NR566 | NR566 Advanced Pharmacology for Care
of the Family Wk 3 Midterm v2 | Questions with
Correct Answers and Expert Explanation for Each
Question | Chamberlain
1. A patient with a history of an anaphylactic reaction to penicillin is diagnosed with a
bacterial infection. Which class of antibiotics should the nurse practitioner avoid due
to potential cross-reactivity?
A. Cephalosporins
B. Macrolides
C. Fluoroquinolones
D. Tetracyclines
Correct Answer: A
Expert Explanation: Cephalosporins share a similar beta-lactam ring structure
with penicillins, leading to a risk of cross-reactivity in allergic patients. While the
risk is estimated at 1% to 10%, a history of anaphylaxis warrants complete
avoidance of this class. Macrolides and fluoroquinolones are structurally distinct
and generally safe alternatives for penicillin-allergic individuals.
2. When prescribing Ciprofloxacin for a urinary tract infection, which Black Box
Warning should the provider discuss with the patient?
A. Tendon rupture
,B. Nephrotoxicity
C. Ototoxicity
D. Bone marrow suppression
Correct Answer: A
Expert Explanation: Fluoroquinolones like Ciprofloxacin carry a Black Box
Warning for increased risk of tendonitis and tendon rupture, particularly the
Achilles tendon. This risk is higher in patients over 60, those taking corticosteroids,
and organ transplant recipients. Patients should be instructed to stop the
medication and seek medical attention if they experience any new tendon pain or
swelling.
3. A 24-year-old female is prescribed Doxycycline for acne. What is the most important
educational point regarding pregnancy and this medication?
A. It is safe throughout all trimesters.
B. It increases fertility and may lead to multiple births.
C. It only carries risk during the first two weeks of conception.
D. It should be avoided due to risks of fetal bone development and tooth staining.
Correct Answer: D
,Expert Explanation: Tetracyclines, including Doxycycline, are contraindicated
during pregnancy because they can cause permanent discoloration of teeth and
inhibit fetal bone growth. These medications cross the placenta and bind to calcium
in developing tissues. Women of childbearing age should be counseled on effective
contraception while taking this medication.
4. Which of the following macrolides is known to have the most significant
interactions with the Cytochrome P450 (CYP3A4) system?
A. Azithromycin
B. Both B and C
C. Clarithromycin
D. Erythromycin
Correct Answer: B
Expert Explanation: Erythromycin and Clarithromycin are potent inhibitors of the
CYP3A4 enzyme system, which can lead to toxic levels of other drugs like
theophylline or carbamazepine. Azithromycin does not significantly inhibit these
enzymes and is often preferred for patients on complex drug regimens. Clinicians
must perform a thorough medication review before initiating Erythromycin or
Clarithromycin to avoid adverse drug events.
, 5. A patient is being treated with Vancomycin for a severe MRSA infection. The patient
suddenly develops intense flushing, pruritus, and an erythematous rash on the face
and neck. What is the most likely cause?
A. An IgE-mediated anaphylactic reaction
B. A normal side effect that requires no intervention
C. Toxic Epidermal Necrolysis
D. Red Man Syndrome due to rapid infusion
Correct Answer: D
Expert Explanation: Red Man Syndrome is a rate-related infusion reaction caused
by the release of histamine from mast cells and basophils. It is characterized by
flushing of the upper body and is not a true IgE-mediated allergy. The reaction can
be managed by slowing the infusion rate and administering antihistamines like
diphenhydramine.
6. Gentamicin, an aminoglycoside, requires close monitoring of which two organ
systems due to potential toxicity?
A. Liver and Heart
B. Lungs and Spleen
C. Pancreas and Bladder
of the Family Wk 3 Midterm v2 | Questions with
Correct Answers and Expert Explanation for Each
Question | Chamberlain
1. A patient with a history of an anaphylactic reaction to penicillin is diagnosed with a
bacterial infection. Which class of antibiotics should the nurse practitioner avoid due
to potential cross-reactivity?
A. Cephalosporins
B. Macrolides
C. Fluoroquinolones
D. Tetracyclines
Correct Answer: A
Expert Explanation: Cephalosporins share a similar beta-lactam ring structure
with penicillins, leading to a risk of cross-reactivity in allergic patients. While the
risk is estimated at 1% to 10%, a history of anaphylaxis warrants complete
avoidance of this class. Macrolides and fluoroquinolones are structurally distinct
and generally safe alternatives for penicillin-allergic individuals.
2. When prescribing Ciprofloxacin for a urinary tract infection, which Black Box
Warning should the provider discuss with the patient?
A. Tendon rupture
,B. Nephrotoxicity
C. Ototoxicity
D. Bone marrow suppression
Correct Answer: A
Expert Explanation: Fluoroquinolones like Ciprofloxacin carry a Black Box
Warning for increased risk of tendonitis and tendon rupture, particularly the
Achilles tendon. This risk is higher in patients over 60, those taking corticosteroids,
and organ transplant recipients. Patients should be instructed to stop the
medication and seek medical attention if they experience any new tendon pain or
swelling.
3. A 24-year-old female is prescribed Doxycycline for acne. What is the most important
educational point regarding pregnancy and this medication?
A. It is safe throughout all trimesters.
B. It increases fertility and may lead to multiple births.
C. It only carries risk during the first two weeks of conception.
D. It should be avoided due to risks of fetal bone development and tooth staining.
Correct Answer: D
,Expert Explanation: Tetracyclines, including Doxycycline, are contraindicated
during pregnancy because they can cause permanent discoloration of teeth and
inhibit fetal bone growth. These medications cross the placenta and bind to calcium
in developing tissues. Women of childbearing age should be counseled on effective
contraception while taking this medication.
4. Which of the following macrolides is known to have the most significant
interactions with the Cytochrome P450 (CYP3A4) system?
A. Azithromycin
B. Both B and C
C. Clarithromycin
D. Erythromycin
Correct Answer: B
Expert Explanation: Erythromycin and Clarithromycin are potent inhibitors of the
CYP3A4 enzyme system, which can lead to toxic levels of other drugs like
theophylline or carbamazepine. Azithromycin does not significantly inhibit these
enzymes and is often preferred for patients on complex drug regimens. Clinicians
must perform a thorough medication review before initiating Erythromycin or
Clarithromycin to avoid adverse drug events.
, 5. A patient is being treated with Vancomycin for a severe MRSA infection. The patient
suddenly develops intense flushing, pruritus, and an erythematous rash on the face
and neck. What is the most likely cause?
A. An IgE-mediated anaphylactic reaction
B. A normal side effect that requires no intervention
C. Toxic Epidermal Necrolysis
D. Red Man Syndrome due to rapid infusion
Correct Answer: D
Expert Explanation: Red Man Syndrome is a rate-related infusion reaction caused
by the release of histamine from mast cells and basophils. It is characterized by
flushing of the upper body and is not a true IgE-mediated allergy. The reaction can
be managed by slowing the infusion rate and administering antihistamines like
diphenhydramine.
6. Gentamicin, an aminoglycoside, requires close monitoring of which two organ
systems due to potential toxicity?
A. Liver and Heart
B. Lungs and Spleen
C. Pancreas and Bladder
