NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced Pharmacology for Care of the Family - Chamberlain 2026/2027 - 2026/2027 Official Exam
OBJECTIVE ASSESSMENT - EXAM
NR566 / NR 566 Week 4 Quiz (Latest
2026/2027): Advanced Pharmacology for
Care of the Family - Chamberlain
2026/2027 - 2026/2027 Official Exam
75 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
• Antibiotics & Anti-Infective Agents • Respiratory & Allergy Pharmacotherapy
• Cardiovascular Pharmacotherapy • CNS & Pain Management
• Endocrine & Diabetes Pharmacology • Drug Interactions & Safety Monitoring
COVER PAGE - 1
, 1 SECTION 1 | Antibiotics and Anti-Infective Agents | Q1-Q15 | NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced... 2026/2027
Q1 Question 1 of 75
A 34-year-old woman presents with dysuria, urgency, and suprapubic discomfort for 2 days.
Urinalysis shows positive nitrites and leukocyte esterase. She has no fever or flank pain. Which
antibiotic is the most appropriate first-line outpatient treatment for uncomplicated cystitis?
A. Nitrofurantoin 100 mg twice daily for 5 days
B. Ciprofloxacin 500 mg twice daily for 7 days
C. Amoxicillin 500 mg three times daily for 10 days
D. Doxycycline 100 mg twice daily for 7 days
Correct Answer: A
Rationale:
Nitrofurantoin is the first-line agent for uncomplicated cystitis per current IDSA guidelines due to its excellent
efficacy in the urinary tract and low resistance rates. Ciprofloxacin is reserved for complicated infections due to
resistance concerns and side effects. Amoxicillin has high resistance rates among uropathogens, and doxycycline
is not a standard treatment for cystitis.
Q2 Question 2 of 75
A 52-year-old man develops cellulitis on his left lower extremity after a minor scratch while
gardening. He is afebrile with a 6 cm area of erythema, warmth, and induration. He has no penicillin
allergy. Which antibiotic should be prescribed?
A. Clindamycin 300 mg three times daily for 7 days
B. Cephalexin 500 mg four times daily for 7 days
C. Trimethoprim-sulfamethoxazole DS twice daily for 7 days
D. Vancomycin 1 g IV every 12 hours
Correct Answer: B
Rationale:
Cephalexin, a first-generation cephalosporin, covers streptococci and methicillin-sensitive Staphylococcus aureus,
the most common cellulitis pathogens in immunocompetent patients without purulent drainage. Clindamycin is
appropriate for penicillin-allergic patients. Trimethoprim-sulfamethoxazole targets MRSA but misses streptococci.
Vancomycin IV is for severe or MRSA-suspected infections requiring hospitalization.
NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced Pharmacology for Care of the Famil... — 2026/2027 | Passing Score: 80% | Page 2 of 40
,Q3 Question 3 of 75
A 28-year-old woman is prescribed fluconazole 150 mg as a single oral dose for vulvovaginal
candidiasis. She also takes simvastatin 40 mg daily for hyperlipidemia. What is the most important
concern with this combination?
A. Simvastatin reduces the antifungal efficacy of fluconazole
B. Fluconazole causes hepatotoxicity that simvastatin worsens
C. Fluconazole inhibits CYP3A4, increasing simvastatin levels and the risk of rhabdomyolysis
D. No significant drug interaction exists between these medications
Correct Answer: C
Rationale:
Fluconazole is a potent CYP3A4 inhibitor that significantly raises simvastatin levels, increasing the risk of
rhabdomyolysis and hepatotoxicity. Option B is incorrect because simvastatin does not affect fluconazole. Option
C describes overlapping toxicity but misses the mechanistic interaction. Option D is factually wrong as the
interaction is well documented.
Q4 Question 4 of 75
A 45-year-old man is diagnosed with community-acquired pneumonia and started on azithromycin.
Three days later, he develops palpitations and his ECG shows a prolonged QTc interval of 520 ms.
Which mechanism explains this adverse effect?
A. Azithromycin enhances calcium channel activity in cardiac myocytes
B. Azithromycin directly stimulates the sinoatrial node
C. Azithromycin causes hypomagnesemia leading to arrhythmias
D. Azithromycin blocks cardiac potassium channels, delaying ventricular repolarization
Correct Answer: D
Rationale:
Azithromycin and other macrolides can block the hERG potassium channel, prolonging the QT interval and
increasing the risk of torsades de pointes. Option B describes the opposite of the actual mechanism. Option C is
unrelated to macrolide cardiac effects. Option D is not a recognized primary mechanism of azithromycin-induced
QT prolongation.
NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced Pharmacology for Care of the Famil... — 2026/2027 | Passing Score: 80% | Page 3 of 40
, Q5 Question 5 of 75
A 62-year-old woman with a history of recurrent urinary tract infections is prescribed
trimethoprim-sulfamethoxazole for prophylaxis. She also takes lisinopril and a potassium
supplement. Which electrolyte abnormality is most likely to occur?
A. Hyperkalemia due to trimethoprim acting like amiloride at the distal tubule
B. Hyponatremia due to sulfamethoxazole-induced SIADH
C. Hypocalcemia due to trimethoprim chelating calcium
D. Hypomagnesemia due to increased renal magnesium excretion
Correct Answer: A
Rationale:
Trimethoprim blocks epithelial sodium channels in the distal nephron similarly to amiloride, reducing potassium
secretion and causing hyperkalemia, especially when combined with ACE inhibitors and potassium supplements.
Option B describes a rare adverse effect not the most likely one. Options C and D are not established adverse
effects of trimethoprim.
Q6 Question 6 of 75
A 38-year-old man with HIV and a CD4 count of 120 cells/mm3 develops Pneumocystis jirovecii
pneumonia. He is started on trimethoprim-sulfamethoxazole and experiences a rapid increase in
serum creatinine. Which mechanism best explains the renal effect?
A. Direct tubular toxicity from trimethoprim accumulation
B. Interstitial nephritis due to a hypersensitivity reaction to sulfamethoxazole
C. Acute tubular necrosis from sulfamethoxazole crystalluria
D. Prerenal azotemia from trimethoprim-induced hypotension
Correct Answer: B
Rationale:
Sulfamethoxazole is a well-recognized cause of drug-induced interstitial nephritis, presenting with rising creatinine
after initiation. Option B is not a typical mechanism for trimethoprim. Option C describes crystalluria which is more
associated with older sulfonamides at high doses. Option D is not a documented renal effect of trimethoprim.
NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced Pharmacology for Care of the Famil... — 2026/2027 | Passing Score: 80% | Page 4 of 40
OBJECTIVE ASSESSMENT - EXAM
NR566 / NR 566 Week 4 Quiz (Latest
2026/2027): Advanced Pharmacology for
Care of the Family - Chamberlain
2026/2027 - 2026/2027 Official Exam
75 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
• Antibiotics & Anti-Infective Agents • Respiratory & Allergy Pharmacotherapy
• Cardiovascular Pharmacotherapy • CNS & Pain Management
• Endocrine & Diabetes Pharmacology • Drug Interactions & Safety Monitoring
COVER PAGE - 1
, 1 SECTION 1 | Antibiotics and Anti-Infective Agents | Q1-Q15 | NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced... 2026/2027
Q1 Question 1 of 75
A 34-year-old woman presents with dysuria, urgency, and suprapubic discomfort for 2 days.
Urinalysis shows positive nitrites and leukocyte esterase. She has no fever or flank pain. Which
antibiotic is the most appropriate first-line outpatient treatment for uncomplicated cystitis?
A. Nitrofurantoin 100 mg twice daily for 5 days
B. Ciprofloxacin 500 mg twice daily for 7 days
C. Amoxicillin 500 mg three times daily for 10 days
D. Doxycycline 100 mg twice daily for 7 days
Correct Answer: A
Rationale:
Nitrofurantoin is the first-line agent for uncomplicated cystitis per current IDSA guidelines due to its excellent
efficacy in the urinary tract and low resistance rates. Ciprofloxacin is reserved for complicated infections due to
resistance concerns and side effects. Amoxicillin has high resistance rates among uropathogens, and doxycycline
is not a standard treatment for cystitis.
Q2 Question 2 of 75
A 52-year-old man develops cellulitis on his left lower extremity after a minor scratch while
gardening. He is afebrile with a 6 cm area of erythema, warmth, and induration. He has no penicillin
allergy. Which antibiotic should be prescribed?
A. Clindamycin 300 mg three times daily for 7 days
B. Cephalexin 500 mg four times daily for 7 days
C. Trimethoprim-sulfamethoxazole DS twice daily for 7 days
D. Vancomycin 1 g IV every 12 hours
Correct Answer: B
Rationale:
Cephalexin, a first-generation cephalosporin, covers streptococci and methicillin-sensitive Staphylococcus aureus,
the most common cellulitis pathogens in immunocompetent patients without purulent drainage. Clindamycin is
appropriate for penicillin-allergic patients. Trimethoprim-sulfamethoxazole targets MRSA but misses streptococci.
Vancomycin IV is for severe or MRSA-suspected infections requiring hospitalization.
NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced Pharmacology for Care of the Famil... — 2026/2027 | Passing Score: 80% | Page 2 of 40
,Q3 Question 3 of 75
A 28-year-old woman is prescribed fluconazole 150 mg as a single oral dose for vulvovaginal
candidiasis. She also takes simvastatin 40 mg daily for hyperlipidemia. What is the most important
concern with this combination?
A. Simvastatin reduces the antifungal efficacy of fluconazole
B. Fluconazole causes hepatotoxicity that simvastatin worsens
C. Fluconazole inhibits CYP3A4, increasing simvastatin levels and the risk of rhabdomyolysis
D. No significant drug interaction exists between these medications
Correct Answer: C
Rationale:
Fluconazole is a potent CYP3A4 inhibitor that significantly raises simvastatin levels, increasing the risk of
rhabdomyolysis and hepatotoxicity. Option B is incorrect because simvastatin does not affect fluconazole. Option
C describes overlapping toxicity but misses the mechanistic interaction. Option D is factually wrong as the
interaction is well documented.
Q4 Question 4 of 75
A 45-year-old man is diagnosed with community-acquired pneumonia and started on azithromycin.
Three days later, he develops palpitations and his ECG shows a prolonged QTc interval of 520 ms.
Which mechanism explains this adverse effect?
A. Azithromycin enhances calcium channel activity in cardiac myocytes
B. Azithromycin directly stimulates the sinoatrial node
C. Azithromycin causes hypomagnesemia leading to arrhythmias
D. Azithromycin blocks cardiac potassium channels, delaying ventricular repolarization
Correct Answer: D
Rationale:
Azithromycin and other macrolides can block the hERG potassium channel, prolonging the QT interval and
increasing the risk of torsades de pointes. Option B describes the opposite of the actual mechanism. Option C is
unrelated to macrolide cardiac effects. Option D is not a recognized primary mechanism of azithromycin-induced
QT prolongation.
NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced Pharmacology for Care of the Famil... — 2026/2027 | Passing Score: 80% | Page 3 of 40
, Q5 Question 5 of 75
A 62-year-old woman with a history of recurrent urinary tract infections is prescribed
trimethoprim-sulfamethoxazole for prophylaxis. She also takes lisinopril and a potassium
supplement. Which electrolyte abnormality is most likely to occur?
A. Hyperkalemia due to trimethoprim acting like amiloride at the distal tubule
B. Hyponatremia due to sulfamethoxazole-induced SIADH
C. Hypocalcemia due to trimethoprim chelating calcium
D. Hypomagnesemia due to increased renal magnesium excretion
Correct Answer: A
Rationale:
Trimethoprim blocks epithelial sodium channels in the distal nephron similarly to amiloride, reducing potassium
secretion and causing hyperkalemia, especially when combined with ACE inhibitors and potassium supplements.
Option B describes a rare adverse effect not the most likely one. Options C and D are not established adverse
effects of trimethoprim.
Q6 Question 6 of 75
A 38-year-old man with HIV and a CD4 count of 120 cells/mm3 develops Pneumocystis jirovecii
pneumonia. He is started on trimethoprim-sulfamethoxazole and experiences a rapid increase in
serum creatinine. Which mechanism best explains the renal effect?
A. Direct tubular toxicity from trimethoprim accumulation
B. Interstitial nephritis due to a hypersensitivity reaction to sulfamethoxazole
C. Acute tubular necrosis from sulfamethoxazole crystalluria
D. Prerenal azotemia from trimethoprim-induced hypotension
Correct Answer: B
Rationale:
Sulfamethoxazole is a well-recognized cause of drug-induced interstitial nephritis, presenting with rising creatinine
after initiation. Option B is not a typical mechanism for trimethoprim. Option C describes crystalluria which is more
associated with older sulfonamides at high doses. Option D is not a documented renal effect of trimethoprim.
NR566 / NR 566 Week 4 Quiz (Latest 2026/2027): Advanced Pharmacology for Care of the Famil... — 2026/2027 | Passing Score: 80% | Page 4 of 40
