NCLEX-PN PHARMACOLOGY EXAM
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
Core Domains
Pharmacokinetics and Pharmacodynamics
Medication Administration and Safety
Cardiovascular and Hematologic Pharmacology
Endocrine Pharmacology
Central Nervous System Pharmacology
Anti-Infective Pharmacology
Gastrointestinal and Renal Pharmacology
Respiratory and Autonomic Nervous System Pharmacology
Pain Management and Anti-Inflammatory Agents
High-Alert Medications and Emergency Pharmacology
Introduction
The NCLEX-PN Pharmacology Examination evaluates the practical nursing
candidate's mastery of pharmacologic principles essential for safe and effective
clinical practice. The assessment measures knowledge of drug classifications,
mechanisms of action, therapeutic uses, adverse effects, and nursing interventions
across the lifespan. Content emphasizes medication administration safety, dosage
calculations, high-alert medications, patient monitoring, and emergency
pharmacologic interventions. This comprehensive test bank challenges the
candidate to apply pharmacokinetic and pharmacodynamic principles, identify
adverse drug reactions, implement safe medication practices, and prioritize
nursing interventions in diverse clinical scenarios, preparing for success on the
NCLEX-PN licensure examination.
,SECTION ONE: QUESTIONS 1–100
1. A nurse is preparing to administer furosemide to a client with heart failure.
Which assessment finding should the nurse prioritize before administration?
A. Serum potassium level of 3.2 mEq/L
B. Blood pressure of 148/92 mm Hg
C. Heart rate of 88 beats per minute
D. Respiratory rate of 18 breaths per minute
A. Serum potassium level of 3.2 mEq/L
RATIONALE: Furosemide is a loop diuretic that causes potassium excretion,
increasing the risk for hypokalemia. A serum potassium level of 3.2 mEq/L is
below the normal range (3.5–5.0 mEq/L) and requires intervention before
administering additional potassium-wasting medication to prevent cardiac
dysrhythmias and muscle weakness.
2. A client receiving warfarin therapy has an INR of 5.2. Which medication
should the nurse anticipate administering as prescribed?
A. Vitamin K
B. Protamine sulfate
C. Fresh frozen plasma
D. Aspirin
A. Vitamin K
RATIONALE: An INR of 5.2 is significantly above the therapeutic range of
2.0–3.0 for most conditions, indicating excessive anticoagulation and high
bleeding risk. Vitamin K is the specific antidote for warfarin reversal. Protamine
sulfate reverses heparin, fresh frozen plasma is reserved for life-threatening
bleeding, and aspirin would increase bleeding risk.
3. The nurse is teaching a client about levodopa-carbidopa for Parkinson
disease. Which statement by the client indicates understanding of the
medication teaching?
,A. "I should take this medication with a high-protein meal to improve absorption."
B. "I may experience darkening of my urine, which is a harmless side effect."
C. "I can stop taking this medication once my tremors improve."
D. "I should avoid foods containing tyramine while taking this medication."
B. "I may experience darkening of my urine, which is a harmless side effect."
RATIONALE: Levodopa-carbidopa metabolism can cause darkening of urine,
sweat, and saliva, which is benign and expected. High-protein meals interfere with
levodopa absorption, the medication must never be abruptly discontinued due to
risk of parkinsonian crisis, and tyramine restrictions apply to MAO inhibitors, not
levodopa-carbidopa.
4. A nurse is administering insulin glargine to a client with type 1 diabetes.
Which action by the nurse is appropriate?
A. Mix insulin glargine with regular insulin in the same syringe
B. Administer the medication subcutaneously at the same time each day
C. Shake the vial vigorously before drawing up the dose
D. Administer the medication intravenously for rapid onset
B. Administer the medication subcutaneously at the same time each day
RATIONALE: Insulin glargine is a long-acting basal insulin that must be
administered subcutaneously at the same time daily to maintain consistent blood
glucose control. It should never be mixed with other insulins, does not require
vigorous shaking, and must not be administered intravenously.
5. A nurse is preparing to administer a medication that has a narrow
therapeutic index. Which action is most important?
A. Administer the medication with food
B. Monitor serum medication levels as prescribed
C. Give the medication at bedtime
D. Encourage increased fluid intake
B. Monitor serum medication levels as prescribed
, RATIONALE: Medications with a narrow therapeutic index have a small
difference between therapeutic and toxic concentrations. Monitoring serum levels
helps ensure that the medication remains within the desired therapeutic range and
reduces the risk of toxicity.
6. A client asks why a medication prescribed twice daily must be taken
approximately 12 hours apart. Which response should the nurse provide?
A. "This prevents all adverse effects."
B. "This maintains a more consistent therapeutic drug concentration."
C. "This guarantees that the medication will be completely absorbed."
D. "This prevents the medication from being metabolized."
B. "This maintains a more consistent therapeutic drug concentration."
RATIONALE: Scheduled dosing helps maintain therapeutic concentrations in
the bloodstream. Consistent intervals are especially important for medications with
relatively short half-lives.
7. Which organ is primarily responsible for metabolizing most medications?
A. Heart
B. Liver
C. Spleen
D. Pancreas
B. Liver
RATIONALE: The liver is the major site of drug metabolism. Hepatic
enzymes chemically modify many medications so they can eventually be
eliminated from the body.
8. A nurse is caring for an older adult who takes several medications. Which
physiological change increases the risk of medication toxicity?
A. Increased total body water
B. Increased hepatic metabolism
C. Decreased renal clearance
D. Increased serum albumin
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF.
Core Domains
Pharmacokinetics and Pharmacodynamics
Medication Administration and Safety
Cardiovascular and Hematologic Pharmacology
Endocrine Pharmacology
Central Nervous System Pharmacology
Anti-Infective Pharmacology
Gastrointestinal and Renal Pharmacology
Respiratory and Autonomic Nervous System Pharmacology
Pain Management and Anti-Inflammatory Agents
High-Alert Medications and Emergency Pharmacology
Introduction
The NCLEX-PN Pharmacology Examination evaluates the practical nursing
candidate's mastery of pharmacologic principles essential for safe and effective
clinical practice. The assessment measures knowledge of drug classifications,
mechanisms of action, therapeutic uses, adverse effects, and nursing interventions
across the lifespan. Content emphasizes medication administration safety, dosage
calculations, high-alert medications, patient monitoring, and emergency
pharmacologic interventions. This comprehensive test bank challenges the
candidate to apply pharmacokinetic and pharmacodynamic principles, identify
adverse drug reactions, implement safe medication practices, and prioritize
nursing interventions in diverse clinical scenarios, preparing for success on the
NCLEX-PN licensure examination.
,SECTION ONE: QUESTIONS 1–100
1. A nurse is preparing to administer furosemide to a client with heart failure.
Which assessment finding should the nurse prioritize before administration?
A. Serum potassium level of 3.2 mEq/L
B. Blood pressure of 148/92 mm Hg
C. Heart rate of 88 beats per minute
D. Respiratory rate of 18 breaths per minute
A. Serum potassium level of 3.2 mEq/L
RATIONALE: Furosemide is a loop diuretic that causes potassium excretion,
increasing the risk for hypokalemia. A serum potassium level of 3.2 mEq/L is
below the normal range (3.5–5.0 mEq/L) and requires intervention before
administering additional potassium-wasting medication to prevent cardiac
dysrhythmias and muscle weakness.
2. A client receiving warfarin therapy has an INR of 5.2. Which medication
should the nurse anticipate administering as prescribed?
A. Vitamin K
B. Protamine sulfate
C. Fresh frozen plasma
D. Aspirin
A. Vitamin K
RATIONALE: An INR of 5.2 is significantly above the therapeutic range of
2.0–3.0 for most conditions, indicating excessive anticoagulation and high
bleeding risk. Vitamin K is the specific antidote for warfarin reversal. Protamine
sulfate reverses heparin, fresh frozen plasma is reserved for life-threatening
bleeding, and aspirin would increase bleeding risk.
3. The nurse is teaching a client about levodopa-carbidopa for Parkinson
disease. Which statement by the client indicates understanding of the
medication teaching?
,A. "I should take this medication with a high-protein meal to improve absorption."
B. "I may experience darkening of my urine, which is a harmless side effect."
C. "I can stop taking this medication once my tremors improve."
D. "I should avoid foods containing tyramine while taking this medication."
B. "I may experience darkening of my urine, which is a harmless side effect."
RATIONALE: Levodopa-carbidopa metabolism can cause darkening of urine,
sweat, and saliva, which is benign and expected. High-protein meals interfere with
levodopa absorption, the medication must never be abruptly discontinued due to
risk of parkinsonian crisis, and tyramine restrictions apply to MAO inhibitors, not
levodopa-carbidopa.
4. A nurse is administering insulin glargine to a client with type 1 diabetes.
Which action by the nurse is appropriate?
A. Mix insulin glargine with regular insulin in the same syringe
B. Administer the medication subcutaneously at the same time each day
C. Shake the vial vigorously before drawing up the dose
D. Administer the medication intravenously for rapid onset
B. Administer the medication subcutaneously at the same time each day
RATIONALE: Insulin glargine is a long-acting basal insulin that must be
administered subcutaneously at the same time daily to maintain consistent blood
glucose control. It should never be mixed with other insulins, does not require
vigorous shaking, and must not be administered intravenously.
5. A nurse is preparing to administer a medication that has a narrow
therapeutic index. Which action is most important?
A. Administer the medication with food
B. Monitor serum medication levels as prescribed
C. Give the medication at bedtime
D. Encourage increased fluid intake
B. Monitor serum medication levels as prescribed
, RATIONALE: Medications with a narrow therapeutic index have a small
difference between therapeutic and toxic concentrations. Monitoring serum levels
helps ensure that the medication remains within the desired therapeutic range and
reduces the risk of toxicity.
6. A client asks why a medication prescribed twice daily must be taken
approximately 12 hours apart. Which response should the nurse provide?
A. "This prevents all adverse effects."
B. "This maintains a more consistent therapeutic drug concentration."
C. "This guarantees that the medication will be completely absorbed."
D. "This prevents the medication from being metabolized."
B. "This maintains a more consistent therapeutic drug concentration."
RATIONALE: Scheduled dosing helps maintain therapeutic concentrations in
the bloodstream. Consistent intervals are especially important for medications with
relatively short half-lives.
7. Which organ is primarily responsible for metabolizing most medications?
A. Heart
B. Liver
C. Spleen
D. Pancreas
B. Liver
RATIONALE: The liver is the major site of drug metabolism. Hepatic
enzymes chemically modify many medications so they can eventually be
eliminated from the body.
8. A nurse is caring for an older adult who takes several medications. Which
physiological change increases the risk of medication toxicity?
A. Increased total body water
B. Increased hepatic metabolism
C. Decreased renal clearance
D. Increased serum albumin
