk of peptic ulcer disease
C. To avoid acute adrenal insufficiency
D. To minimize the risk of hyperglycemia
Answer: C
Rationale: Exogenous glucocorticoids suppress the hypothalamic-pituitary-adrenal (HPA)
axis. Abrupt withdrawal can lead to adrenal crisis because the body cannot immediately
resume cortisol production.
5. A nurse is caring for a patient receiving Digoxin. Which electrolyte imbalance
increases the risk for Digoxin toxicity?
A. Hyperkalemia
B. Hypocalcemia
C. Hyponatremia
D. Hypokalemia
Answer: D
, Rationale: Low potassium levels (hypokalemia) increase the risk of Digoxin toxicity
because potassium and Digoxin compete for binding sites on the sodium-potassium ATPase
pump.
6. What is the pharmacological antidote for a patient experiencing an overdose
of Heparin?
A. Protamine sulfate
B. Vitamin K
C. Flumazenil
D. Acetylcysteine
Answer: A
Rationale: Protamine sulfate is the specific antagonist used to neutralize the anticoagulant
effects of Heparin.
7. A patient is prescribed Atorvastatin (Lipitor). The nurse should instruct the
patient to report which of the following symptoms immediately?
A. Muscle pain or weakness
B. Dry cough
C. Increased appetite
D. Frequent urination
Answer: A
Rationale: Unexplained muscle pain or weakness can be a sign of rhabdomyolysis, a
serious side effect of statin medications that can lead to renal failure.
