1
RN HESI Pharmacology V3 Actual Exam
2026/2027 – Complete Exam-Style Questions
with Detailed Rationales | 100% Verified –
Pass Guaranteed – A+ Graded
Section 1: Cardiovascular & Hematologic Medications
Q1: A patient with heart failure is started on carvedilol. The nurse understands that carvedilol
differs from older beta-blockers because it also blocks which receptor, lowering both blood
pressure and systemic vascular resistance?
A. Beta-2 receptors
B. Alpha-1 receptors [CORRECT]
C. Angiotensin II receptors
D. Dopamine receptors
Correct Answer: B
Rationale: Carvedilol is a third-generation, non-selective beta-blocker that also has alpha-1
blocking activity. This dual action causes vasodilation, which reduces cardiac afterload and
makes it particularly effective in heart failure management, unlike traditional beta-blockers.
Q2: A patient taking lisinopril calls the clinic complaining of swelling of their lips and tongue
and difficulty breathing. The nurse instructs the patient to seek emergency care immediately due
to the risk of:
A. First-dose hypotension
B. Angioedema [CORRECT]
C. Dry, hacking cough
D. Hyperkalemia
Correct Answer: B
Rationale: ACE inhibitors can cause angioedema, a life-threatening swelling of the deep dermis
and subcutaneous tissues, most commonly affecting the face, lips, tongue, and throat. It is a
medical emergency due to the risk of airway compromise.
,2
Q3: A patient is prescribed simvastatin. Which instruction should the nurse include to prevent a
severe adverse effect?
A. "Take this medication in the morning with a high-fat meal."
B. "Avoid consuming grapefruit juice while taking this medication." [CORRECT]
C. "Take this medication on an empty stomach to increase absorption."
D. "Crush the tablet and mix it with applesauce."
Correct Answer: B
Rationale: Grapefruit juice inhibits CYP3A4, the enzyme responsible for metabolizing
simvastatin. This can lead to drastically increased blood levels of the statin, raising the risk of
myopathy and rhabdomyolysis. Statins should also never be crushed.
Q4: A patient with atrial fibrillation is being discharged on warfarin. The nurse understands that
which dietary modification is essential for this patient?
A. Increase intake of leafy green vegetables to prevent bleeding.
B. Maintain a consistent intake of foods containing vitamin K. [CORRECT]
C. Avoid all dairy products to prevent interactions.
D. Limit protein intake to reduce liver enzyme production.
Correct Answer: B
Rationale: Warfarin inhibits vitamin K-dependent clotting factors. Sudden increases in dietary
vitamin K (found in leafy greens) will decrease the INR, while sudden decreases will increase
the INR. The key is consistency, not avoidance.
Q5: A patient's morning lab work shows an INR of 5.8. The patient's home medication is
warfarin. The nurse anticipates the provider will order which medication as an antidote?
A. Protamine sulfate
B. Phytonadione (Vitamin K) [CORRECT]
C. Desmopressin
D. Aminocaproic acid
,3
Correct Answer: B
Rationale: Vitamin K (phytonadione) is the specific antidote for warfarin toxicity or an
excessively elevated INR. It promotes the hepatic synthesis of vitamin K-dependent clotting
factors to reverse the anticoagulant effect.
Q6: A patient is receiving a continuous heparin infusion. The morning aPTT is 90 seconds
(control 30 seconds). Which action should the nurse take?
A. Stop the infusion immediately.
B. Increase the infusion rate as ordered.
C. Notify the provider to decrease the rate. [CORRECT]
D. Administer protamine sulfate.
Correct Answer: C
Rationale: The therapeutic range for heparin is an aPTT of 1.5 to 2.5 times the control value. For
a control of 30 seconds, the target is 45 to 75 seconds. An aPTT of 90 seconds is
supratherapeutic, placing the patient at risk for bleeding; the provider should be notified to
decrease the rate.
Q7: A patient is prescribed apixaban. The nurse knows that compared to warfarin, apixaban has
which major advantage?
A. It requires frequent INR monitoring.
B. It has a specific reversal agent available.
C. It does not require routine coagulation monitoring. [CORRECT]
D. It can be safely used in patients with mechanical heart valves.
Correct Answer: C
Rationale: Direct oral anticoagulants (DOACs) like apixaban have a predictable pharmacokinetic
profile and do not require routine INR or aPTT monitoring, which is a significant advantage over
warfarin. They are contraindicated in mechanical heart valves.
Q8: A patient taking diltiazem develops severe constipation. The nurse explains that this occurs
because diltiazem:
, 4
A. Increases gastric acid production.
B. Decreases smooth muscle contraction in the GI tract. [CORRECT]
C. Blocks dopamine receptors in the gut.
D. Increases water absorption in the large intestine.
Correct Answer: B
Rationale: Diltiazem is a non-dihydropyridine calcium channel blocker. By blocking calcium
entry into smooth muscle cells, it decreases the contractility of the GI tract, leading to
significantly delayed transit time and severe constipation.
Q9: A patient with heart failure is prescribed spironolactone. Which laboratory value requires the
nurse to hold the medication and notify the provider?
A. Sodium 135 mEq/L
B. Potassium 6.2 mEq/L [CORRECT]
C. Calcium 8.5 mg/dL
D. Magnesium 1.8 mEq/L
Correct Answer: B
Rationale: Spironolactone is a potassium-sparing diuretic. A potassium level of 6.2 mEq/L is
hyperkalemia, which puts the patient at risk for fatal cardiac dysrhythmias. The nurse must hold
the medication to prevent further potassium retention.
Q10: A patient is receiving IV furosemide for acute pulmonary edema. Which electrolyte
imbalance is the highest priority for the nurse to monitor?
A. Hypernatremia
B. Hypokalemia [CORRECT]
C. Hypercalcemia
D. Hypomagnesemia
Correct Answer: B
Rationale: Loop diuretics cause a profound loss of potassium. Hypokalemia is a high priority
because it can lead to lethal cardiac dysrhythmias, especially in patients with heart failure who
may also be taking digoxin.
RN HESI Pharmacology V3 Actual Exam
2026/2027 – Complete Exam-Style Questions
with Detailed Rationales | 100% Verified –
Pass Guaranteed – A+ Graded
Section 1: Cardiovascular & Hematologic Medications
Q1: A patient with heart failure is started on carvedilol. The nurse understands that carvedilol
differs from older beta-blockers because it also blocks which receptor, lowering both blood
pressure and systemic vascular resistance?
A. Beta-2 receptors
B. Alpha-1 receptors [CORRECT]
C. Angiotensin II receptors
D. Dopamine receptors
Correct Answer: B
Rationale: Carvedilol is a third-generation, non-selective beta-blocker that also has alpha-1
blocking activity. This dual action causes vasodilation, which reduces cardiac afterload and
makes it particularly effective in heart failure management, unlike traditional beta-blockers.
Q2: A patient taking lisinopril calls the clinic complaining of swelling of their lips and tongue
and difficulty breathing. The nurse instructs the patient to seek emergency care immediately due
to the risk of:
A. First-dose hypotension
B. Angioedema [CORRECT]
C. Dry, hacking cough
D. Hyperkalemia
Correct Answer: B
Rationale: ACE inhibitors can cause angioedema, a life-threatening swelling of the deep dermis
and subcutaneous tissues, most commonly affecting the face, lips, tongue, and throat. It is a
medical emergency due to the risk of airway compromise.
,2
Q3: A patient is prescribed simvastatin. Which instruction should the nurse include to prevent a
severe adverse effect?
A. "Take this medication in the morning with a high-fat meal."
B. "Avoid consuming grapefruit juice while taking this medication." [CORRECT]
C. "Take this medication on an empty stomach to increase absorption."
D. "Crush the tablet and mix it with applesauce."
Correct Answer: B
Rationale: Grapefruit juice inhibits CYP3A4, the enzyme responsible for metabolizing
simvastatin. This can lead to drastically increased blood levels of the statin, raising the risk of
myopathy and rhabdomyolysis. Statins should also never be crushed.
Q4: A patient with atrial fibrillation is being discharged on warfarin. The nurse understands that
which dietary modification is essential for this patient?
A. Increase intake of leafy green vegetables to prevent bleeding.
B. Maintain a consistent intake of foods containing vitamin K. [CORRECT]
C. Avoid all dairy products to prevent interactions.
D. Limit protein intake to reduce liver enzyme production.
Correct Answer: B
Rationale: Warfarin inhibits vitamin K-dependent clotting factors. Sudden increases in dietary
vitamin K (found in leafy greens) will decrease the INR, while sudden decreases will increase
the INR. The key is consistency, not avoidance.
Q5: A patient's morning lab work shows an INR of 5.8. The patient's home medication is
warfarin. The nurse anticipates the provider will order which medication as an antidote?
A. Protamine sulfate
B. Phytonadione (Vitamin K) [CORRECT]
C. Desmopressin
D. Aminocaproic acid
,3
Correct Answer: B
Rationale: Vitamin K (phytonadione) is the specific antidote for warfarin toxicity or an
excessively elevated INR. It promotes the hepatic synthesis of vitamin K-dependent clotting
factors to reverse the anticoagulant effect.
Q6: A patient is receiving a continuous heparin infusion. The morning aPTT is 90 seconds
(control 30 seconds). Which action should the nurse take?
A. Stop the infusion immediately.
B. Increase the infusion rate as ordered.
C. Notify the provider to decrease the rate. [CORRECT]
D. Administer protamine sulfate.
Correct Answer: C
Rationale: The therapeutic range for heparin is an aPTT of 1.5 to 2.5 times the control value. For
a control of 30 seconds, the target is 45 to 75 seconds. An aPTT of 90 seconds is
supratherapeutic, placing the patient at risk for bleeding; the provider should be notified to
decrease the rate.
Q7: A patient is prescribed apixaban. The nurse knows that compared to warfarin, apixaban has
which major advantage?
A. It requires frequent INR monitoring.
B. It has a specific reversal agent available.
C. It does not require routine coagulation monitoring. [CORRECT]
D. It can be safely used in patients with mechanical heart valves.
Correct Answer: C
Rationale: Direct oral anticoagulants (DOACs) like apixaban have a predictable pharmacokinetic
profile and do not require routine INR or aPTT monitoring, which is a significant advantage over
warfarin. They are contraindicated in mechanical heart valves.
Q8: A patient taking diltiazem develops severe constipation. The nurse explains that this occurs
because diltiazem:
, 4
A. Increases gastric acid production.
B. Decreases smooth muscle contraction in the GI tract. [CORRECT]
C. Blocks dopamine receptors in the gut.
D. Increases water absorption in the large intestine.
Correct Answer: B
Rationale: Diltiazem is a non-dihydropyridine calcium channel blocker. By blocking calcium
entry into smooth muscle cells, it decreases the contractility of the GI tract, leading to
significantly delayed transit time and severe constipation.
Q9: A patient with heart failure is prescribed spironolactone. Which laboratory value requires the
nurse to hold the medication and notify the provider?
A. Sodium 135 mEq/L
B. Potassium 6.2 mEq/L [CORRECT]
C. Calcium 8.5 mg/dL
D. Magnesium 1.8 mEq/L
Correct Answer: B
Rationale: Spironolactone is a potassium-sparing diuretic. A potassium level of 6.2 mEq/L is
hyperkalemia, which puts the patient at risk for fatal cardiac dysrhythmias. The nurse must hold
the medication to prevent further potassium retention.
Q10: A patient is receiving IV furosemide for acute pulmonary edema. Which electrolyte
imbalance is the highest priority for the nurse to monitor?
A. Hypernatremia
B. Hypokalemia [CORRECT]
C. Hypercalcemia
D. Hypomagnesemia
Correct Answer: B
Rationale: Loop diuretics cause a profound loss of potassium. Hypokalemia is a high priority
because it can lead to lethal cardiac dysrhythmias, especially in patients with heart failure who
may also be taking digoxin.
