NU 641 Advanced Clinical Pharmacology Final Exam Questions and
Answers and Explanations | Latest - Regis
1. What is the primary mechanism of action for ACE inhibitors in the treatment
of hypertension?
A. Directly antagonizing the AT1 receptor
B. Blocking the conversion of Angiotensin I to Angiotensin II
C. Inhibiting the release of renin from the kidneys
D. Increasing the excretion of sodium in the distal tubule
Answer: B
Explanation: ACE inhibitors block the Angiotensin-Converting Enzyme, preventing the
conversion of Angiotensin I to the potent vasoconstrictor Angiotensin II.
2. Which of the following side effects is most uniquely associated with the use
of ACE inhibitors compared to ARBs?
A. Hyperkalemia
B. Dry, hacking cough
C. Angioedema
D. Renal insufficiency
Answer: B
,Explanation: The dry cough associated with ACE inhibitors is caused by the accumulation
of bradykinin in the lungs; ARBs do not affect bradykinin levels.
3. A patient is started on Vancomycin IV for a MRSA infection. During the
infusion, the patient develops flushing and a rash on the neck and upper torso.
What is the most likely cause?
A. Red Man Syndrome due to rapid infusion
B. Pseudomembranous colitis
C. An IgE-mediated anaphylactic reaction
D. Stevens-Johnson Syndrome
Answer: A
Explanation: Red Man Syndrome is a rate-dependent infusion reaction caused by the
direct release of histamine from mast cells, not a true allergy.
4. Which laboratory value must be monitored closely in a patient taking
Spironolactone?
A. Serum Potassium
B. Serum Sodium
C. Serum Calcium
D. Serum Magnesium
Answer: A
,Explanation: Spironolactone is a potassium-sparing diuretic that can lead to life-
threatening hyperkalemia, especially in patients with renal impairment.
5. A patient with Type 2 Diabetes is scheduled for a CT scan with IV contrast.
Which medication should be held for 48 hours after the procedure?
A. Glipizide
B. Pioglitazone
C. Sitagliptin
D. Metformin
Answer: D
Explanation: Metformin should be held to avoid the risk of lactic acidosis if the contrast
media causes acute renal failure.
6. What is the mechanism of action of Warfarin?
A. Directly inhibiting Factor Xa
B. Directly inhibiting Thrombin
C. Inhibiting platelet aggregation via ADP receptors
D. Inhibiting the synthesis of Vitamin K-dependent clotting factors
Answer: D
Explanation: Warfarin inhibits the enzyme Vitamin K epoxide reductase, which is
necessary for the synthesis of factors II, VII, IX, and X.
, 7. Which medication is considered the first-line treatment for a patient with
hypothyroidism?
A. Liothyronine
B. Methimazole
C. Propylthiouracil
D. Levothyroxine
Answer: D
Explanation: Levothyroxine (T4) is the standard replacement therapy for hypothyroidism
due to its long half-life and consistent potency.
8. When prescribing Sildenafil for erectile dysfunction, which medication class is
strictly contraindicated?
A. Beta-blockers
B. Statins
C. Nitrates
D. Proton pump inhibitors
Answer: C
Explanation: Nitrates cause an increase in cGMP; when combined with a PDE5 inhibitor
like Sildenafil, this can lead to profound, life-threatening hypotension.
Answers and Explanations | Latest - Regis
1. What is the primary mechanism of action for ACE inhibitors in the treatment
of hypertension?
A. Directly antagonizing the AT1 receptor
B. Blocking the conversion of Angiotensin I to Angiotensin II
C. Inhibiting the release of renin from the kidneys
D. Increasing the excretion of sodium in the distal tubule
Answer: B
Explanation: ACE inhibitors block the Angiotensin-Converting Enzyme, preventing the
conversion of Angiotensin I to the potent vasoconstrictor Angiotensin II.
2. Which of the following side effects is most uniquely associated with the use
of ACE inhibitors compared to ARBs?
A. Hyperkalemia
B. Dry, hacking cough
C. Angioedema
D. Renal insufficiency
Answer: B
,Explanation: The dry cough associated with ACE inhibitors is caused by the accumulation
of bradykinin in the lungs; ARBs do not affect bradykinin levels.
3. A patient is started on Vancomycin IV for a MRSA infection. During the
infusion, the patient develops flushing and a rash on the neck and upper torso.
What is the most likely cause?
A. Red Man Syndrome due to rapid infusion
B. Pseudomembranous colitis
C. An IgE-mediated anaphylactic reaction
D. Stevens-Johnson Syndrome
Answer: A
Explanation: Red Man Syndrome is a rate-dependent infusion reaction caused by the
direct release of histamine from mast cells, not a true allergy.
4. Which laboratory value must be monitored closely in a patient taking
Spironolactone?
A. Serum Potassium
B. Serum Sodium
C. Serum Calcium
D. Serum Magnesium
Answer: A
,Explanation: Spironolactone is a potassium-sparing diuretic that can lead to life-
threatening hyperkalemia, especially in patients with renal impairment.
5. A patient with Type 2 Diabetes is scheduled for a CT scan with IV contrast.
Which medication should be held for 48 hours after the procedure?
A. Glipizide
B. Pioglitazone
C. Sitagliptin
D. Metformin
Answer: D
Explanation: Metformin should be held to avoid the risk of lactic acidosis if the contrast
media causes acute renal failure.
6. What is the mechanism of action of Warfarin?
A. Directly inhibiting Factor Xa
B. Directly inhibiting Thrombin
C. Inhibiting platelet aggregation via ADP receptors
D. Inhibiting the synthesis of Vitamin K-dependent clotting factors
Answer: D
Explanation: Warfarin inhibits the enzyme Vitamin K epoxide reductase, which is
necessary for the synthesis of factors II, VII, IX, and X.
, 7. Which medication is considered the first-line treatment for a patient with
hypothyroidism?
A. Liothyronine
B. Methimazole
C. Propylthiouracil
D. Levothyroxine
Answer: D
Explanation: Levothyroxine (T4) is the standard replacement therapy for hypothyroidism
due to its long half-life and consistent potency.
8. When prescribing Sildenafil for erectile dysfunction, which medication class is
strictly contraindicated?
A. Beta-blockers
B. Statins
C. Nitrates
D. Proton pump inhibitors
Answer: C
Explanation: Nitrates cause an increase in cGMP; when combined with a PDE5 inhibitor
like Sildenafil, this can lead to profound, life-threatening hypotension.
