NR 566 Final Exam 2026 | Questions with Answers &
Detailed Rationales | Chamberlain Advanced
Pharmacology | Latest Update | Guaranteed Pass
📚 Section 1: Pharmacology – Antibiotics & Antimicrobials (Questions 1–40)
1. A patient is diagnosed with a urinary tract infection caused by E. coli. The patient
has a history of penicillin allergy. Which antibiotic is most appropriate?
A) Amoxicillin
B) Ciprofloxacin
C) Nitrofurantoin
D) Doxycycline
Answer: C
Explanation: Nitrofurantoin is a first-line agent for uncomplicated UTIs and is safe in patients
with penicillin allergy. It is specifically concentrated in the urine and achieves high levels in
the bladder. Ciprofloxacin is a fluoroquinolone that can be used but carries more risks.
Amoxicillin is a penicillin (avoided). Doxycycline is generally not first-line for UTIs .
, 2. A patient is prescribed vancomycin for a methicillin-resistant Staphylococcus
aureus (MRSA) infection. The nurse should monitor which laboratory value most
closely?
A) Serum creatinine
B) Serum potassium
C) White blood cell count
D) Hemoglobin
Answer: A
Explanation: Vancomycin is nephrotoxic and requires monitoring of serum creatinine and
trough levels to prevent kidney injury. Vancomycin trough levels should be checked before
the fourth dose. Serum potassium, WBC, and hemoglobin are not the primary monitoring
parameters for vancomycin therapy .
3. A patient on IV vancomycin develops a flushing of the neck and upper body. The
nurse should recognize this as:
A) Anaphylactic shock
B) Red man syndrome
C) Stevens-Johnson syndrome
D) Serum sickness
Answer: B
Explanation: Red man syndrome is a histamine-mediated reaction to rapid IV vancomycin
infusion, characterized by flushing, erythema, and pruritus of the face, neck, and upper
, torso. The infusion should be slowed to 60 minutes or more. Anaphylaxis includes
respiratory distress, and Stevens-Johnson involves skin sloughing .
4. A patient with MRSA pneumonia is prescribed linezolid. What is the most important
teaching point regarding this medication?
A) Avoid alcohol consumption
B) Take with a high-fat meal
C) Avoid sunlight exposure
D) Take with an antacid
Answer: A
Explanation: Linezolid is a reversible MAO inhibitor, and concomitant use with alcohol,
tyramine-rich foods (aged cheese, cured meats), or SSRIs can cause serotonin syndrome
or hypertensive crisis. It can be taken with or without food, and sunlight is not a major
concern .
5. A patient is prescribed doxycycline for acne. Which instruction should the nurse
include?
A) Take with dairy products to prevent GI upset
B) Take with a full glass of water and remain upright for 30 minutes
C) Take with grapefruit juice
D) Avoid all vegetables
, Answer: B
Explanation: Doxycycline can cause esophageal ulceration. Patients should take it with a
full glass of water and remain upright for at least 30 minutes. Dairy products and antacids
should be avoided due to decreased absorption. Grapefruit juice does not significantly
interact with doxycycline .
6. Which antibiotic carries the highest risk of causing Clostridioides difficile
infection?
A) Clindamycin
B) Penicillin
C) Azithromycin
D) Doxycycline
Answer: A
Explanation: Clindamycin is one of the antibiotics most strongly associated with C. difficile
infection, along with cephalosporins and fluoroquinolones. C. difficile infection causes
severe diarrhea and colitis due to disruption of normal gut flora. Metronidazole is the
preferred treatment for mild to moderate CDI, and vancomycin or fidaxomicin for severe
cases .
7. A patient is prescribed metronidazole. Which instruction should the nurse include?
A) Avoid alcohol during and for 48 hours after treatment
Detailed Rationales | Chamberlain Advanced
Pharmacology | Latest Update | Guaranteed Pass
📚 Section 1: Pharmacology – Antibiotics & Antimicrobials (Questions 1–40)
1. A patient is diagnosed with a urinary tract infection caused by E. coli. The patient
has a history of penicillin allergy. Which antibiotic is most appropriate?
A) Amoxicillin
B) Ciprofloxacin
C) Nitrofurantoin
D) Doxycycline
Answer: C
Explanation: Nitrofurantoin is a first-line agent for uncomplicated UTIs and is safe in patients
with penicillin allergy. It is specifically concentrated in the urine and achieves high levels in
the bladder. Ciprofloxacin is a fluoroquinolone that can be used but carries more risks.
Amoxicillin is a penicillin (avoided). Doxycycline is generally not first-line for UTIs .
, 2. A patient is prescribed vancomycin for a methicillin-resistant Staphylococcus
aureus (MRSA) infection. The nurse should monitor which laboratory value most
closely?
A) Serum creatinine
B) Serum potassium
C) White blood cell count
D) Hemoglobin
Answer: A
Explanation: Vancomycin is nephrotoxic and requires monitoring of serum creatinine and
trough levels to prevent kidney injury. Vancomycin trough levels should be checked before
the fourth dose. Serum potassium, WBC, and hemoglobin are not the primary monitoring
parameters for vancomycin therapy .
3. A patient on IV vancomycin develops a flushing of the neck and upper body. The
nurse should recognize this as:
A) Anaphylactic shock
B) Red man syndrome
C) Stevens-Johnson syndrome
D) Serum sickness
Answer: B
Explanation: Red man syndrome is a histamine-mediated reaction to rapid IV vancomycin
infusion, characterized by flushing, erythema, and pruritus of the face, neck, and upper
, torso. The infusion should be slowed to 60 minutes or more. Anaphylaxis includes
respiratory distress, and Stevens-Johnson involves skin sloughing .
4. A patient with MRSA pneumonia is prescribed linezolid. What is the most important
teaching point regarding this medication?
A) Avoid alcohol consumption
B) Take with a high-fat meal
C) Avoid sunlight exposure
D) Take with an antacid
Answer: A
Explanation: Linezolid is a reversible MAO inhibitor, and concomitant use with alcohol,
tyramine-rich foods (aged cheese, cured meats), or SSRIs can cause serotonin syndrome
or hypertensive crisis. It can be taken with or without food, and sunlight is not a major
concern .
5. A patient is prescribed doxycycline for acne. Which instruction should the nurse
include?
A) Take with dairy products to prevent GI upset
B) Take with a full glass of water and remain upright for 30 minutes
C) Take with grapefruit juice
D) Avoid all vegetables
, Answer: B
Explanation: Doxycycline can cause esophageal ulceration. Patients should take it with a
full glass of water and remain upright for at least 30 minutes. Dairy products and antacids
should be avoided due to decreased absorption. Grapefruit juice does not significantly
interact with doxycycline .
6. Which antibiotic carries the highest risk of causing Clostridioides difficile
infection?
A) Clindamycin
B) Penicillin
C) Azithromycin
D) Doxycycline
Answer: A
Explanation: Clindamycin is one of the antibiotics most strongly associated with C. difficile
infection, along with cephalosporins and fluoroquinolones. C. difficile infection causes
severe diarrhea and colitis due to disruption of normal gut flora. Metronidazole is the
preferred treatment for mild to moderate CDI, and vancomycin or fidaxomicin for severe
cases .
7. A patient is prescribed metronidazole. Which instruction should the nurse include?
A) Avoid alcohol during and for 48 hours after treatment
