NR-541 \ NR541 \ NR 541 Advanced
Pharmacology Final Practice Exam 2 2025
QUESTIONS AND ANSWERS PLUS
RATIONALES| GUARANTEED PASS | LATEST
UPDATE | CHAMBERLAIN UNIVERSITY
1. Which of the following drugs is considered a selective beta-1 adrenergic
receptor blocker?
A) Propranolol
B) Carvedilol
C) Metoprolol
D) Labetalol
Rationale:
Metoprolol selectively blocks beta-1 adrenergic receptors primarily located in the
heart, reducing heart rate and contractility without significant beta-2 blockade.
Propranolol is non-selective, blocking both beta-1 and beta-2 receptors.
Carvedilol and labetalol block beta and alpha receptors.
,2. A patient is prescribed warfarin. Which laboratory value should be monitored
to ensure therapeutic anticoagulation?
A) Partial thromboplastin time (PTT)
B) International Normalized Ratio (INR)
C) Platelet count
D) Prothrombin time (PT) only
Rationale:
Warfarin's anticoagulant effect is monitored using the INR, a standardized version
of the PT that accounts for variability in lab reagents. PTT is used to monitor
heparin therapy. Platelet count monitors for thrombocytopenia but does not
reflect warfarin anticoagulation.
3. Which of the following medications is the first-line treatment for an acute
asthma exacerbation?
A) Salmeterol
B) Ipratropium bromide
C) Albuterol
D) Theophylline
Rationale:
Albuterol, a short-acting beta-2 agonist (SABA), is the first-line rescue medication
for acute bronchospasm. Salmeterol is a long-acting beta-2 agonist (LABA) not
used for acute attacks. Ipratropium is an anticholinergic and used adjunctively.
Theophylline has a narrow therapeutic index and is less preferred.
,4. Which medication is most appropriate for treating hyperthyroidism during
pregnancy?
A) Methimazole
B) Propylthiouracil (PTU)
C) Radioactive iodine
D) Levothyroxine
Rationale:
PTU is preferred in the first trimester of pregnancy because it has less teratogenic
risk compared to methimazole. Methimazole is generally avoided in early
pregnancy due to risk of birth defects. Radioactive iodine is contraindicated in
pregnancy. Levothyroxine treats hypothyroidism.
5. A patient taking digoxin is showing signs of toxicity. Which electrolyte
imbalance most commonly exacerbates digoxin toxicity?
A) Hypercalcemia
B) Hypernatremia
C) Hypokalemia
D) Hypermagnesemia
Rationale:
Hypokalemia increases digoxin binding to the Na+/K+ ATPase pump, enhancing its
toxic effects. Hypercalcemia can also worsen toxicity but less commonly.
Hypernatremia and hypermagnesemia are not major contributors.
, 6. Which class of antihypertensive drugs works by inhibiting the conversion of
angiotensin I to angiotensin II?
A) ACE inhibitors
B) Beta blockers
C) Calcium channel blockers
D) Diuretics
Rationale:
ACE inhibitors block angiotensin-converting enzyme, preventing formation of
angiotensin II, a potent vasoconstrictor. Beta blockers decrease heart rate and
contractility. Calcium channel blockers inhibit calcium influx in vascular smooth
muscle. Diuretics reduce fluid volume.
7. Which antibiotic class is contraindicated in children due to risk of teeth
discoloration and inhibition of bone growth?
A) Macrolides
B) Aminoglycosides
C) Tetracyclines
D) Sulfonamides
Rationale:
Tetracyclines bind to calcium in developing teeth and bones, causing permanent
discoloration and affecting bone growth. They are contraindicated in children
under 8 years and pregnant women.
Pharmacology Final Practice Exam 2 2025
QUESTIONS AND ANSWERS PLUS
RATIONALES| GUARANTEED PASS | LATEST
UPDATE | CHAMBERLAIN UNIVERSITY
1. Which of the following drugs is considered a selective beta-1 adrenergic
receptor blocker?
A) Propranolol
B) Carvedilol
C) Metoprolol
D) Labetalol
Rationale:
Metoprolol selectively blocks beta-1 adrenergic receptors primarily located in the
heart, reducing heart rate and contractility without significant beta-2 blockade.
Propranolol is non-selective, blocking both beta-1 and beta-2 receptors.
Carvedilol and labetalol block beta and alpha receptors.
,2. A patient is prescribed warfarin. Which laboratory value should be monitored
to ensure therapeutic anticoagulation?
A) Partial thromboplastin time (PTT)
B) International Normalized Ratio (INR)
C) Platelet count
D) Prothrombin time (PT) only
Rationale:
Warfarin's anticoagulant effect is monitored using the INR, a standardized version
of the PT that accounts for variability in lab reagents. PTT is used to monitor
heparin therapy. Platelet count monitors for thrombocytopenia but does not
reflect warfarin anticoagulation.
3. Which of the following medications is the first-line treatment for an acute
asthma exacerbation?
A) Salmeterol
B) Ipratropium bromide
C) Albuterol
D) Theophylline
Rationale:
Albuterol, a short-acting beta-2 agonist (SABA), is the first-line rescue medication
for acute bronchospasm. Salmeterol is a long-acting beta-2 agonist (LABA) not
used for acute attacks. Ipratropium is an anticholinergic and used adjunctively.
Theophylline has a narrow therapeutic index and is less preferred.
,4. Which medication is most appropriate for treating hyperthyroidism during
pregnancy?
A) Methimazole
B) Propylthiouracil (PTU)
C) Radioactive iodine
D) Levothyroxine
Rationale:
PTU is preferred in the first trimester of pregnancy because it has less teratogenic
risk compared to methimazole. Methimazole is generally avoided in early
pregnancy due to risk of birth defects. Radioactive iodine is contraindicated in
pregnancy. Levothyroxine treats hypothyroidism.
5. A patient taking digoxin is showing signs of toxicity. Which electrolyte
imbalance most commonly exacerbates digoxin toxicity?
A) Hypercalcemia
B) Hypernatremia
C) Hypokalemia
D) Hypermagnesemia
Rationale:
Hypokalemia increases digoxin binding to the Na+/K+ ATPase pump, enhancing its
toxic effects. Hypercalcemia can also worsen toxicity but less commonly.
Hypernatremia and hypermagnesemia are not major contributors.
, 6. Which class of antihypertensive drugs works by inhibiting the conversion of
angiotensin I to angiotensin II?
A) ACE inhibitors
B) Beta blockers
C) Calcium channel blockers
D) Diuretics
Rationale:
ACE inhibitors block angiotensin-converting enzyme, preventing formation of
angiotensin II, a potent vasoconstrictor. Beta blockers decrease heart rate and
contractility. Calcium channel blockers inhibit calcium influx in vascular smooth
muscle. Diuretics reduce fluid volume.
7. Which antibiotic class is contraindicated in children due to risk of teeth
discoloration and inhibition of bone growth?
A) Macrolides
B) Aminoglycosides
C) Tetracyclines
D) Sulfonamides
Rationale:
Tetracyclines bind to calcium in developing teeth and bones, causing permanent
discoloration and affecting bone growth. They are contraindicated in children
under 8 years and pregnant women.
