1
NU 518 MODULE 5 EXAM 2026/2027 |
ADVANCED PHARMACOLOGY | 40 VERIFIED
Q&A | DETAILED RATIONALES | NGN-
ALIGNED | PASS GUARANTEED – A+ GRADED
SECTION 1: HEMATOLOGIC PHARMACOLOGY - Questions 1-10
Q1: Heparin-Induced Thrombocytopenia
The student is reviewing hematologic medications. A patient receiving unfractionated heparin
develops a sudden drop in platelet count. What is the most likely diagnosis?
A. Heparin-induced thrombocytopenia (HIT)
B. Idiopathic thrombocytopenic purpura (ITP)
C. Disseminated intravascular coagulation (DIC)
D. Aplastic anemia
Correct Answer: A
Rationale: Heparin-induced thrombocytopenia (HIT) is a serious immune-mediated reaction to
heparin that causes a sudden drop in platelet count (typically >50% from baseline) and paradoxically
increases the risk of thrombosis. It is caused by antibodies against the heparin-platelet factor 4
complex. Heparin must be stopped immediately, and an alternative anticoagulant (e.g., argatroban,
bivalirudin) should be started. [100% CORRECT]
Q2: Argatroban Mechanism
The student is reviewing direct thrombin inhibitors. What is the mechanism of action of argatroban?
A. Direct thrombin inhibitor
B. Factor Xa inhibitor
C. Platelet glycoprotein IIb/IIIa inhibitor
D. Vitamin K antagonist
Correct Answer: A
Rationale: Argatroban is a direct thrombin inhibitor that binds reversibly to the active site of
thrombin, preventing fibrin formation. It is used for HIT and percutaneous coronary intervention in
patients with HIT. It is hepatically cleared and monitored by aPTT. [100% CORRECT]
Q3: Fondaparinux Mechanism
The student is reviewing anticoagulants. What is the mechanism of action of fondaparinux?
, 2
A. Selective factor Xa inhibitor via antithrombin III
B. Direct thrombin inhibitor
C. Vitamin K antagonist
D. Platelet P2Y12 inhibitor
Correct Answer: A
Rationale: Fondaparinux is a synthetic pentasaccharide that binds to antithrombin III and selectively
inhibits factor Xa. It is used for prophylaxis and treatment of venous thromboembolism. It does not
cause HIT. [100% CORRECT]
Q4: Dabigatran Reversal
The student is reviewing anticoagulant reversal. What is the specific reversal agent for dabigatran?
A. Idarucizumab
B. Andexanet alfa
C. Protamine sulfate
D. Vitamin K
Correct Answer: A
Rationale: Idarucizumab is a monoclonal antibody fragment that binds to dabigatran and reverses its
anticoagulant effect. Andexanet alfa reverses factor Xa inhibitors. Protamine sulfate reverses
heparin. Vitamin K reverses warfarin. [100% CORRECT]
Q5: Rivaroxaban Monitoring
The student is reviewing direct oral anticoagulants. Which laboratory test is used to monitor
rivaroxaban if needed?
A. Anti-Xa level
B. INR
C. aPTT
D. Bleeding time
Correct Answer: A
Rationale: Rivaroxaban is a factor Xa inhibitor. While routine monitoring is not required, anti-Xa
levels can be used to assess its anticoagulant effect in special situations (e.g., renal impairment,
overdose, bleeding). INR and aPTT are not reliable for rivaroxaban. [100% CORRECT]
Q6: Aspirin Mechanism
The student is reviewing antiplatelet medications. What is the mechanism of action of aspirin?
A. Irreversible inhibition of cyclooxygenase-1
B. Reversible inhibition of cyclooxygenase-2
C. P2Y12 receptor antagonist
D. Glycoprotein IIb/IIIa inhibitor
NU 518 MODULE 5 EXAM 2026/2027 |
ADVANCED PHARMACOLOGY | 40 VERIFIED
Q&A | DETAILED RATIONALES | NGN-
ALIGNED | PASS GUARANTEED – A+ GRADED
SECTION 1: HEMATOLOGIC PHARMACOLOGY - Questions 1-10
Q1: Heparin-Induced Thrombocytopenia
The student is reviewing hematologic medications. A patient receiving unfractionated heparin
develops a sudden drop in platelet count. What is the most likely diagnosis?
A. Heparin-induced thrombocytopenia (HIT)
B. Idiopathic thrombocytopenic purpura (ITP)
C. Disseminated intravascular coagulation (DIC)
D. Aplastic anemia
Correct Answer: A
Rationale: Heparin-induced thrombocytopenia (HIT) is a serious immune-mediated reaction to
heparin that causes a sudden drop in platelet count (typically >50% from baseline) and paradoxically
increases the risk of thrombosis. It is caused by antibodies against the heparin-platelet factor 4
complex. Heparin must be stopped immediately, and an alternative anticoagulant (e.g., argatroban,
bivalirudin) should be started. [100% CORRECT]
Q2: Argatroban Mechanism
The student is reviewing direct thrombin inhibitors. What is the mechanism of action of argatroban?
A. Direct thrombin inhibitor
B. Factor Xa inhibitor
C. Platelet glycoprotein IIb/IIIa inhibitor
D. Vitamin K antagonist
Correct Answer: A
Rationale: Argatroban is a direct thrombin inhibitor that binds reversibly to the active site of
thrombin, preventing fibrin formation. It is used for HIT and percutaneous coronary intervention in
patients with HIT. It is hepatically cleared and monitored by aPTT. [100% CORRECT]
Q3: Fondaparinux Mechanism
The student is reviewing anticoagulants. What is the mechanism of action of fondaparinux?
, 2
A. Selective factor Xa inhibitor via antithrombin III
B. Direct thrombin inhibitor
C. Vitamin K antagonist
D. Platelet P2Y12 inhibitor
Correct Answer: A
Rationale: Fondaparinux is a synthetic pentasaccharide that binds to antithrombin III and selectively
inhibits factor Xa. It is used for prophylaxis and treatment of venous thromboembolism. It does not
cause HIT. [100% CORRECT]
Q4: Dabigatran Reversal
The student is reviewing anticoagulant reversal. What is the specific reversal agent for dabigatran?
A. Idarucizumab
B. Andexanet alfa
C. Protamine sulfate
D. Vitamin K
Correct Answer: A
Rationale: Idarucizumab is a monoclonal antibody fragment that binds to dabigatran and reverses its
anticoagulant effect. Andexanet alfa reverses factor Xa inhibitors. Protamine sulfate reverses
heparin. Vitamin K reverses warfarin. [100% CORRECT]
Q5: Rivaroxaban Monitoring
The student is reviewing direct oral anticoagulants. Which laboratory test is used to monitor
rivaroxaban if needed?
A. Anti-Xa level
B. INR
C. aPTT
D. Bleeding time
Correct Answer: A
Rationale: Rivaroxaban is a factor Xa inhibitor. While routine monitoring is not required, anti-Xa
levels can be used to assess its anticoagulant effect in special situations (e.g., renal impairment,
overdose, bleeding). INR and aPTT are not reliable for rivaroxaban. [100% CORRECT]
Q6: Aspirin Mechanism
The student is reviewing antiplatelet medications. What is the mechanism of action of aspirin?
A. Irreversible inhibition of cyclooxygenase-1
B. Reversible inhibition of cyclooxygenase-2
C. P2Y12 receptor antagonist
D. Glycoprotein IIb/IIIa inhibitor
