BIO301 | BIO301 Pharmacology Exam 4 Version 2 |
Questions with Correct Answers and Expert
Explanation for Each Question | Saint Paul’s School
of Nursing
1. Which of the following describes a superinfection occurring during antibiotic
therapy?
A. An infection that is resistant to all known antibiotic classes
B. A viral infection that occurs simultaneously with a bacterial infection
C. A new infection that appears during the treatment of a primary infection
D. An allergic reaction that mimics the symptoms of an infection
Correct Answer: C
Expert Explanation: Superinfections occur when the body’s normal flora is
destroyed by broad-spectrum antibiotics. This allows opportunistic, often resistant,
organisms to overgrow and cause a secondary infection. Common examples include
vaginal yeast infections and Clostridium difficile colitis. Nurses must educate
patients to report any new symptoms like watery diarrhea or white mouth patches.
Preventing these infections is a key component of effective antimicrobial
stewardship and patient safety.
,2. A patient with a known severe anaphylactic reaction to Penicillin G should most
likely avoid which other class of antibiotics?
A. Aminoglycosides
B. Cephalosporins
C. Tetracyclines
D. Fluoroquinolones
Correct Answer: B
Expert Explanation: Penicillins and cephalosporins share a similar beta-lactam
ring structure. There is a small but significant risk of cross-sensitivity between these
two antibiotic classes. Patients with a history of severe anaphylaxis to penicillin
should generally avoid cephalosporins unless specifically cleared. The nurse must
carefully review the patient’s allergy history before administering the first dose.
Ensuring cross-reactivity risks are managed is essential for safe and effective
pharmacological treatment.
3. What is the primary reason patients are instructed to avoid milk or antacids when
taking oral Tetracycline?
A. They lead to immediate toxic levels of the drug in the blood
B. They increase the risk of severe gastrointestinal bleeding
C. They decrease the absorption of the drug by chelation
,D. They neutralize the antibacterial properties of the medication
Correct Answer: C
Expert Explanation: Tetracyclines bind to calcium, magnesium, and aluminum ions
to form non-absorbable chelates. This chemical reaction significantly reduces the
amount of medication absorbed into the bloodstream. Patients should be taught to
take the medication on an empty stomach or separate it from dairy by hours. Proper
education on drug-food interactions is critical to ensure the infection is treated
effectively. Failure to follow these guidelines often leads to treatment failure and
potential bacterial resistance.
4. Which toxicities are most associated with the use of Aminoglycosides such as
Gentamicin?
A. Hepatotoxicity and cardiotoxicity
B. Ototoxicity and nephrotoxicity
C. Ocular toxicity and peripheral neuropathy
D. Neurotoxicity and pulmonary fibrosis
Correct Answer: B
Expert Explanation: Aminoglycosides are potent antibiotics that can cause
irreversible damage to the inner ear and reversible damage to the kidneys.
Ototoxicity may manifest as tinnitus or hearing loss, while nephrotoxicity is
, monitored via serum creatinine. Nurses must strictly monitor peak and trough
levels to keep the drug within a safe therapeutic range. Ensuring adequate hydration
can help mitigate some of the risks to the renal system. These monitoring steps are
vital for the safe administration of this specific class of antimicrobials.
5. To prevent ‘Red Man Syndrome’ when administering Vancomycin, the nurse should
take which action?
A. Administer the drug via rapid IV bolus
B. Infuse the medication slowly over at least 60 minutes
C. Keep the patient in a dark, cool room during the infusion
D. Apply topical corticosteroids to the skin before the infusion
Correct Answer: B
Expert Explanation: Red Man Syndrome is a rate-dependent infusion reaction
characterized by flushing, rash, and hypotension. It is caused by the rapid release of
histamine rather than being a true allergic reaction. Slowing the infusion rate to at
least 60 to 90 minutes is the standard preventative measure. If the reaction occurs,
the nurse should stop the infusion and notify the provider for further orders. This
protocol ensures patient comfort and prevents potentially dangerous drops in blood
pressure.
Questions with Correct Answers and Expert
Explanation for Each Question | Saint Paul’s School
of Nursing
1. Which of the following describes a superinfection occurring during antibiotic
therapy?
A. An infection that is resistant to all known antibiotic classes
B. A viral infection that occurs simultaneously with a bacterial infection
C. A new infection that appears during the treatment of a primary infection
D. An allergic reaction that mimics the symptoms of an infection
Correct Answer: C
Expert Explanation: Superinfections occur when the body’s normal flora is
destroyed by broad-spectrum antibiotics. This allows opportunistic, often resistant,
organisms to overgrow and cause a secondary infection. Common examples include
vaginal yeast infections and Clostridium difficile colitis. Nurses must educate
patients to report any new symptoms like watery diarrhea or white mouth patches.
Preventing these infections is a key component of effective antimicrobial
stewardship and patient safety.
,2. A patient with a known severe anaphylactic reaction to Penicillin G should most
likely avoid which other class of antibiotics?
A. Aminoglycosides
B. Cephalosporins
C. Tetracyclines
D. Fluoroquinolones
Correct Answer: B
Expert Explanation: Penicillins and cephalosporins share a similar beta-lactam
ring structure. There is a small but significant risk of cross-sensitivity between these
two antibiotic classes. Patients with a history of severe anaphylaxis to penicillin
should generally avoid cephalosporins unless specifically cleared. The nurse must
carefully review the patient’s allergy history before administering the first dose.
Ensuring cross-reactivity risks are managed is essential for safe and effective
pharmacological treatment.
3. What is the primary reason patients are instructed to avoid milk or antacids when
taking oral Tetracycline?
A. They lead to immediate toxic levels of the drug in the blood
B. They increase the risk of severe gastrointestinal bleeding
C. They decrease the absorption of the drug by chelation
,D. They neutralize the antibacterial properties of the medication
Correct Answer: C
Expert Explanation: Tetracyclines bind to calcium, magnesium, and aluminum ions
to form non-absorbable chelates. This chemical reaction significantly reduces the
amount of medication absorbed into the bloodstream. Patients should be taught to
take the medication on an empty stomach or separate it from dairy by hours. Proper
education on drug-food interactions is critical to ensure the infection is treated
effectively. Failure to follow these guidelines often leads to treatment failure and
potential bacterial resistance.
4. Which toxicities are most associated with the use of Aminoglycosides such as
Gentamicin?
A. Hepatotoxicity and cardiotoxicity
B. Ototoxicity and nephrotoxicity
C. Ocular toxicity and peripheral neuropathy
D. Neurotoxicity and pulmonary fibrosis
Correct Answer: B
Expert Explanation: Aminoglycosides are potent antibiotics that can cause
irreversible damage to the inner ear and reversible damage to the kidneys.
Ototoxicity may manifest as tinnitus or hearing loss, while nephrotoxicity is
, monitored via serum creatinine. Nurses must strictly monitor peak and trough
levels to keep the drug within a safe therapeutic range. Ensuring adequate hydration
can help mitigate some of the risks to the renal system. These monitoring steps are
vital for the safe administration of this specific class of antimicrobials.
5. To prevent ‘Red Man Syndrome’ when administering Vancomycin, the nurse should
take which action?
A. Administer the drug via rapid IV bolus
B. Infuse the medication slowly over at least 60 minutes
C. Keep the patient in a dark, cool room during the infusion
D. Apply topical corticosteroids to the skin before the infusion
Correct Answer: B
Expert Explanation: Red Man Syndrome is a rate-dependent infusion reaction
characterized by flushing, rash, and hypotension. It is caused by the rapid release of
histamine rather than being a true allergic reaction. Slowing the infusion rate to at
least 60 to 90 minutes is the standard preventative measure. If the reaction occurs,
the nurse should stop the infusion and notify the provider for further orders. This
protocol ensures patient comfort and prevents potentially dangerous drops in blood
pressure.
