NURS 6015 EXAM 3 | Questions with
Complete Answers | Graduate
Nursing | Advanced Practice | Pass
Guaranteed - A+ Graded
## [DOMAIN 1: ANTIBIOTICS & ANTIMICROBIAL THERAPY - 60 Questions]
### Penicillins
* *Question 1**
A patient is prescribed amoxicillin-clavulanate for a bacterial sinus infection. The nurse
understands that clavulanic acid is added to amoxicillin because it:
- A) Increases the absorption of amoxicillin in the GI tract
- B) Inhibits bacterial beta-lactamase enzymes that destroy the beta-lactam ring **[CORRECT]**
- C) Reduces the incidence of allergic reactions to penicillin
- D) Extends the half-life of amoxicillin in the body
* *Rationale:** Bacteria produce beta-lactamase enzymes that break the beta-lactam ring
structure of penicillins, rendering the antibiotic ineffective. Clavulanic acid is a beta-lactamase
inhibitor that protects amoxicillin from destruction, allowing it to attach to bacterial cell walls and
inhibit cell wall synthesis. This combination therapy is essential for treating
beta-lactamase-producing organisms.
---
* *Question 2**
A patient reports a history of anaphylaxis to penicillin. The nurse should recognize that which of
the following antibiotics has the highest risk for cross-allergy?
- A) Azithromycin
- B) Ciprofloxacin
- C) Ceftriaxone **[CORRECT]**
- D) Vancomycin
* *Rationale:** Cephalosporins such as ceftriaxone share a beta-lactam ring structure with
penicillins, resulting in 5-10% cross-sensitivity in patients with penicillin allergy. Patients with
severe penicillin allergies (anaphylaxis) have higher cross-reactivity rates. Macrolides
,( azithromycin), fluoroquinolones (ciprofloxacin), and vancomycin have different chemical
structures and do not demonstrate cross-sensitivity with penicillins.
---
* *Question 3**
The nurse is teaching a patient prescribed oral amoxicillin for streptococcal pharyngitis. Which
statement by the patient indicates understanding of the teaching?
- A) "I can stop taking this medication once my sore throat feels better"
- B) "I should take this medication with dairy products to prevent stomach upset"
- C) "I need to complete the entire course even if I feel better before it's finished"
**[CORRECT]**
- D) "I can share this antibiotic with my family member who has similar symptoms"
* *Rationale:** Completing the full antibiotic course is essential to eradicate the infection
completely and prevent antibiotic resistance. Stopping early may lead to partially treated
infections, relapse, and development of resistant organisms. Dairy products reduce absorption
of some antibiotics, and antibiotics should never be shared as this promotes resistance and
inappropriate use.
---
* *Question 4**
A patient receiving IV ampicillin develops a widespread pruritic rash and difficulty breathing 15
minutes after initiation. The nurse's priority action is to:
- A) Slow the infusion rate and apply cool compresses to the rash
- B) Discontinue the infusion immediately and prepare for emergency interventions
**[CORRECT]**
- C) Administer diphenhydramine and continue the infusion at a slower rate
- D) Document the reaction and notify the provider at the end of the shift
* *Rationale:** The patient is exhibiting signs of anaphylaxis (rash, pruritus, respiratory distress)
occurring within the 2-30 minute window typical for penicillin allergic reactions. This is a
life-threatening emergency requiring immediate discontinuation of the antibiotic and preparation
for emergency interventions including epinephrine, airway management, and cardiovascular
support.
---
* *Question 5**
Which assessment finding in a patient receiving long-term penicillin therapy requires immediate
nursing intervention?
- A) White patches on the oral mucosa and cottage cheese-like appearance **[CORRECT]**
- B) Mild nausea relieved by taking medication with food
,- C) Increased urine output after starting therapy
- D) Decreased white blood cell count within normal limits
* *Rationale:** White patches on oral mucosa indicate oral candidiasis (thrush), a superinfection
caused by elimination of normal bacterial flora that allows fungal overgrowth. This is a common
adverse effect of broad-spectrum antibiotics requiring antifungal treatment. While nausea is
common, superinfections represent significant complications requiring intervention.
---
* *Question 6**
A patient taking oral contraceptives is prescribed amoxicillin for a urinary tract infection. The
nurse should include which teaching point?
- A) The antibiotic will increase the effectiveness of her birth control pills
- B) She should use an additional non-hormonal contraceptive method during therapy
**[CORRECT]**
- C) Amoxicillin has no effect on oral contraceptive efficacy
- D) She should stop taking her birth control pills while on antibiotics
* *Rationale:** Penicillins may reduce the effectiveness of oral contraceptives, potentially leading
to unintended pregnancy. Patients should be advised to use additional non-hormonal
contraceptive methods (condoms) during antibiotic therapy and for at least one week after
completion to ensure contraceptive protection.
---
* *Question 7**
The nurse is preparing to administer penicillin G to a patient with a documented history of
penicillin allergy manifesting as a childhood rash. The appropriate action is to:
- A) Administer the medication with diphenhydramine pre-treatment
- B) Obtain a cephalosporin alternative from the provider
- C) Clarify the type and severity of the allergic reaction with the patient and provider
**[CORRECT]**
- D) Proceed with administration since the reaction occurred in childhood
* *Rationale:** Not all documented penicillin allergies represent true IgE-mediated
hypersensitivity. Many childhood rashes were likely viral exanthems rather than drug allergies.
Clarifying the reaction history (timing, symptoms, severity) helps determine if penicillin can be
safely administered or if true allergy exists requiring alternative therapy. Never administer
penicillin to patients with documented anaphylaxis history.
---
**Question 8**
, hich laboratory finding in a patient receiving high-dose IV penicillin requires nursing
W
intervention?
- A) Sodium level of 138 mEq/L
- B) Potassium level of 5.8 mEq/L **[CORRECT]**
- C) Hemoglobin of 12.5 g/dL
- D) Platelet count of 250,000/mm³
* *Rationale:** High-dose penicillin G potassium contains significant potassium loads that can
cause hyperkalemia. A potassium level of 5.8 mEq/L represents hyperkalemia requiring
intervention (normal range 3.5-5.0 mEq/L). The nurse should monitor cardiac rhythm, assess for
symptoms (muscle weakness, cardiac arrhythmias), and notify the provider for potential therapy
modification.
---
### Cephalosporins
* *Question 9**
A patient receiving IV ceftriaxone asks why the nurse is checking the compatibility of
medications before administration. The nurse explains that ceftriaxone is incompatible with
which solution?
- A) 0.9% Sodium chloride
- B) Lactated Ringer's solution
- C) Calcium-containing solutions **[CORRECT]**
- D) Dextrose 5% in water
* *Rationale:** Ceftriaxone forms precipitates with calcium-containing solutions (including
calcium-containing IV fluids and medications), which can lead to fatal pulmonary and renal
emboli. Ceftriaxone should never be mixed with or administered simultaneously with
calcium-containing products, even via different IV lines.
---
* *Question 10**
A patient is prescribed cephalexin for a skin infection. The nurse includes which important
teaching point regarding alcohol consumption?
- A) Alcohol increases the absorption of cephalexin
- B) Alcohol may cause a disulfiram-like reaction with flushing and tachycardia **[CORRECT]**
- C) Alcohol should be consumed with each dose to prevent GI upset
- D) There are no restrictions on alcohol with this medication
* *Rationale:** Some cephalosporins (particularly those with a methylthiotetrazole side chain)
cause disulfiram-like reactions when combined with alcohol, producing unpleasant effects
Complete Answers | Graduate
Nursing | Advanced Practice | Pass
Guaranteed - A+ Graded
## [DOMAIN 1: ANTIBIOTICS & ANTIMICROBIAL THERAPY - 60 Questions]
### Penicillins
* *Question 1**
A patient is prescribed amoxicillin-clavulanate for a bacterial sinus infection. The nurse
understands that clavulanic acid is added to amoxicillin because it:
- A) Increases the absorption of amoxicillin in the GI tract
- B) Inhibits bacterial beta-lactamase enzymes that destroy the beta-lactam ring **[CORRECT]**
- C) Reduces the incidence of allergic reactions to penicillin
- D) Extends the half-life of amoxicillin in the body
* *Rationale:** Bacteria produce beta-lactamase enzymes that break the beta-lactam ring
structure of penicillins, rendering the antibiotic ineffective. Clavulanic acid is a beta-lactamase
inhibitor that protects amoxicillin from destruction, allowing it to attach to bacterial cell walls and
inhibit cell wall synthesis. This combination therapy is essential for treating
beta-lactamase-producing organisms.
---
* *Question 2**
A patient reports a history of anaphylaxis to penicillin. The nurse should recognize that which of
the following antibiotics has the highest risk for cross-allergy?
- A) Azithromycin
- B) Ciprofloxacin
- C) Ceftriaxone **[CORRECT]**
- D) Vancomycin
* *Rationale:** Cephalosporins such as ceftriaxone share a beta-lactam ring structure with
penicillins, resulting in 5-10% cross-sensitivity in patients with penicillin allergy. Patients with
severe penicillin allergies (anaphylaxis) have higher cross-reactivity rates. Macrolides
,( azithromycin), fluoroquinolones (ciprofloxacin), and vancomycin have different chemical
structures and do not demonstrate cross-sensitivity with penicillins.
---
* *Question 3**
The nurse is teaching a patient prescribed oral amoxicillin for streptococcal pharyngitis. Which
statement by the patient indicates understanding of the teaching?
- A) "I can stop taking this medication once my sore throat feels better"
- B) "I should take this medication with dairy products to prevent stomach upset"
- C) "I need to complete the entire course even if I feel better before it's finished"
**[CORRECT]**
- D) "I can share this antibiotic with my family member who has similar symptoms"
* *Rationale:** Completing the full antibiotic course is essential to eradicate the infection
completely and prevent antibiotic resistance. Stopping early may lead to partially treated
infections, relapse, and development of resistant organisms. Dairy products reduce absorption
of some antibiotics, and antibiotics should never be shared as this promotes resistance and
inappropriate use.
---
* *Question 4**
A patient receiving IV ampicillin develops a widespread pruritic rash and difficulty breathing 15
minutes after initiation. The nurse's priority action is to:
- A) Slow the infusion rate and apply cool compresses to the rash
- B) Discontinue the infusion immediately and prepare for emergency interventions
**[CORRECT]**
- C) Administer diphenhydramine and continue the infusion at a slower rate
- D) Document the reaction and notify the provider at the end of the shift
* *Rationale:** The patient is exhibiting signs of anaphylaxis (rash, pruritus, respiratory distress)
occurring within the 2-30 minute window typical for penicillin allergic reactions. This is a
life-threatening emergency requiring immediate discontinuation of the antibiotic and preparation
for emergency interventions including epinephrine, airway management, and cardiovascular
support.
---
* *Question 5**
Which assessment finding in a patient receiving long-term penicillin therapy requires immediate
nursing intervention?
- A) White patches on the oral mucosa and cottage cheese-like appearance **[CORRECT]**
- B) Mild nausea relieved by taking medication with food
,- C) Increased urine output after starting therapy
- D) Decreased white blood cell count within normal limits
* *Rationale:** White patches on oral mucosa indicate oral candidiasis (thrush), a superinfection
caused by elimination of normal bacterial flora that allows fungal overgrowth. This is a common
adverse effect of broad-spectrum antibiotics requiring antifungal treatment. While nausea is
common, superinfections represent significant complications requiring intervention.
---
* *Question 6**
A patient taking oral contraceptives is prescribed amoxicillin for a urinary tract infection. The
nurse should include which teaching point?
- A) The antibiotic will increase the effectiveness of her birth control pills
- B) She should use an additional non-hormonal contraceptive method during therapy
**[CORRECT]**
- C) Amoxicillin has no effect on oral contraceptive efficacy
- D) She should stop taking her birth control pills while on antibiotics
* *Rationale:** Penicillins may reduce the effectiveness of oral contraceptives, potentially leading
to unintended pregnancy. Patients should be advised to use additional non-hormonal
contraceptive methods (condoms) during antibiotic therapy and for at least one week after
completion to ensure contraceptive protection.
---
* *Question 7**
The nurse is preparing to administer penicillin G to a patient with a documented history of
penicillin allergy manifesting as a childhood rash. The appropriate action is to:
- A) Administer the medication with diphenhydramine pre-treatment
- B) Obtain a cephalosporin alternative from the provider
- C) Clarify the type and severity of the allergic reaction with the patient and provider
**[CORRECT]**
- D) Proceed with administration since the reaction occurred in childhood
* *Rationale:** Not all documented penicillin allergies represent true IgE-mediated
hypersensitivity. Many childhood rashes were likely viral exanthems rather than drug allergies.
Clarifying the reaction history (timing, symptoms, severity) helps determine if penicillin can be
safely administered or if true allergy exists requiring alternative therapy. Never administer
penicillin to patients with documented anaphylaxis history.
---
**Question 8**
, hich laboratory finding in a patient receiving high-dose IV penicillin requires nursing
W
intervention?
- A) Sodium level of 138 mEq/L
- B) Potassium level of 5.8 mEq/L **[CORRECT]**
- C) Hemoglobin of 12.5 g/dL
- D) Platelet count of 250,000/mm³
* *Rationale:** High-dose penicillin G potassium contains significant potassium loads that can
cause hyperkalemia. A potassium level of 5.8 mEq/L represents hyperkalemia requiring
intervention (normal range 3.5-5.0 mEq/L). The nurse should monitor cardiac rhythm, assess for
symptoms (muscle weakness, cardiac arrhythmias), and notify the provider for potential therapy
modification.
---
### Cephalosporins
* *Question 9**
A patient receiving IV ceftriaxone asks why the nurse is checking the compatibility of
medications before administration. The nurse explains that ceftriaxone is incompatible with
which solution?
- A) 0.9% Sodium chloride
- B) Lactated Ringer's solution
- C) Calcium-containing solutions **[CORRECT]**
- D) Dextrose 5% in water
* *Rationale:** Ceftriaxone forms precipitates with calcium-containing solutions (including
calcium-containing IV fluids and medications), which can lead to fatal pulmonary and renal
emboli. Ceftriaxone should never be mixed with or administered simultaneously with
calcium-containing products, even via different IV lines.
---
* *Question 10**
A patient is prescribed cephalexin for a skin infection. The nurse includes which important
teaching point regarding alcohol consumption?
- A) Alcohol increases the absorption of cephalexin
- B) Alcohol may cause a disulfiram-like reaction with flushing and tachycardia **[CORRECT]**
- C) Alcohol should be consumed with each dose to prevent GI upset
- D) There are no restrictions on alcohol with this medication
* *Rationale:** Some cephalosporins (particularly those with a methylthiotetrazole side chain)
cause disulfiram-like reactions when combined with alcohol, producing unpleasant effects
