NCLEX-RN Hematologic System
Pharmacology Practice Questions
| 20 NGN-Style MCQs with Rationales |
Nursing Exam Prep
Question 1
Clinical Scenario
A 65-year-old male client is admitted with a deep vein thrombosis
(DVT) in the left lower extremity. The healthcare provider prescribes
a continuous intravenous infusion of unfractionated heparin. The
client’s baseline activated partial thromboplastin time (aPTT) is 30
seconds. After 6 hours of the infusion, the nurse reviews the client’s
laboratory results and notes the aPTT is 95 seconds. The therapeutic
range for aPTT is 1.5 to 2 times the control value (45–90 seconds).
Question Stem
Which action should the nurse take first?
Options
A. Increase the heparin infusion rate by 2 units/kg/hr.
B. Administer 10 mg of oral vitamin K immediately.
C. Pause the heparin infusion and notify the healthcare provider.
D. Continue the current infusion rate and recheck the aPTT in 6
hours.
,Correct Answer
Correct Answer: C. Pause the heparin infusion and notify the
healthcare provider.
Detailed Rationale
The correct action is to pause the heparin infusion and notify the
healthcare provider. An aPTT of 95 seconds exceeds the therapeutic
range (45–90 seconds), placing the client at a high risk for bleeding
complications. Standard high-alert medication protocols dictate
that when the aPTT is supratherapeutic, the infusion should be
paused or the rate decreased according to the facility’s
standardized heparin nomogram, and the provider must be notified.
Option A is incorrect because increasing the rate would further
elevate the aPTT and exacerbate bleeding risk. Option B is incorrect
because vitamin K is the antidote for warfarin, not heparin;
protamine sulfate is the antidote for heparin. Option D is incorrect
because continuing a supratherapeutic heparin infusion without
intervention is unsafe and violates medication safety protocols. The
nurse must act to prevent hemorrhage.
Learning Objective
Interpret aPTT laboratory values in relation to unfractionated heparin
therapy.
Prioritize nursing interventions for supratherapeutic anticoagulation
levels.
Apply facility-specific high-alert medication protocols for heparin
infusions.
,Medication Safety Focus
High-alert medication / Laboratory monitoring
Question 2
Clinical Scenario
A 72-year-old female client with a history of atrial fibrillation is being
discharged with a new prescription for warfarin. The nurse is
providing discharge education regarding dietary modifications and
lifestyle adjustments to ensure safe medication management.
Question Stem
Which statement by the client indicates an understanding of the
teaching?
Options
A. "I will increase my intake of spinach and kale to build my
strength."
B. "I will use a soft-bristled toothbrush and an electric razor."
C. "I will take ibuprofen for my occasional arthritis pain."
D. "I will stop taking the warfarin if I notice my gums bleeding
slightly."
Correct Answer
Correct Answer: B. "I will use a soft-bristled toothbrush and an
electric razor."
Detailed Rationale
The correct statement is B. Warfarin is an anticoagulant that
increases the risk of bleeding. Using a soft-bristled toothbrush and
an electric razor are essential safety measures to prevent minor
, trauma and subsequent bleeding.
Option A is incorrect because spinach and kale are high in vitamin K,
which antagonizes warfarin’s effects and can lead to subtherapeutic
INR levels and clot formation. Clients should maintain a consistent,
not increased, intake of vitamin K-rich foods. Option C is incorrect
because ibuprofen (an NSAID) increases the risk of gastrointestinal
bleeding and should be avoided; acetaminophen is the preferred
analgesic. Option D is incorrect because the client should never
independently stop or adjust the warfarin dose; any bleeding should
be reported to the healthcare provider for evaluation and potential
dosage adjustment.
Learning Objective
Identify lifestyle modifications to prevent bleeding in clients taking
anticoagulants.
Recognize drug-food interactions between warfarin and vitamin K-
rich foods.
Educate patients on safe over-the-counter medication choices
while on warfarin.
Medication Safety Focus
Patient education / Bleeding precaution
Question 3
Clinical Scenario
A 55-year-old male client is 1-day postoperative following a total hip
replacement. The healthcare provider prescribes enoxaparin 40 mg
Pharmacology Practice Questions
| 20 NGN-Style MCQs with Rationales |
Nursing Exam Prep
Question 1
Clinical Scenario
A 65-year-old male client is admitted with a deep vein thrombosis
(DVT) in the left lower extremity. The healthcare provider prescribes
a continuous intravenous infusion of unfractionated heparin. The
client’s baseline activated partial thromboplastin time (aPTT) is 30
seconds. After 6 hours of the infusion, the nurse reviews the client’s
laboratory results and notes the aPTT is 95 seconds. The therapeutic
range for aPTT is 1.5 to 2 times the control value (45–90 seconds).
Question Stem
Which action should the nurse take first?
Options
A. Increase the heparin infusion rate by 2 units/kg/hr.
B. Administer 10 mg of oral vitamin K immediately.
C. Pause the heparin infusion and notify the healthcare provider.
D. Continue the current infusion rate and recheck the aPTT in 6
hours.
,Correct Answer
Correct Answer: C. Pause the heparin infusion and notify the
healthcare provider.
Detailed Rationale
The correct action is to pause the heparin infusion and notify the
healthcare provider. An aPTT of 95 seconds exceeds the therapeutic
range (45–90 seconds), placing the client at a high risk for bleeding
complications. Standard high-alert medication protocols dictate
that when the aPTT is supratherapeutic, the infusion should be
paused or the rate decreased according to the facility’s
standardized heparin nomogram, and the provider must be notified.
Option A is incorrect because increasing the rate would further
elevate the aPTT and exacerbate bleeding risk. Option B is incorrect
because vitamin K is the antidote for warfarin, not heparin;
protamine sulfate is the antidote for heparin. Option D is incorrect
because continuing a supratherapeutic heparin infusion without
intervention is unsafe and violates medication safety protocols. The
nurse must act to prevent hemorrhage.
Learning Objective
Interpret aPTT laboratory values in relation to unfractionated heparin
therapy.
Prioritize nursing interventions for supratherapeutic anticoagulation
levels.
Apply facility-specific high-alert medication protocols for heparin
infusions.
,Medication Safety Focus
High-alert medication / Laboratory monitoring
Question 2
Clinical Scenario
A 72-year-old female client with a history of atrial fibrillation is being
discharged with a new prescription for warfarin. The nurse is
providing discharge education regarding dietary modifications and
lifestyle adjustments to ensure safe medication management.
Question Stem
Which statement by the client indicates an understanding of the
teaching?
Options
A. "I will increase my intake of spinach and kale to build my
strength."
B. "I will use a soft-bristled toothbrush and an electric razor."
C. "I will take ibuprofen for my occasional arthritis pain."
D. "I will stop taking the warfarin if I notice my gums bleeding
slightly."
Correct Answer
Correct Answer: B. "I will use a soft-bristled toothbrush and an
electric razor."
Detailed Rationale
The correct statement is B. Warfarin is an anticoagulant that
increases the risk of bleeding. Using a soft-bristled toothbrush and
an electric razor are essential safety measures to prevent minor
, trauma and subsequent bleeding.
Option A is incorrect because spinach and kale are high in vitamin K,
which antagonizes warfarin’s effects and can lead to subtherapeutic
INR levels and clot formation. Clients should maintain a consistent,
not increased, intake of vitamin K-rich foods. Option C is incorrect
because ibuprofen (an NSAID) increases the risk of gastrointestinal
bleeding and should be avoided; acetaminophen is the preferred
analgesic. Option D is incorrect because the client should never
independently stop or adjust the warfarin dose; any bleeding should
be reported to the healthcare provider for evaluation and potential
dosage adjustment.
Learning Objective
Identify lifestyle modifications to prevent bleeding in clients taking
anticoagulants.
Recognize drug-food interactions between warfarin and vitamin K-
rich foods.
Educate patients on safe over-the-counter medication choices
while on warfarin.
Medication Safety Focus
Patient education / Bleeding precaution
Question 3
Clinical Scenario
A 55-year-old male client is 1-day postoperative following a total hip
replacement. The healthcare provider prescribes enoxaparin 40 mg
