, Question 1
A patient with heart failure and reduced ejection fraction is prescribed
sacubitril/valsartan. Which mechanism best explains the combined therapeutic
effect?
A. Inhibition of neprilysin and angiotensin II receptor blockade
B. Stimulation of bradykinin and angiotensin-converting enzyme
inhibition
C. Blockade of aldosterone receptors and renin inhibition
D. Activation of natriuretic peptides and beta-adrenergic blockade
Correct Answer: A - Inhibition of neprilysin and angiotensin II
receptor blockade
RATIONALE
Sacubitril inhibits neprilysin, increasing natriuretic peptides, while
valsartan blocks angiotensin II receptors. This dual action reduces
vasoconstriction and fluid retention. Other options misidentify the
targets or mechanisms.
Question 2
Which pathophysiological process is the primary driver of diabetic
nephropathy in patients with chronic hyperglycemia?
A. Advanced glycation end-product accumulation and mesangial
expansion
B. Autoimmune destruction of podocytes
C. Acute tubular necrosis from ischemia
D. Complement-mediated glomerular injury
Correct Answer: A - Advanced glycation end-product
accumulation and mesangial expansion
Page 2
, RATIONALE
Chronic hyperglycemia leads to advanced glycation end-products and
mesangial matrix expansion, causing glomerulosclerosis. Autoimmune
and ischemic mechanisms are not primary in diabetic nephropathy.
Question 3
A provider orders a medication that is a potent CYP3A4 inhibitor. Which
concurrent drug would most likely require a dose reduction to avoid toxicity?
A. Simvastatin
B. Metformin
C. Levothyroxine
D. Penicillin
Correct Answer: A - Simvastatin
RATIONALE
Simvastatin is metabolized by CYP3A4; inhibition increases its levels,
raising myopathy risk. Metformin, levothyroxine, and penicillin are
not primarily CYP3A4 substrates.
Question 4
Which assessment finding is most consistent with early compensated metabolic
acidosis?
A. Increased respiratory rate with normal pH
B. Decreased respiratory rate with elevated pH
C. Normal respiratory rate with decreased PaCO2
D. Increased respiratory rate with elevated bicarbonate
Correct Answer: A - Increased respiratory rate with normal pH
Page 3
, RATIONALE
In compensated metabolic acidosis, respiratory rate increases to blow
off CO2, normalizing pH. Other options describe uncompensated or
different acid-base states.
Question 5
A patient on warfarin has an INR of 6.5 without bleeding. Which intervention
is most appropriate?
A. Hold warfarin and administer oral vitamin K
B. Administer fresh frozen plasma immediately
C. Continue warfarin and monitor closely
D. Administer protamine sulfate
Correct Answer: A - Hold warfarin and administer oral vitamin
K
RATIONALE
For INR >6 without bleeding, warfarin is held and low-dose oral
vitamin K is given. FFP is for active bleeding; protamine reverses
heparin, not warfarin.
Question 6
Which statement best reflects the concept of 'number needed to treat' (NNT) in
evidence-based practice?
A. The number of patients who must be treated to prevent one additional
adverse outcome
B. The ratio of treated to untreated patients in a clinical trial
C. The percentage of patients who respond to a treatment
D. The number of patients needed to detect a statistically significant
difference
Correct Answer: A - The number of patients who must be treated
to prevent one additional adverse outcome
Page 4
A patient with heart failure and reduced ejection fraction is prescribed
sacubitril/valsartan. Which mechanism best explains the combined therapeutic
effect?
A. Inhibition of neprilysin and angiotensin II receptor blockade
B. Stimulation of bradykinin and angiotensin-converting enzyme
inhibition
C. Blockade of aldosterone receptors and renin inhibition
D. Activation of natriuretic peptides and beta-adrenergic blockade
Correct Answer: A - Inhibition of neprilysin and angiotensin II
receptor blockade
RATIONALE
Sacubitril inhibits neprilysin, increasing natriuretic peptides, while
valsartan blocks angiotensin II receptors. This dual action reduces
vasoconstriction and fluid retention. Other options misidentify the
targets or mechanisms.
Question 2
Which pathophysiological process is the primary driver of diabetic
nephropathy in patients with chronic hyperglycemia?
A. Advanced glycation end-product accumulation and mesangial
expansion
B. Autoimmune destruction of podocytes
C. Acute tubular necrosis from ischemia
D. Complement-mediated glomerular injury
Correct Answer: A - Advanced glycation end-product
accumulation and mesangial expansion
Page 2
, RATIONALE
Chronic hyperglycemia leads to advanced glycation end-products and
mesangial matrix expansion, causing glomerulosclerosis. Autoimmune
and ischemic mechanisms are not primary in diabetic nephropathy.
Question 3
A provider orders a medication that is a potent CYP3A4 inhibitor. Which
concurrent drug would most likely require a dose reduction to avoid toxicity?
A. Simvastatin
B. Metformin
C. Levothyroxine
D. Penicillin
Correct Answer: A - Simvastatin
RATIONALE
Simvastatin is metabolized by CYP3A4; inhibition increases its levels,
raising myopathy risk. Metformin, levothyroxine, and penicillin are
not primarily CYP3A4 substrates.
Question 4
Which assessment finding is most consistent with early compensated metabolic
acidosis?
A. Increased respiratory rate with normal pH
B. Decreased respiratory rate with elevated pH
C. Normal respiratory rate with decreased PaCO2
D. Increased respiratory rate with elevated bicarbonate
Correct Answer: A - Increased respiratory rate with normal pH
Page 3
, RATIONALE
In compensated metabolic acidosis, respiratory rate increases to blow
off CO2, normalizing pH. Other options describe uncompensated or
different acid-base states.
Question 5
A patient on warfarin has an INR of 6.5 without bleeding. Which intervention
is most appropriate?
A. Hold warfarin and administer oral vitamin K
B. Administer fresh frozen plasma immediately
C. Continue warfarin and monitor closely
D. Administer protamine sulfate
Correct Answer: A - Hold warfarin and administer oral vitamin
K
RATIONALE
For INR >6 without bleeding, warfarin is held and low-dose oral
vitamin K is given. FFP is for active bleeding; protamine reverses
heparin, not warfarin.
Question 6
Which statement best reflects the concept of 'number needed to treat' (NNT) in
evidence-based practice?
A. The number of patients who must be treated to prevent one additional
adverse outcome
B. The ratio of treated to untreated patients in a clinical trial
C. The percentage of patients who respond to a treatment
D. The number of patients needed to detect a statistically significant
difference
Correct Answer: A - The number of patients who must be treated
to prevent one additional adverse outcome
Page 4
