2026/2027
Geneva College NURS 251
Pharmacology Module 9 Complete
Exam Review, Practice Assessments,
and Study Companion 2026/2027
Version
Question 1:
A patient receiving transdermal nitroglycerin therapy for chronic angina is instructed
to remove the patch for several hours each day. What is the primary reason for
implementing a nitrate-free period every 24 hours?
A. To prevent rebound hypertension
B. To reduce the risk of orthostatic hypotension
C. To inhibit the development of nitrate tolerance
D. To improve renal clearance of the medication
Correct Answer: C. To inhibit the development of nitrate tolerance
Rationale: Nitroglycerin therapy requires a daily nitrate-free interval because
continuous exposure to nitrates leads to pharmacologic tolerance, reducing the drug’s
effectiveness in relieving angina. By removing the patch or withholding the
medication for several hours each day, the body’s responsiveness to nitrates is
restored. Option A is incorrect because rebound hypertension is not the primary
concern. Option B may occur with nitrates but is not the reason for the nitrate-free
period. Option D is incorrect because nitroglycerin is metabolized primarily by the
liver rather than cleared renally.
Question 2:
A nurse practitioner reviews laboratory results for a patient presenting with weight
loss, anxiety, tachycardia, and heat intolerance. The patient’s thyroid-stimulating
hormone (TSH) level is significantly decreased. Which condition is most consistent
with these findings?
A. Hypothyroidism
B. Hyperthyroidism
C. Adrenal insufficiency
D. Pituitary adenoma causing excess TSH secretion
Correct Answer: B. Hyperthyroidism
,2026/2027
Rationale: A low TSH level commonly indicates hyperthyroidism because excessive
circulating thyroid hormones suppress pituitary secretion of TSH through negative
feedback mechanisms. Symptoms such as tachycardia, heat intolerance, nervousness,
and weight loss strongly support this diagnosis. Option A is incorrect because
hypothyroidism typically presents with elevated TSH. Option C does not directly
affect TSH levels in this manner. Option D would result in elevated, not suppressed,
TSH levels.
Question 3:
A newly diagnosed patient with hyperthyroidism presents with palpitations, tremors,
and tachycardia. Which medication is commonly prescribed initially to control these
symptoms?
A. Levothyroxine
B. Propranolol
C. Methimazole withdrawal therapy
D. Digoxin
Correct Answer: B. Propranolol
Rationale: Propranolol, a nonselective beta-adrenergic blocker, is frequently used in
newly diagnosed hyperthyroidism to rapidly control adrenergic symptoms such as
tachycardia, tremors, palpitations, and anxiety. It does not correct thyroid hormone
overproduction but provides symptomatic relief while definitive treatment begins.
Option A would worsen hyperthyroidism. Option C is not appropriate terminology or
therapy. Option D may slow heart rate but is not first-line treatment for hyperthyroid-
related adrenergic symptoms.
Question 4:
Spironolactone (Aldactone) is prescribed for a patient with heart failure. Which
mechanism best explains the therapeutic action of this medication?
A. Inhibition of sodium reabsorption in the loop of Henle
B. Blockade of aldosterone receptors in the distal nephron
C. Direct vasodilation of arterial smooth muscle
D. Suppression of antidiuretic hormone secretion
Correct Answer: B. Blockade of aldosterone receptors in the distal nephron
Rationale: Spironolactone is a potassium-sparing diuretic that acts as an aldosterone
antagonist. It blocks aldosterone receptors in the distal nephron, promoting sodium
and water excretion while conserving potassium. This makes it especially useful in
heart failure and conditions associated with hyperaldosteronism. Option A describes
loop diuretics such as furosemide. Option C is not the primary mechanism of
spironolactone. Option D is unrelated to the drug’s pharmacologic action.
,2026/2027
Question 5:
Heparin exerts its anticoagulant effect primarily through which physiologic
mechanism?
A. Inhibition of platelet aggregation
B. Destruction of circulating fibrin clots
C. Upregulation of antithrombin III activity
D. Blockade of vitamin K synthesis
Correct Answer: C. Upregulation of antithrombin III activity
Rationale: Heparin works by enhancing the activity of antithrombin III, a naturally
occurring anticoagulant that inactivates thrombin and factor Xa. This prevents the
formation and extension of blood clots. Option A is more characteristic of antiplatelet
agents such as aspirin. Option B describes thrombolytic drugs like alteplase. Option D
is the mechanism of warfarin therapy.
Question 6:
During an anaphylactic reaction, which physiologic event occurs after exposure to the
offending antigen?
A. Massive insulin release
B. Increased dopamine production
C. Mast cell degranulation with histamine release
D. Suppression of prostaglandin synthesis
Correct Answer: C. Mast cell degranulation with histamine release
Rationale: Anaphylaxis occurs when mast cells and basophils rapidly release
histamine and other inflammatory mediators after exposure to an allergen. Histamine
causes vasodilation, bronchoconstriction, increased capillary permeability, and
hypotension. Option A is unrelated to allergic reactions. Option B is not central to
anaphylaxis. Option D occurs with NSAID therapy, not allergic hypersensitivity
reactions.
Question 7:
Which therapies are commonly used in the management of moderate to severe
psoriasis?
A. Phototherapy and topical corticosteroids
B. Beta blockers and antihistamines
C. Proton pump inhibitors and antibiotics
D. Opioids and muscle relaxants
, 2026/2027
Correct Answer: A. Phototherapy and topical corticosteroids
Rationale: Psoriasis is commonly managed with topical corticosteroids to reduce
inflammation and phototherapy to slow excessive skin cell proliferation. These
treatments are especially effective in moderate disease. Option B is unrelated to
psoriasis treatment. Option C is used for gastrointestinal conditions. Option D does
not address the inflammatory skin disorder.
Question 8:
Which drug class is considered first-line pharmacologic therapy for most patients with
uncomplicated stage I hypertension?
A. Beta-adrenergic blockers
B. Calcium channel blockers
C. Thiazide diuretics
D. Alpha-adrenergic blockers
Correct Answer: C. Thiazide diuretics
Rationale: Thiazide diuretics are widely recommended as initial therapy for
uncomplicated stage I hypertension because they effectively lower blood pressure,
reduce cardiovascular risk, and are cost-effective. Option A may be indicated for
certain comorbid conditions but is not first-line in uncomplicated hypertension.
Option B is useful but not universally preferred initially. Option D is generally
reserved for specific indications such as benign prostatic hyperplasia.
Question 9:
What is the primary cardiac effect of digitalis glycosides such as digoxin?
A. Positive chronotropic effect
B. Negative chronotropic effect
C. Increased peripheral vascular resistance
D. Suppression of sinoatrial node conduction only
Correct Answer: B. Negative chronotropic effect
Rationale: Digitalis glycosides decrease heart rate through a negative chronotropic
effect while simultaneously increasing the force of myocardial contraction. This
improves cardiac efficiency in heart failure and certain dysrhythmias. Option A is
incorrect because digoxin slows rather than accelerates heart rate. Option C is not a
therapeutic goal of digoxin. Option D is incomplete because the medication affects
both conduction and contractility.
Question 10:
Geneva College NURS 251
Pharmacology Module 9 Complete
Exam Review, Practice Assessments,
and Study Companion 2026/2027
Version
Question 1:
A patient receiving transdermal nitroglycerin therapy for chronic angina is instructed
to remove the patch for several hours each day. What is the primary reason for
implementing a nitrate-free period every 24 hours?
A. To prevent rebound hypertension
B. To reduce the risk of orthostatic hypotension
C. To inhibit the development of nitrate tolerance
D. To improve renal clearance of the medication
Correct Answer: C. To inhibit the development of nitrate tolerance
Rationale: Nitroglycerin therapy requires a daily nitrate-free interval because
continuous exposure to nitrates leads to pharmacologic tolerance, reducing the drug’s
effectiveness in relieving angina. By removing the patch or withholding the
medication for several hours each day, the body’s responsiveness to nitrates is
restored. Option A is incorrect because rebound hypertension is not the primary
concern. Option B may occur with nitrates but is not the reason for the nitrate-free
period. Option D is incorrect because nitroglycerin is metabolized primarily by the
liver rather than cleared renally.
Question 2:
A nurse practitioner reviews laboratory results for a patient presenting with weight
loss, anxiety, tachycardia, and heat intolerance. The patient’s thyroid-stimulating
hormone (TSH) level is significantly decreased. Which condition is most consistent
with these findings?
A. Hypothyroidism
B. Hyperthyroidism
C. Adrenal insufficiency
D. Pituitary adenoma causing excess TSH secretion
Correct Answer: B. Hyperthyroidism
,2026/2027
Rationale: A low TSH level commonly indicates hyperthyroidism because excessive
circulating thyroid hormones suppress pituitary secretion of TSH through negative
feedback mechanisms. Symptoms such as tachycardia, heat intolerance, nervousness,
and weight loss strongly support this diagnosis. Option A is incorrect because
hypothyroidism typically presents with elevated TSH. Option C does not directly
affect TSH levels in this manner. Option D would result in elevated, not suppressed,
TSH levels.
Question 3:
A newly diagnosed patient with hyperthyroidism presents with palpitations, tremors,
and tachycardia. Which medication is commonly prescribed initially to control these
symptoms?
A. Levothyroxine
B. Propranolol
C. Methimazole withdrawal therapy
D. Digoxin
Correct Answer: B. Propranolol
Rationale: Propranolol, a nonselective beta-adrenergic blocker, is frequently used in
newly diagnosed hyperthyroidism to rapidly control adrenergic symptoms such as
tachycardia, tremors, palpitations, and anxiety. It does not correct thyroid hormone
overproduction but provides symptomatic relief while definitive treatment begins.
Option A would worsen hyperthyroidism. Option C is not appropriate terminology or
therapy. Option D may slow heart rate but is not first-line treatment for hyperthyroid-
related adrenergic symptoms.
Question 4:
Spironolactone (Aldactone) is prescribed for a patient with heart failure. Which
mechanism best explains the therapeutic action of this medication?
A. Inhibition of sodium reabsorption in the loop of Henle
B. Blockade of aldosterone receptors in the distal nephron
C. Direct vasodilation of arterial smooth muscle
D. Suppression of antidiuretic hormone secretion
Correct Answer: B. Blockade of aldosterone receptors in the distal nephron
Rationale: Spironolactone is a potassium-sparing diuretic that acts as an aldosterone
antagonist. It blocks aldosterone receptors in the distal nephron, promoting sodium
and water excretion while conserving potassium. This makes it especially useful in
heart failure and conditions associated with hyperaldosteronism. Option A describes
loop diuretics such as furosemide. Option C is not the primary mechanism of
spironolactone. Option D is unrelated to the drug’s pharmacologic action.
,2026/2027
Question 5:
Heparin exerts its anticoagulant effect primarily through which physiologic
mechanism?
A. Inhibition of platelet aggregation
B. Destruction of circulating fibrin clots
C. Upregulation of antithrombin III activity
D. Blockade of vitamin K synthesis
Correct Answer: C. Upregulation of antithrombin III activity
Rationale: Heparin works by enhancing the activity of antithrombin III, a naturally
occurring anticoagulant that inactivates thrombin and factor Xa. This prevents the
formation and extension of blood clots. Option A is more characteristic of antiplatelet
agents such as aspirin. Option B describes thrombolytic drugs like alteplase. Option D
is the mechanism of warfarin therapy.
Question 6:
During an anaphylactic reaction, which physiologic event occurs after exposure to the
offending antigen?
A. Massive insulin release
B. Increased dopamine production
C. Mast cell degranulation with histamine release
D. Suppression of prostaglandin synthesis
Correct Answer: C. Mast cell degranulation with histamine release
Rationale: Anaphylaxis occurs when mast cells and basophils rapidly release
histamine and other inflammatory mediators after exposure to an allergen. Histamine
causes vasodilation, bronchoconstriction, increased capillary permeability, and
hypotension. Option A is unrelated to allergic reactions. Option B is not central to
anaphylaxis. Option D occurs with NSAID therapy, not allergic hypersensitivity
reactions.
Question 7:
Which therapies are commonly used in the management of moderate to severe
psoriasis?
A. Phototherapy and topical corticosteroids
B. Beta blockers and antihistamines
C. Proton pump inhibitors and antibiotics
D. Opioids and muscle relaxants
, 2026/2027
Correct Answer: A. Phototherapy and topical corticosteroids
Rationale: Psoriasis is commonly managed with topical corticosteroids to reduce
inflammation and phototherapy to slow excessive skin cell proliferation. These
treatments are especially effective in moderate disease. Option B is unrelated to
psoriasis treatment. Option C is used for gastrointestinal conditions. Option D does
not address the inflammatory skin disorder.
Question 8:
Which drug class is considered first-line pharmacologic therapy for most patients with
uncomplicated stage I hypertension?
A. Beta-adrenergic blockers
B. Calcium channel blockers
C. Thiazide diuretics
D. Alpha-adrenergic blockers
Correct Answer: C. Thiazide diuretics
Rationale: Thiazide diuretics are widely recommended as initial therapy for
uncomplicated stage I hypertension because they effectively lower blood pressure,
reduce cardiovascular risk, and are cost-effective. Option A may be indicated for
certain comorbid conditions but is not first-line in uncomplicated hypertension.
Option B is useful but not universally preferred initially. Option D is generally
reserved for specific indications such as benign prostatic hyperplasia.
Question 9:
What is the primary cardiac effect of digitalis glycosides such as digoxin?
A. Positive chronotropic effect
B. Negative chronotropic effect
C. Increased peripheral vascular resistance
D. Suppression of sinoatrial node conduction only
Correct Answer: B. Negative chronotropic effect
Rationale: Digitalis glycosides decrease heart rate through a negative chronotropic
effect while simultaneously increasing the force of myocardial contraction. This
improves cardiac efficiency in heart failure and certain dysrhythmias. Option A is
incorrect because digoxin slows rather than accelerates heart rate. Option C is not a
therapeutic goal of digoxin. Option D is incomplete because the medication affects
both conduction and contractility.
Question 10:
