NCLEX PHARMACOLOGY QUESTION AND
ANSWERS BANK HIGH-YIELD EXPLANATIONS &
RATIONALES BUNDLE
Master your nursing boards with this premium question
pharmacology bank meticulously designed for NCLEX-RN
success. Each high-yield question features a direct answer
key and deep-dive rationales immediately after the items to
reinforce core drug classifications, therapeutic mechanisms,
and critical safety parameters. This ultimate study guide
mirrors exam formatting to transform complex medication
knowledge into top grades on test day.
1. A nurse is preparing to administer digoxin to a patient with
heart failure. Which of the following assessments is the
priority before administering this medication?
• A) Monitor the patient's blood pressure.
• B) Measure the patient's apical pulse for one full minute.
• C) Check the patient's serum potassium level.
• D) Weigh the patient to assess for fluid retention.
Answer: B
Rationale: Digoxin is a cardiac glycoside that decreases the
,heart rate. The nurse must assess the apical pulse for one
full minute prior to administration; the medication should be
withheld, and the provider notified, if the heart rate is less
than 60 beats per minute in an adult to prevent severe
bradycardia.
2. A patient is prescribed lisinopril for hypertension. Which
adverse effect should the nurse instruct the patient to report
immediately to the healthcare provider?
• A) A persistent, dry cough
• B) Swelling of the tongue or lips
• C) Mild dizziness when standing up
• D) Increased frequency of urination
Answer: B
Rationale: Swelling of the face, lips, tongue, or glottis
indicates angioedema, a life-threatening adverse effect of
ACE inhibitors like lisinopril. While a dry cough is a common
side effect, angioedema compromises the airway and
requires emergency intervention.
3. A nurse is caring for a patient receiving intravenous
heparin infusion for a deep vein thrombosis (DVT). Which
laboratory value should the nurse monitor to regulate the
heparin dosage?
• A) Prothrombin time (PT)
• B) International Normalized Ratio (INR)
• C) Activated partial thromboplastin time (aPTT)
• D) Platelet count
,Answer: C
Rationale: The aPTT is used to monitor the therapeutic
effectiveness of unfractionated heparin infusion. PT and INR
are utilized to monitor oral anticoagulant therapy, such as
warfarin.
4. A patient diagnosed with type 1 diabetes mellitus is
prescribed NPH insulin and regular insulin to be
administered injection-style at breakfast. Which action
should the nurse take when mixing these insulins in a single
syringe?
• A) Draw up the NPH insulin first, followed by the regular
insulin.
• B) Draw up the regular insulin first, followed by the NPH
insulin.
• C) Mix the insulins in separate syringes and inject them at
different sites.
• D) Shake the NPH vial vigorously before drawing up the
clear insulin.
Answer: B
Rationale: When mixing regular and NPH insulin, the clear
(regular) insulin must always be drawn into the syringe first
before the cloudy (NPH) insulin. This prevents contaminating
the short-acting insulin vial with intermediate-acting insulin.
5. A nurse is teaching a patient who has a new prescription
for atorvastatin to treat hypercholesterolemia. Which of the
following instructions should the nurse include?
, • A) Take the medication with grapefruit juice to enhance
absorption.
• B) Report any unexplained muscle pain or tenderness
immediately.
• C) Expect the medication to cause your stool to turn dark
black.
• D) Stop taking the medication as soon as cholesterol levels
normalize.
Answer: B
Rationale: Unexplained muscle pain, tenderness, or
weakness can be a sign of rhabdomyolysis, a rare but severe
adverse effect of statin medications that can lead to acute
kidney injury. Grapefruit juice must be avoided as it
increases statin toxicity risks.
6. A patient is receiving a continuous infusion of
vancomycin. The nurse schedules a trough level to be drawn.
When is the most appropriate time for the lab to collect this
blood sample?
• A) One hour after the infusion is completed
• B) Halfway through the infusion interval
• C) Immediately before administering the next dose
• D) Two hours prior to the next scheduled dose
Answer: C
Rationale: Trough levels represent the lowest concentration
of a drug in the bloodstream. They should be drawn
immediately prior to the administration of the next scheduled
ANSWERS BANK HIGH-YIELD EXPLANATIONS &
RATIONALES BUNDLE
Master your nursing boards with this premium question
pharmacology bank meticulously designed for NCLEX-RN
success. Each high-yield question features a direct answer
key and deep-dive rationales immediately after the items to
reinforce core drug classifications, therapeutic mechanisms,
and critical safety parameters. This ultimate study guide
mirrors exam formatting to transform complex medication
knowledge into top grades on test day.
1. A nurse is preparing to administer digoxin to a patient with
heart failure. Which of the following assessments is the
priority before administering this medication?
• A) Monitor the patient's blood pressure.
• B) Measure the patient's apical pulse for one full minute.
• C) Check the patient's serum potassium level.
• D) Weigh the patient to assess for fluid retention.
Answer: B
Rationale: Digoxin is a cardiac glycoside that decreases the
,heart rate. The nurse must assess the apical pulse for one
full minute prior to administration; the medication should be
withheld, and the provider notified, if the heart rate is less
than 60 beats per minute in an adult to prevent severe
bradycardia.
2. A patient is prescribed lisinopril for hypertension. Which
adverse effect should the nurse instruct the patient to report
immediately to the healthcare provider?
• A) A persistent, dry cough
• B) Swelling of the tongue or lips
• C) Mild dizziness when standing up
• D) Increased frequency of urination
Answer: B
Rationale: Swelling of the face, lips, tongue, or glottis
indicates angioedema, a life-threatening adverse effect of
ACE inhibitors like lisinopril. While a dry cough is a common
side effect, angioedema compromises the airway and
requires emergency intervention.
3. A nurse is caring for a patient receiving intravenous
heparin infusion for a deep vein thrombosis (DVT). Which
laboratory value should the nurse monitor to regulate the
heparin dosage?
• A) Prothrombin time (PT)
• B) International Normalized Ratio (INR)
• C) Activated partial thromboplastin time (aPTT)
• D) Platelet count
,Answer: C
Rationale: The aPTT is used to monitor the therapeutic
effectiveness of unfractionated heparin infusion. PT and INR
are utilized to monitor oral anticoagulant therapy, such as
warfarin.
4. A patient diagnosed with type 1 diabetes mellitus is
prescribed NPH insulin and regular insulin to be
administered injection-style at breakfast. Which action
should the nurse take when mixing these insulins in a single
syringe?
• A) Draw up the NPH insulin first, followed by the regular
insulin.
• B) Draw up the regular insulin first, followed by the NPH
insulin.
• C) Mix the insulins in separate syringes and inject them at
different sites.
• D) Shake the NPH vial vigorously before drawing up the
clear insulin.
Answer: B
Rationale: When mixing regular and NPH insulin, the clear
(regular) insulin must always be drawn into the syringe first
before the cloudy (NPH) insulin. This prevents contaminating
the short-acting insulin vial with intermediate-acting insulin.
5. A nurse is teaching a patient who has a new prescription
for atorvastatin to treat hypercholesterolemia. Which of the
following instructions should the nurse include?
, • A) Take the medication with grapefruit juice to enhance
absorption.
• B) Report any unexplained muscle pain or tenderness
immediately.
• C) Expect the medication to cause your stool to turn dark
black.
• D) Stop taking the medication as soon as cholesterol levels
normalize.
Answer: B
Rationale: Unexplained muscle pain, tenderness, or
weakness can be a sign of rhabdomyolysis, a rare but severe
adverse effect of statin medications that can lead to acute
kidney injury. Grapefruit juice must be avoided as it
increases statin toxicity risks.
6. A patient is receiving a continuous infusion of
vancomycin. The nurse schedules a trough level to be drawn.
When is the most appropriate time for the lab to collect this
blood sample?
• A) One hour after the infusion is completed
• B) Halfway through the infusion interval
• C) Immediately before administering the next dose
• D) Two hours prior to the next scheduled dose
Answer: C
Rationale: Trough levels represent the lowest concentration
of a drug in the bloodstream. They should be drawn
immediately prior to the administration of the next scheduled
