HESI PHARMACOLOGY NGN
PRACTICE TEST 2026 QUESTIONS
AND ANSWERS WITH
RATIONALES/GRADED A+/2026
UPDATE/100% CORRECT
/INSTANT DOWNLOAD
SECTION I: PHARMACOLOGICAL CORE CONCEPTS
(Questions 1-20)
1. A nurse is teaching a patient about the enteral route of medication
administration. Which statement by the patient indicates understanding?
A. "I will receive my insulin through a tube in my nose."
B. "The medication will be injected directly into my bloodstream."
C. "I will swallow the pills, and they will be absorbed through my digestive
tract."
D. "The drug will be applied to my skin for systemic effect."
• Rationale: Enteral administration involves swallowing medication (PO) or
delivery via nasogastric (NG) tube for absorption through the GI tract. Insulin
is parenteral; IV is direct bloodstream; topical is cutaneous.
2. A patient is prescribed a loading dose of digoxin. What is the primary
purpose of a loading dose?
A. To reduce the risk of adverse effects
B. To maintain a steady drug level over time
C. To achieve a therapeutic effect rapidly
D. To prolong the half-life of the medication
• Rationale: A loading dose quickly achieves therapeutic drug levels.
Maintenance doses then keep the level steady. It does not reduce side effects
or prolong half-life.
,3. Which pharmacokinetic process involves the movement of a drug from the
bloodstream into tissues and organs?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
• Rationale: Distribution is the transport of a drug via the bloodstream to its
site of action. Absorption (into blood), metabolism (biotransformation),
excretion (removal).
4. A nurse reviews a patient’s medication list and notes a high risk for
hepatotoxicity. The nurse should prioritize monitoring which laboratory value?
A. Serum creatinine
B. Alanine aminotransferase (ALT)
C. White blood cell count
D. Hemoglobin A1C
• Rationale: ALT is a liver enzyme that rises with hepatocellular damage
(hepatotoxicity). Creatinine = kidneys; WBC = infection; A1C = glucose
control.
5. The nurse administers naloxone to a patient with suspected opioid overdose.
This is an example of which drug interaction?
A. Synergistic effect
B. Additive effect
C. Antagonist effect
D. Idiosyncratic reaction
• Rationale: Naloxone is an opioid antagonist—it blocks opioid receptors,
reversing effects. Synergistic = combined effect greater than sum; additive =
sum effect; idiosyncratic = unusual genetic response.
6. A patient’s drug has a half-life of 12 hours. How many hours until steady
state is reached?
A. 24 hours
B. 60 hours
C. 48 hours
D. 36 hours
• Rationale: Steady state is reached in approximately 4–5 half-lives. 12 hours ×
5 = 60 hours.
7. Which patient assessment is most critical before administering a beta-blocker
like metoprolol?
, A. Respiratory rate
B. Temperature
C. Heart rate and blood pressure
D. Oxygen saturation
• Rationale: Beta-blockers reduce heart rate and contractility, lowering BP and
HR. Bradycardia and hypotension are major risks. Always check HR (hold if
<60) and BP.
8. A nurse is providing discharge teaching for warfarin. Which dietary
instruction is most important?
A. Increase intake of green leafy vegetables.
B. Maintain consistent intake of vitamin K-rich foods.
C. Avoid all foods containing vitamin C.
D. Take warfarin with grapefruit juice.
• Rationale: Warfarin (Coumadin) works by inhibiting vitamin K–dependent
clotting factors. Consistency in vitamin K intake prevents INR fluctuations.
Avoid drastic changes.
9. Which medication requires the nurse to monitor serum potassium levels due
to risk of hyperkalemia?
A. Furosemide (Lasix)
B. Hydrochlorothiazide (HCTZ)
C. Spironolactone (Aldactone)
D. Metolazone
• Rationale: Spironolactone is a potassium-sparing diuretic. It blocks
aldosterone, reducing K+ excretion → risk of hyperkalemia. Furosemide and
HCTZ cause hypokalemia.
10. The nurse administers a drug that is 98% protein-bound. What is the clinical
significance of this?
A. The drug will be excreted rapidly.
B. A second highly protein-bound drug may displace it, increasing free drug and
toxicity.
C. The drug is safe to use in liver failure.
D. It has a very short duration of action.
• Rationale: Only free (unbound) drug is pharmacologically active.
Displacement by another protein-bound drug increases free levels, leading to
toxicity.
11. A patient on lithium therapy has a new order for hydrochlorothiazide. The
nurse anticipates what effect?
PRACTICE TEST 2026 QUESTIONS
AND ANSWERS WITH
RATIONALES/GRADED A+/2026
UPDATE/100% CORRECT
/INSTANT DOWNLOAD
SECTION I: PHARMACOLOGICAL CORE CONCEPTS
(Questions 1-20)
1. A nurse is teaching a patient about the enteral route of medication
administration. Which statement by the patient indicates understanding?
A. "I will receive my insulin through a tube in my nose."
B. "The medication will be injected directly into my bloodstream."
C. "I will swallow the pills, and they will be absorbed through my digestive
tract."
D. "The drug will be applied to my skin for systemic effect."
• Rationale: Enteral administration involves swallowing medication (PO) or
delivery via nasogastric (NG) tube for absorption through the GI tract. Insulin
is parenteral; IV is direct bloodstream; topical is cutaneous.
2. A patient is prescribed a loading dose of digoxin. What is the primary
purpose of a loading dose?
A. To reduce the risk of adverse effects
B. To maintain a steady drug level over time
C. To achieve a therapeutic effect rapidly
D. To prolong the half-life of the medication
• Rationale: A loading dose quickly achieves therapeutic drug levels.
Maintenance doses then keep the level steady. It does not reduce side effects
or prolong half-life.
,3. Which pharmacokinetic process involves the movement of a drug from the
bloodstream into tissues and organs?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
• Rationale: Distribution is the transport of a drug via the bloodstream to its
site of action. Absorption (into blood), metabolism (biotransformation),
excretion (removal).
4. A nurse reviews a patient’s medication list and notes a high risk for
hepatotoxicity. The nurse should prioritize monitoring which laboratory value?
A. Serum creatinine
B. Alanine aminotransferase (ALT)
C. White blood cell count
D. Hemoglobin A1C
• Rationale: ALT is a liver enzyme that rises with hepatocellular damage
(hepatotoxicity). Creatinine = kidneys; WBC = infection; A1C = glucose
control.
5. The nurse administers naloxone to a patient with suspected opioid overdose.
This is an example of which drug interaction?
A. Synergistic effect
B. Additive effect
C. Antagonist effect
D. Idiosyncratic reaction
• Rationale: Naloxone is an opioid antagonist—it blocks opioid receptors,
reversing effects. Synergistic = combined effect greater than sum; additive =
sum effect; idiosyncratic = unusual genetic response.
6. A patient’s drug has a half-life of 12 hours. How many hours until steady
state is reached?
A. 24 hours
B. 60 hours
C. 48 hours
D. 36 hours
• Rationale: Steady state is reached in approximately 4–5 half-lives. 12 hours ×
5 = 60 hours.
7. Which patient assessment is most critical before administering a beta-blocker
like metoprolol?
, A. Respiratory rate
B. Temperature
C. Heart rate and blood pressure
D. Oxygen saturation
• Rationale: Beta-blockers reduce heart rate and contractility, lowering BP and
HR. Bradycardia and hypotension are major risks. Always check HR (hold if
<60) and BP.
8. A nurse is providing discharge teaching for warfarin. Which dietary
instruction is most important?
A. Increase intake of green leafy vegetables.
B. Maintain consistent intake of vitamin K-rich foods.
C. Avoid all foods containing vitamin C.
D. Take warfarin with grapefruit juice.
• Rationale: Warfarin (Coumadin) works by inhibiting vitamin K–dependent
clotting factors. Consistency in vitamin K intake prevents INR fluctuations.
Avoid drastic changes.
9. Which medication requires the nurse to monitor serum potassium levels due
to risk of hyperkalemia?
A. Furosemide (Lasix)
B. Hydrochlorothiazide (HCTZ)
C. Spironolactone (Aldactone)
D. Metolazone
• Rationale: Spironolactone is a potassium-sparing diuretic. It blocks
aldosterone, reducing K+ excretion → risk of hyperkalemia. Furosemide and
HCTZ cause hypokalemia.
10. The nurse administers a drug that is 98% protein-bound. What is the clinical
significance of this?
A. The drug will be excreted rapidly.
B. A second highly protein-bound drug may displace it, increasing free drug and
toxicity.
C. The drug is safe to use in liver failure.
D. It has a very short duration of action.
• Rationale: Only free (unbound) drug is pharmacologically active.
Displacement by another protein-bound drug increases free levels, leading to
toxicity.
11. A patient on lithium therapy has a new order for hydrochlorothiazide. The
nurse anticipates what effect?
