, NR 565 Advanced Pharmacology Exam
V1 (2026/2027) Questions with Answers
& Detailed Rationales
Question 1
A 52-year-old patient with type 2 diabetes mellitus and an eGFR
of 25 mL/min/1.73 m2 is being evaluated for initiation of
glycemic control medication. Which medication is strictly
contraindicated due to the risk of a life-threatening
complication?
A) Glipizide
B) Metformin
C) Liraglutide
D) Pioglitazone
Correct Answer: B) Metformin
Rationale: Metformin is contraindicated in patients with
significantly impaired renal function (typically an eGFR below
30 mL/min/1.73 m2 ) because reduced renal clearance causes
drug accumulation. This accumulation significantly increases
the risk of metformin-associated lactic acidosis, a rare but
potentially fatal condition.
Question 2
A patient with type 2 diabetes inadequately controlled on
metformin is being evaluated for add-on therapy. Their
,echocardiogram reveals a cardiac ejection fraction of 40% with
mild heart failure symptoms. Which medication class should be
avoided because it can exacerbate heart failure?
A) Second-generation sulfonylureas
B) Thiazolidinediones (TZDs)
C) Dipeptidyl peptidase-4 (DPP-4) inhibitors
D) Sodium-glucose cotransporter 2 (SGLT2) inhibitors
Correct Answer: B) Thiazolidinediones (TZDs)
Rationale: Thiazolidinediones (e.g., pioglitazone) promote fluid
retention and plasma volume expansion. In patients with
compromised ventricular function or heart failure, this fluid
overload can drastically worsen cardiac status and precipitate
acute decompensated heart failure.
Question 3
A patient receiving long-term phenytoin therapy develops
ataxia, nystagmus, and severe lethargy. A serum phenytoin level
returns at 35 mcg/mL(therapeutic range is 10 to 20 mcg/mL.
What is the primary pharmacokinetic reason small dose
increases of phenytoin can lead to toxicity?
A) First-order elimination kinetics
B) Zero-order (饱和/saturation) elimination kinetics
C) High first-pass metabolism
D) Extensive plasma protein binding displacement
, Correct Answer: B) Zero-order elimination kinetics
Rationale: At therapeutic and higher concentrations, phenytoin
elimination shifts from first-order to zero-order kinetics
(capacity-limited metabolism). Because the hepatic enzymes
responsible for metabolizing phenytoin become saturated, even a
small incremental increase in dosage can cause a
disproportionately large spike in serum drug levels, rapidly
leading to toxicity.
Question 4
A patient taking a non-selective beta-blocker (e.g., propranolol)
for hypertension has a concurrent history of mild intermittent
asthma. Which complication is most likely to be precipitated by
this medication?
A) Thyroid storm
B) Severe bronchospasm
C) Tachyarrhythmias
D) Hypertensive urgency
Correct Answer: B) Severe bronchospasm
Rationale: Non-selective beta-blockers block both beta-1
(cardiac) and beta-2 (bronchial smooth muscle) receptors.
Blockade of beta-2 receptors in the lungs removes sympathetic
bronchodilation, potentially triggering severe, life-threatening
bronchospasm in patients with reactive airway diseases like
asthma.
V1 (2026/2027) Questions with Answers
& Detailed Rationales
Question 1
A 52-year-old patient with type 2 diabetes mellitus and an eGFR
of 25 mL/min/1.73 m2 is being evaluated for initiation of
glycemic control medication. Which medication is strictly
contraindicated due to the risk of a life-threatening
complication?
A) Glipizide
B) Metformin
C) Liraglutide
D) Pioglitazone
Correct Answer: B) Metformin
Rationale: Metformin is contraindicated in patients with
significantly impaired renal function (typically an eGFR below
30 mL/min/1.73 m2 ) because reduced renal clearance causes
drug accumulation. This accumulation significantly increases
the risk of metformin-associated lactic acidosis, a rare but
potentially fatal condition.
Question 2
A patient with type 2 diabetes inadequately controlled on
metformin is being evaluated for add-on therapy. Their
,echocardiogram reveals a cardiac ejection fraction of 40% with
mild heart failure symptoms. Which medication class should be
avoided because it can exacerbate heart failure?
A) Second-generation sulfonylureas
B) Thiazolidinediones (TZDs)
C) Dipeptidyl peptidase-4 (DPP-4) inhibitors
D) Sodium-glucose cotransporter 2 (SGLT2) inhibitors
Correct Answer: B) Thiazolidinediones (TZDs)
Rationale: Thiazolidinediones (e.g., pioglitazone) promote fluid
retention and plasma volume expansion. In patients with
compromised ventricular function or heart failure, this fluid
overload can drastically worsen cardiac status and precipitate
acute decompensated heart failure.
Question 3
A patient receiving long-term phenytoin therapy develops
ataxia, nystagmus, and severe lethargy. A serum phenytoin level
returns at 35 mcg/mL(therapeutic range is 10 to 20 mcg/mL.
What is the primary pharmacokinetic reason small dose
increases of phenytoin can lead to toxicity?
A) First-order elimination kinetics
B) Zero-order (饱和/saturation) elimination kinetics
C) High first-pass metabolism
D) Extensive plasma protein binding displacement
, Correct Answer: B) Zero-order elimination kinetics
Rationale: At therapeutic and higher concentrations, phenytoin
elimination shifts from first-order to zero-order kinetics
(capacity-limited metabolism). Because the hepatic enzymes
responsible for metabolizing phenytoin become saturated, even a
small incremental increase in dosage can cause a
disproportionately large spike in serum drug levels, rapidly
leading to toxicity.
Question 4
A patient taking a non-selective beta-blocker (e.g., propranolol)
for hypertension has a concurrent history of mild intermittent
asthma. Which complication is most likely to be precipitated by
this medication?
A) Thyroid storm
B) Severe bronchospasm
C) Tachyarrhythmias
D) Hypertensive urgency
Correct Answer: B) Severe bronchospasm
Rationale: Non-selective beta-blockers block both beta-1
(cardiac) and beta-2 (bronchial smooth muscle) receptors.
Blockade of beta-2 receptors in the lungs removes sympathetic
bronchodilation, potentially triggering severe, life-threatening
bronchospasm in patients with reactive airway diseases like
asthma.
