NURS 6521 Midterm V3 | NURS 6521
Advanced Pharmacology | Actual Q&A
with Rationale (NURS6521 Midterm) |
Walden University
1. A 72-year-old patient with a history of heart failure is being prescribed a new medication
that is highly protein-bound. The nurse practitioner notes the patient’s serum albumin level is
low. What is the primary pharmacokinetic concern?
A. Decreased drug absorption in the GI tract
B. Rapid metabolism of the drug by the liver
C. Increased risk of drug toxicity due to increased free drug levels
D. Decreased volume of distribution
Answer: C
Rationale: When serum albumin levels are low, there are fewer binding sites available for
highly protein-bound drugs. This results in a higher concentration of free, active drug in the
bloodstream, which significantly increases the risk of toxicity. The nurse practitioner must
monitor these patients closely and consider dosage adjustments based on the free drug
fraction.
,2. An Advanced Practice Nurse is teaching a patient about the mechanism of action of a newly
prescribed ACE inhibitor. Which side effect is primarily caused by the accumulation of
bradykinin?
A. Hypokalemia
B. Hypertension
C. Peripheral edema
D. Dry, nonproductive cough
Answer: D
Rationale: ACE inhibitors prevent the breakdown of bradykinin, which can lead to its
accumulation in the respiratory tract. This accumulation is the physiological trigger for the
characteristic dry, hacking cough associated with this drug class. If the cough becomes
intolerable, the patient is typically switched to an Angiotensin II Receptor Blocker (ARB).
3. When prescribing a medication with a narrow therapeutic index, such as lithium, which
action is most critical for the nurse practitioner to perform?
A. Encourage the patient to increase sodium intake significantly
B. Order regular serum drug level monitoring
C. Administer the drug only on an empty stomach
D. Prescribe the highest dose possible to ensure efficacy
Answer: B
,Rationale: Drugs with a narrow therapeutic index have a very small margin between
effective and toxic doses. Regular serum level monitoring is essential to ensure the drug
remains within the therapeutic range (0.6 to 1.2 mEq/L for lithium). Toxicity can lead to
severe neurological and renal complications, making vigilant laboratory assessment a
standard of care.
4. A patient is prescribed Rifampin for the treatment of tuberculosis. What is an essential
teaching point regarding the side effects of this medication?
A. The medication will cause permanent hearing loss
B. The patient should expect severe muscle pain
C. Avoid all dairy products while taking this drug
D. Urine, sweat, and tears may turn an orange-red color
Answer: D
Rationale: Rifampin is known to cause a benign discoloration of body fluids, turning them
orange or reddish. Patients should be warned of this beforehand to prevent unnecessary
alarm or concern. It is also important to note that this discoloration can permanently stain
soft contact lenses.
5. Which pharmacokinetic change is most commonly observed in geriatric patients that
affects drug distribution?
A. Increased percentage of body fat
B. Increased lean body mass
, C. Increased total body water
D. Increased serum albumin levels
Answer: A
Rationale: As individuals age, they typically experience an increase in body fat and a
decrease in lean muscle mass and total body water. This change affects the distribution of
lipophilic drugs, which may have a prolonged half-life due to storage in adipose tissue.
Understanding these physiological shifts is crucial for safe prescribing in the elderly
population.
6. A patient diagnosed with a bacterial infection is prescribed Gentamicin. The nurse
practitioner orders a ‘trough’ level. When should the blood be drawn?
A. 30 minutes after the infusion is completed
B. Immediately before the next dose is administered
C. Exactly mid-way between two doses
D. Two hours after the first dose
Answer: B
Rationale: The trough level represents the lowest concentration of the drug in the
patient’s bloodstream. To accurately measure this, blood must be drawn immediately
(usually 30 minutes or less) before the next scheduled dose. Monitoring trough levels is
vital for aminoglycosides to minimize the risk of nephrotoxicity and ototoxicity.
Advanced Pharmacology | Actual Q&A
with Rationale (NURS6521 Midterm) |
Walden University
1. A 72-year-old patient with a history of heart failure is being prescribed a new medication
that is highly protein-bound. The nurse practitioner notes the patient’s serum albumin level is
low. What is the primary pharmacokinetic concern?
A. Decreased drug absorption in the GI tract
B. Rapid metabolism of the drug by the liver
C. Increased risk of drug toxicity due to increased free drug levels
D. Decreased volume of distribution
Answer: C
Rationale: When serum albumin levels are low, there are fewer binding sites available for
highly protein-bound drugs. This results in a higher concentration of free, active drug in the
bloodstream, which significantly increases the risk of toxicity. The nurse practitioner must
monitor these patients closely and consider dosage adjustments based on the free drug
fraction.
,2. An Advanced Practice Nurse is teaching a patient about the mechanism of action of a newly
prescribed ACE inhibitor. Which side effect is primarily caused by the accumulation of
bradykinin?
A. Hypokalemia
B. Hypertension
C. Peripheral edema
D. Dry, nonproductive cough
Answer: D
Rationale: ACE inhibitors prevent the breakdown of bradykinin, which can lead to its
accumulation in the respiratory tract. This accumulation is the physiological trigger for the
characteristic dry, hacking cough associated with this drug class. If the cough becomes
intolerable, the patient is typically switched to an Angiotensin II Receptor Blocker (ARB).
3. When prescribing a medication with a narrow therapeutic index, such as lithium, which
action is most critical for the nurse practitioner to perform?
A. Encourage the patient to increase sodium intake significantly
B. Order regular serum drug level monitoring
C. Administer the drug only on an empty stomach
D. Prescribe the highest dose possible to ensure efficacy
Answer: B
,Rationale: Drugs with a narrow therapeutic index have a very small margin between
effective and toxic doses. Regular serum level monitoring is essential to ensure the drug
remains within the therapeutic range (0.6 to 1.2 mEq/L for lithium). Toxicity can lead to
severe neurological and renal complications, making vigilant laboratory assessment a
standard of care.
4. A patient is prescribed Rifampin for the treatment of tuberculosis. What is an essential
teaching point regarding the side effects of this medication?
A. The medication will cause permanent hearing loss
B. The patient should expect severe muscle pain
C. Avoid all dairy products while taking this drug
D. Urine, sweat, and tears may turn an orange-red color
Answer: D
Rationale: Rifampin is known to cause a benign discoloration of body fluids, turning them
orange or reddish. Patients should be warned of this beforehand to prevent unnecessary
alarm or concern. It is also important to note that this discoloration can permanently stain
soft contact lenses.
5. Which pharmacokinetic change is most commonly observed in geriatric patients that
affects drug distribution?
A. Increased percentage of body fat
B. Increased lean body mass
, C. Increased total body water
D. Increased serum albumin levels
Answer: A
Rationale: As individuals age, they typically experience an increase in body fat and a
decrease in lean muscle mass and total body water. This change affects the distribution of
lipophilic drugs, which may have a prolonged half-life due to storage in adipose tissue.
Understanding these physiological shifts is crucial for safe prescribing in the elderly
population.
6. A patient diagnosed with a bacterial infection is prescribed Gentamicin. The nurse
practitioner orders a ‘trough’ level. When should the blood be drawn?
A. 30 minutes after the infusion is completed
B. Immediately before the next dose is administered
C. Exactly mid-way between two doses
D. Two hours after the first dose
Answer: B
Rationale: The trough level represents the lowest concentration of the drug in the
patient’s bloodstream. To accurately measure this, blood must be drawn immediately
(usually 30 minutes or less) before the next scheduled dose. Monitoring trough levels is
vital for aminoglycosides to minimize the risk of nephrotoxicity and ototoxicity.
