NURS 6521N Midterm V3 | NURS 6521N
Advanced Pharmacology | Actual Q&A
with Rationale (NURS6521N Midterm) |
Walden University
1. A patient with hypoalbuminemia is prescribed a medication that is 98% protein-bound. The
Advanced Practice Nurse (APN) knows this condition will result in which pharmacological
effect?
A. Reduced bioavailability of the drug
B. Decreased volume of distribution
C. Enhanced renal clearance of the bound drug fraction
D. Increased risk of drug toxicity due to higher free drug levels
Answer: D
Rationale: Albumin serves as the primary protein for drug binding in the intravascular
space. When protein levels are low, there are fewer binding sites available, which increases
the proportion of free, pharmacologically active drug in the plasma. This elevation in free
drug concentration significantly raises the potential for toxicity and adverse reactions.
2. When prescribing tetracycline to a pediatric patient, for which reason does the APN strictly
avoid this medication for children under 8 years of age?
A. Permanent discoloration of the developing teeth
,B. Severe gastrointestinal ulceration
C. Increased risk of adolescent obesity
D. Premature closure of the epiphyseal plates
Answer: A
Rationale: Tetracyclines possess a high affinity for calcium and can bind to developing
bone and tooth enamel. In pediatric patients, this results in permanent brownish
discoloration of the teeth and potential enamel hypoplasia. Therefore, these agents are
contraindicated in children during the ages of tooth development unless no other
alternative is available for life-threatening conditions.
3. An elderly patient is being treated with digoxin for heart failure. Which physiological
change associated with aging most significantly increases the risk for digoxin toxicity?
A. Increased gastric acidity
B. Decreased glomerular filtration rate (GFR)
C. Enhanced hepatic enzyme activity
D. Decreased body fat percentage
Answer: B
Rationale: Aging is typically accompanied by a progressive decline in renal function and
glomerular filtration rate. Since digoxin is primarily excreted unchanged by the kidneys, a
reduced GFR leads to prolonged half-life and drug accumulation. Monitoring renal function
,and serum digoxin levels is essential in the geriatric population to prevent serious
arrhythmias.
4. Which statement best describes the ‘first-pass effect’ in pharmacokinetics?
A. The initial binding of drugs to plasma proteins
B. The excretion of drugs through the biliary system
C. The metabolism of a drug by the liver before it reaches systemic circulation
D. The absorption of drugs across the blood-brain barrier
Answer: C
Rationale: Orally administered drugs are absorbed from the GI tract into the portal
circulation and travel directly to the liver. Many drugs undergo extensive metabolism
during this initial passage through the liver, which significantly reduces the amount of
active drug reaching the rest of the body. This necessitates higher oral doses or alternative
routes of administration, such as sublingual or parenteral, for drugs with high first-pass
metabolism.
5. The APN is teaching a patient about the use of a newly prescribed ACE inhibitor. Which
adverse effect should the patient be instructed to report immediately because it may indicate
a life-threatening reaction?
A. A persistent dry cough
B. Slightly increased urinary frequency
C. A mild metallic taste in the mouth
, D. Swelling of the lips, tongue, or throat
Answer: D
Rationale: Angioedema is a rare but potentially fatal adverse effect of ACE inhibitors
characterized by rapid swelling of the mucosal tissues. It is caused by the accumulation of
bradykinin and can lead to airway obstruction if the larynx is involved. Any patient
experiencing facial or oropharyngeal swelling must discontinue the drug and seek
emergency medical intervention.
6. A patient with type 2 diabetes is prescribed metformin. Which laboratory value is most
critical for the APN to monitor to prevent lactic acidosis?
A. Serum creatinine and GFR
B. Hemoglobin A1c
C. Serum potassium
D. Alanine aminotransferase (ALT)
Answer: A
Rationale: Metformin is cleared primarily through the kidneys, and impaired renal
function can lead to drug accumulation. High levels of metformin increase the risk of lactic
acidosis, a metabolic emergency with high mortality rates. Current guidelines emphasize
monitoring the estimated glomerular filtration rate (eGFR) to determine appropriate
dosing and safety of metformin therapy.
Advanced Pharmacology | Actual Q&A
with Rationale (NURS6521N Midterm) |
Walden University
1. A patient with hypoalbuminemia is prescribed a medication that is 98% protein-bound. The
Advanced Practice Nurse (APN) knows this condition will result in which pharmacological
effect?
A. Reduced bioavailability of the drug
B. Decreased volume of distribution
C. Enhanced renal clearance of the bound drug fraction
D. Increased risk of drug toxicity due to higher free drug levels
Answer: D
Rationale: Albumin serves as the primary protein for drug binding in the intravascular
space. When protein levels are low, there are fewer binding sites available, which increases
the proportion of free, pharmacologically active drug in the plasma. This elevation in free
drug concentration significantly raises the potential for toxicity and adverse reactions.
2. When prescribing tetracycline to a pediatric patient, for which reason does the APN strictly
avoid this medication for children under 8 years of age?
A. Permanent discoloration of the developing teeth
,B. Severe gastrointestinal ulceration
C. Increased risk of adolescent obesity
D. Premature closure of the epiphyseal plates
Answer: A
Rationale: Tetracyclines possess a high affinity for calcium and can bind to developing
bone and tooth enamel. In pediatric patients, this results in permanent brownish
discoloration of the teeth and potential enamel hypoplasia. Therefore, these agents are
contraindicated in children during the ages of tooth development unless no other
alternative is available for life-threatening conditions.
3. An elderly patient is being treated with digoxin for heart failure. Which physiological
change associated with aging most significantly increases the risk for digoxin toxicity?
A. Increased gastric acidity
B. Decreased glomerular filtration rate (GFR)
C. Enhanced hepatic enzyme activity
D. Decreased body fat percentage
Answer: B
Rationale: Aging is typically accompanied by a progressive decline in renal function and
glomerular filtration rate. Since digoxin is primarily excreted unchanged by the kidneys, a
reduced GFR leads to prolonged half-life and drug accumulation. Monitoring renal function
,and serum digoxin levels is essential in the geriatric population to prevent serious
arrhythmias.
4. Which statement best describes the ‘first-pass effect’ in pharmacokinetics?
A. The initial binding of drugs to plasma proteins
B. The excretion of drugs through the biliary system
C. The metabolism of a drug by the liver before it reaches systemic circulation
D. The absorption of drugs across the blood-brain barrier
Answer: C
Rationale: Orally administered drugs are absorbed from the GI tract into the portal
circulation and travel directly to the liver. Many drugs undergo extensive metabolism
during this initial passage through the liver, which significantly reduces the amount of
active drug reaching the rest of the body. This necessitates higher oral doses or alternative
routes of administration, such as sublingual or parenteral, for drugs with high first-pass
metabolism.
5. The APN is teaching a patient about the use of a newly prescribed ACE inhibitor. Which
adverse effect should the patient be instructed to report immediately because it may indicate
a life-threatening reaction?
A. A persistent dry cough
B. Slightly increased urinary frequency
C. A mild metallic taste in the mouth
, D. Swelling of the lips, tongue, or throat
Answer: D
Rationale: Angioedema is a rare but potentially fatal adverse effect of ACE inhibitors
characterized by rapid swelling of the mucosal tissues. It is caused by the accumulation of
bradykinin and can lead to airway obstruction if the larynx is involved. Any patient
experiencing facial or oropharyngeal swelling must discontinue the drug and seek
emergency medical intervention.
6. A patient with type 2 diabetes is prescribed metformin. Which laboratory value is most
critical for the APN to monitor to prevent lactic acidosis?
A. Serum creatinine and GFR
B. Hemoglobin A1c
C. Serum potassium
D. Alanine aminotransferase (ALT)
Answer: A
Rationale: Metformin is cleared primarily through the kidneys, and impaired renal
function can lead to drug accumulation. High levels of metformin increase the risk of lactic
acidosis, a metabolic emergency with high mortality rates. Current guidelines emphasize
monitoring the estimated glomerular filtration rate (eGFR) to determine appropriate
dosing and safety of metformin therapy.
