NR565 / Advanced Pharmacology Test Bank
2026/2027 New Update/ Questions, Answers
Elaborate Rationales/ Graded A+ Tested And
Verified
1. A 56-year-old male with hypertension is started on lisinopril. Two weeks later, he
develops a dry, persistent cough that disrupts sleep and daily activities. Which
alternative antihypertensive is most appropriate to manage his blood pressure without
causing the cough?
A. Amlodipine
B. Losartan
C. Hydrochlorothiazide
D. Atenolol
Rationale: ACE inhibitors such as lisinopril inhibit the breakdown of bradykinin,
leading to accumulation and irritation in the respiratory tract, which manifests as a dry
cough in up to 10% of patients. Angiotensin receptor blockers (ARBs) like losartan
provide effective blood pressure control by blocking the angiotensin II receptor
without affecting bradykinin metabolism, thus avoiding cough. Switching to an ARB
is the recommended first step before considering alternative classes
.
2. A patient taking warfarin presents with an INR of 5.2 but no signs of active bleeding.
What is the safest and most appropriate next step to prevent complications while
maintaining anticoagulation therapy?
A. Administer vitamin K 10 mg IV immediately
B. Continue current dose and recheck INR in one week
C. Hold warfarin temporarily and recheck INR in 24–48 hours
D. Administer fresh frozen plasma immediately
Rationale: A supratherapeutic INR without bleeding requires careful management to
prevent hemorrhagic complications. Temporarily holding warfarin allows the INR to
normalize naturally. Vitamin K or fresh frozen plasma is indicated only if the patient
develops significant bleeding or if the INR is extremely high (>10). Monitoring and
adjusting the next doses ensures continued safety without unnecessary intervention.
,3. A 70-year-old patient with heart failure and atrial fibrillation is prescribed digoxin.
Which symptom should prompt immediate evaluation for digoxin toxicity?
A. Muscle cramps
B. Constipation
C. Yellow-green visual halos
D. Increased appetite
Rationale: Digoxin has a narrow therapeutic index, and toxicity can present with
gastrointestinal, cardiac, and visual symptoms. Yellow-green halos, blurred vision,
and changes in color perception are classic early signs of toxicity, often associated
with elevated serum digoxin levels or electrolyte disturbances like hypokalemia.
Prompt evaluation and potential dose adjustment or discontinuation are critical to
prevent life-threatening arrhythmias.
4. Beta-blockers are contraindicated in which patient population due to risk of severe
complications?
A. Patient with stable angina
B. Patient with essential tremor
C. Patient with asthma
D. Patient with prior myocardial infarction
Rationale: Nonselective beta-blockers can precipitate bronchoconstriction by
blocking beta-2 adrenergic receptors in the lungs, which is dangerous in patients with
asthma or reactive airway disease. While cardioselective beta-blockers are safer, they
still carry some risk, making beta-blocker therapy generally contraindicated in
moderate to severe asthma.
5. A 65-year-old patient is prescribed amiodarone for atrial fibrillation. Which organ
system requires regular monitoring to prevent drug-induced complications?
A. Kidneys
B. Thyroid
C. Stomach
D. Adrenal glands
Rationale: Amiodarone is iodine-rich and can disrupt thyroid hormone synthesis and
metabolism, causing hypothyroidism or hyperthyroidism. Thyroid function tests
(TSH, free T4) should be monitored at baseline and periodically during therapy. Other
organ systems, including liver and lungs, also require monitoring due to the drug’s
potential for hepatotoxicity and pulmonary fibrosis.
,6. Which antihypertensive is considered safe and preferred during pregnancy for
managing chronic hypertension?
A. ACE inhibitor
B. ARB
C. Spironolactone
D. Methyldopa
Rationale: Methyldopa is considered safe in pregnancy due to its long history of use
and minimal fetal risk. ACE inhibitors and ARBs are teratogenic and can cause fetal
renal dysplasia, while spironolactone may have antiandrogenic effects. Labetalol is
another commonly used alternative.
7. What is the mechanism of action of thiazide diuretics in the kidney?
A. Inhibit sodium reabsorption in the loop of Henle
B. Inhibit sodium-chloride symporter in the distal convoluted tubule
C. Block aldosterone receptors
D. Increase glomerular filtration rate
Rationale: Thiazide diuretics act on the distal convoluted tubule to inhibit the sodium-
chloride symporter, promoting sodium and water excretion. This leads to reduced
blood volume and blood pressure. They also indirectly increase calcium reabsorption,
which can benefit patients with osteoporosis.
8. Which calcium channel blocker primarily decreases heart rate by acting on cardiac
nodal tissue rather than vascular smooth muscle?
A. Amlodipine
B. Nifedipine
C. Verapamil
D. Felodipine
Rationale: Verapamil (and diltiazem) selectively inhibit calcium influx in the SA and
AV nodes, slowing heart rate and conduction. Dihydropyridine calcium channel
blockers primarily act on vascular smooth muscle, causing vasodilation and reducing
blood pressure but have minimal effect on heart rate.
9. Which anticoagulant directly inhibits Factor Xa and is used to prevent
thromboembolic events?
A. Warfarin
B. Dabigatran
C. Rivaroxaban
D. Heparin
Rationale: Rivaroxaban is a direct oral anticoagulant that selectively inhibits Factor
Xa, preventing thrombin formation and clot development. Warfarin inhibits vitamin
K-dependent clotting factors, and dabigatran inhibits thrombin (Factor IIa), while
unfractionated heparin indirectly inhibits Factor Xa through antithrombin activation.
10. A patient with hypertension and chronic kidney disease should avoid which
medication due to risk of hyperkalemia?
, A. ACE inhibitor
B. Potassium-sparing diuretics
C. Calcium channel blockers
D. Beta-blockers
Rationale: Potassium-sparing diuretics (e.g., spironolactone, amiloride) reduce
potassium excretion. In CKD, the kidneys are already impaired, significantly
increasing the risk of hyperkalemia, which can lead to cardiac arrhythmias. ACE
inhibitors also raise potassium but may be used with careful monitoring due to renal-
protective effects.
11. Which of the following is a well-known adverse effect of statins that requires
monitoring of patient symptoms and laboratory tests?
A. Hyperglycemia
B. Constipation
C. Myopathy
D. Cough
Rationale: Statins inhibit HMG-CoA reductase, reducing cholesterol synthesis but can
disrupt muscle metabolism, causing myalgia, weakness, and in rare cases
rhabdomyolysis. Creatine kinase should be monitored if patients report significant
muscle pain or weakness.
12. The first-line treatment for hypertensive emergency requiring rapid blood pressure
control is:
A. Oral lisinopril
B. Clonidine
C. IV nitroprusside
D. Hydrochlorothiazide
Rationale: Hypertensive emergencies necessitate immediate reduction of blood
pressure to prevent end-organ damage. Intravenous agents such as nitroprusside act
quickly and can be titrated, unlike oral agents which act too slowly to prevent acute
complications.
13. Which electrolyte imbalance is most commonly caused by loop diuretics such as
furosemide?
A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hyponatremia only
Rationale: Loop diuretics inhibit sodium-potassium-chloride transport in the thick
ascending loop of Henle, causing excessive urinary potassium loss, which can lead to
hypokalemia. Clinical signs include muscle cramps, weakness, and potential cardiac
arrhythmias. Sodium and magnesium may also be depleted.
2026/2027 New Update/ Questions, Answers
Elaborate Rationales/ Graded A+ Tested And
Verified
1. A 56-year-old male with hypertension is started on lisinopril. Two weeks later, he
develops a dry, persistent cough that disrupts sleep and daily activities. Which
alternative antihypertensive is most appropriate to manage his blood pressure without
causing the cough?
A. Amlodipine
B. Losartan
C. Hydrochlorothiazide
D. Atenolol
Rationale: ACE inhibitors such as lisinopril inhibit the breakdown of bradykinin,
leading to accumulation and irritation in the respiratory tract, which manifests as a dry
cough in up to 10% of patients. Angiotensin receptor blockers (ARBs) like losartan
provide effective blood pressure control by blocking the angiotensin II receptor
without affecting bradykinin metabolism, thus avoiding cough. Switching to an ARB
is the recommended first step before considering alternative classes
.
2. A patient taking warfarin presents with an INR of 5.2 but no signs of active bleeding.
What is the safest and most appropriate next step to prevent complications while
maintaining anticoagulation therapy?
A. Administer vitamin K 10 mg IV immediately
B. Continue current dose and recheck INR in one week
C. Hold warfarin temporarily and recheck INR in 24–48 hours
D. Administer fresh frozen plasma immediately
Rationale: A supratherapeutic INR without bleeding requires careful management to
prevent hemorrhagic complications. Temporarily holding warfarin allows the INR to
normalize naturally. Vitamin K or fresh frozen plasma is indicated only if the patient
develops significant bleeding or if the INR is extremely high (>10). Monitoring and
adjusting the next doses ensures continued safety without unnecessary intervention.
,3. A 70-year-old patient with heart failure and atrial fibrillation is prescribed digoxin.
Which symptom should prompt immediate evaluation for digoxin toxicity?
A. Muscle cramps
B. Constipation
C. Yellow-green visual halos
D. Increased appetite
Rationale: Digoxin has a narrow therapeutic index, and toxicity can present with
gastrointestinal, cardiac, and visual symptoms. Yellow-green halos, blurred vision,
and changes in color perception are classic early signs of toxicity, often associated
with elevated serum digoxin levels or electrolyte disturbances like hypokalemia.
Prompt evaluation and potential dose adjustment or discontinuation are critical to
prevent life-threatening arrhythmias.
4. Beta-blockers are contraindicated in which patient population due to risk of severe
complications?
A. Patient with stable angina
B. Patient with essential tremor
C. Patient with asthma
D. Patient with prior myocardial infarction
Rationale: Nonselective beta-blockers can precipitate bronchoconstriction by
blocking beta-2 adrenergic receptors in the lungs, which is dangerous in patients with
asthma or reactive airway disease. While cardioselective beta-blockers are safer, they
still carry some risk, making beta-blocker therapy generally contraindicated in
moderate to severe asthma.
5. A 65-year-old patient is prescribed amiodarone for atrial fibrillation. Which organ
system requires regular monitoring to prevent drug-induced complications?
A. Kidneys
B. Thyroid
C. Stomach
D. Adrenal glands
Rationale: Amiodarone is iodine-rich and can disrupt thyroid hormone synthesis and
metabolism, causing hypothyroidism or hyperthyroidism. Thyroid function tests
(TSH, free T4) should be monitored at baseline and periodically during therapy. Other
organ systems, including liver and lungs, also require monitoring due to the drug’s
potential for hepatotoxicity and pulmonary fibrosis.
,6. Which antihypertensive is considered safe and preferred during pregnancy for
managing chronic hypertension?
A. ACE inhibitor
B. ARB
C. Spironolactone
D. Methyldopa
Rationale: Methyldopa is considered safe in pregnancy due to its long history of use
and minimal fetal risk. ACE inhibitors and ARBs are teratogenic and can cause fetal
renal dysplasia, while spironolactone may have antiandrogenic effects. Labetalol is
another commonly used alternative.
7. What is the mechanism of action of thiazide diuretics in the kidney?
A. Inhibit sodium reabsorption in the loop of Henle
B. Inhibit sodium-chloride symporter in the distal convoluted tubule
C. Block aldosterone receptors
D. Increase glomerular filtration rate
Rationale: Thiazide diuretics act on the distal convoluted tubule to inhibit the sodium-
chloride symporter, promoting sodium and water excretion. This leads to reduced
blood volume and blood pressure. They also indirectly increase calcium reabsorption,
which can benefit patients with osteoporosis.
8. Which calcium channel blocker primarily decreases heart rate by acting on cardiac
nodal tissue rather than vascular smooth muscle?
A. Amlodipine
B. Nifedipine
C. Verapamil
D. Felodipine
Rationale: Verapamil (and diltiazem) selectively inhibit calcium influx in the SA and
AV nodes, slowing heart rate and conduction. Dihydropyridine calcium channel
blockers primarily act on vascular smooth muscle, causing vasodilation and reducing
blood pressure but have minimal effect on heart rate.
9. Which anticoagulant directly inhibits Factor Xa and is used to prevent
thromboembolic events?
A. Warfarin
B. Dabigatran
C. Rivaroxaban
D. Heparin
Rationale: Rivaroxaban is a direct oral anticoagulant that selectively inhibits Factor
Xa, preventing thrombin formation and clot development. Warfarin inhibits vitamin
K-dependent clotting factors, and dabigatran inhibits thrombin (Factor IIa), while
unfractionated heparin indirectly inhibits Factor Xa through antithrombin activation.
10. A patient with hypertension and chronic kidney disease should avoid which
medication due to risk of hyperkalemia?
, A. ACE inhibitor
B. Potassium-sparing diuretics
C. Calcium channel blockers
D. Beta-blockers
Rationale: Potassium-sparing diuretics (e.g., spironolactone, amiloride) reduce
potassium excretion. In CKD, the kidneys are already impaired, significantly
increasing the risk of hyperkalemia, which can lead to cardiac arrhythmias. ACE
inhibitors also raise potassium but may be used with careful monitoring due to renal-
protective effects.
11. Which of the following is a well-known adverse effect of statins that requires
monitoring of patient symptoms and laboratory tests?
A. Hyperglycemia
B. Constipation
C. Myopathy
D. Cough
Rationale: Statins inhibit HMG-CoA reductase, reducing cholesterol synthesis but can
disrupt muscle metabolism, causing myalgia, weakness, and in rare cases
rhabdomyolysis. Creatine kinase should be monitored if patients report significant
muscle pain or weakness.
12. The first-line treatment for hypertensive emergency requiring rapid blood pressure
control is:
A. Oral lisinopril
B. Clonidine
C. IV nitroprusside
D. Hydrochlorothiazide
Rationale: Hypertensive emergencies necessitate immediate reduction of blood
pressure to prevent end-organ damage. Intravenous agents such as nitroprusside act
quickly and can be titrated, unlike oral agents which act too slowly to prevent acute
complications.
13. Which electrolyte imbalance is most commonly caused by loop diuretics such as
furosemide?
A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hyponatremia only
Rationale: Loop diuretics inhibit sodium-potassium-chloride transport in the thick
ascending loop of Henle, causing excessive urinary potassium loss, which can lead to
hypokalemia. Clinical signs include muscle cramps, weakness, and potential cardiac
arrhythmias. Sodium and magnesium may also be depleted.
