NR 511 MIDTERM EXAM/ ACTUAL EXAM 200+
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES GRADED A+ LATEST
Question 1
A patient with chronic kidney disease (CKD) stage 4 is prescribed gabapentin. Which
pharmacokinetic property of gabapentin necessitates dose adjustment in this patient?
A. Extensive hepatic metabolism
B. High protein binding
C. Renal elimination
D. Short half-life
Correct Answer: C
Rationale: Gabapentin is eliminated unchanged by the kidneys. Reduced renal function
significantly decreases clearance, increasing the risk of toxicity unless doses are adjusted.
Question 2
Which beta-adrenergic blocker is most appropriate for a patient with heart failure with reduced
ejection fraction (HFrEF)?
A. Propranolol
B. Atenolol
C. Metoprolol succinate
D. Acebutolol
Correct Answer: C
Rationale: Metoprolol succinate is a beta-1 selective blocker proven to reduce mortality in HFrEF.
Immediate-release formulations and nonselective beta blockers are not preferred.
,Question 3
A patient taking warfarin begins trimethoprim-sulfamethoxazole. What is the primary concern?
A. Reduced warfarin absorption
B. Increased INR due to CYP450 inhibition
C. Additive platelet inhibition
D. Enhanced renal clearance of warfarin
Correct Answer: B
Rationale: Trimethoprim-sulfamethoxazole inhibits CYP2C9, decreasing warfarin metabolism and
increasing INR and bleeding risk.
Question 4
Which drug is contraindicated in patients taking nitrates due to the risk of severe hypotension?
A. Tamsulosin
B. Sildenafil
C. Metoprolol
D. Hydralazine
Correct Answer: B
Rationale: Phosphodiesterase-5 inhibitors such as sildenafil potentiate nitric oxide–mediated
vasodilation, leading to profound hypotension when combined with nitrates.
Question 5
A medication that displays zero-order kinetics is best described by which characteristic?
A. Constant fraction eliminated per unit time
B. Saturable metabolism
,C. Linear dose-concentration relationship
D. Short elimination half-life
Correct Answer: B
Rationale: Zero-order kinetics occur when metabolic pathways are saturated, resulting in a
constant amount (not fraction) of drug eliminated per unit time, as seen with phenytoin and
ethanol.
Question 6
Which antihypertensive medication is associated with reflex tachycardia?
A. Lisinopril
B. Amlodipine
C. Hydralazine
D. Clonidine
Correct Answer: C
Rationale: Hydralazine is a direct arterial vasodilator that commonly causes reflex sympathetic
activation, leading to tachycardia.
Question 7
Which opioid has a ceiling effect for analgesia?
A. Morphine
B. Fentanyl
C. Buprenorphine
D. Methadone
Correct Answer: C
Rationale: Buprenorphine is a partial opioid agonist with a ceiling effect, limiting analgesia and
respiratory depression.
, Question 8
A patient develops a persistent dry cough after starting lisinopril. The mechanism is most directly
related to:
A. Increased aldosterone
B. Accumulation of bradykinin
C. Reduced prostaglandin synthesis
D. Sodium retention
Correct Answer: B
Rationale: ACE inhibitors prevent the breakdown of bradykinin, leading to cough and, in some
cases, angioedema.
Question 9
Which medication requires monitoring of serum potassium due to risk of hyperkalemia?
A. Hydrochlorothiazide
B. Furosemide
C. Spironolactone
D. Metolazone
Correct Answer: C
Rationale: Spironolactone is a potassium-sparing diuretic and aldosterone antagonist that can
cause hyperkalemia, especially in renal impairment.
Question 10
A patient taking phenytoin presents with gingival hyperplasia. This adverse effect is best classified
as:
A. Dose-dependent
B. Idiosyncratic
C. Predictable chronic toxicity
D. Allergic reaction
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES GRADED A+ LATEST
Question 1
A patient with chronic kidney disease (CKD) stage 4 is prescribed gabapentin. Which
pharmacokinetic property of gabapentin necessitates dose adjustment in this patient?
A. Extensive hepatic metabolism
B. High protein binding
C. Renal elimination
D. Short half-life
Correct Answer: C
Rationale: Gabapentin is eliminated unchanged by the kidneys. Reduced renal function
significantly decreases clearance, increasing the risk of toxicity unless doses are adjusted.
Question 2
Which beta-adrenergic blocker is most appropriate for a patient with heart failure with reduced
ejection fraction (HFrEF)?
A. Propranolol
B. Atenolol
C. Metoprolol succinate
D. Acebutolol
Correct Answer: C
Rationale: Metoprolol succinate is a beta-1 selective blocker proven to reduce mortality in HFrEF.
Immediate-release formulations and nonselective beta blockers are not preferred.
,Question 3
A patient taking warfarin begins trimethoprim-sulfamethoxazole. What is the primary concern?
A. Reduced warfarin absorption
B. Increased INR due to CYP450 inhibition
C. Additive platelet inhibition
D. Enhanced renal clearance of warfarin
Correct Answer: B
Rationale: Trimethoprim-sulfamethoxazole inhibits CYP2C9, decreasing warfarin metabolism and
increasing INR and bleeding risk.
Question 4
Which drug is contraindicated in patients taking nitrates due to the risk of severe hypotension?
A. Tamsulosin
B. Sildenafil
C. Metoprolol
D. Hydralazine
Correct Answer: B
Rationale: Phosphodiesterase-5 inhibitors such as sildenafil potentiate nitric oxide–mediated
vasodilation, leading to profound hypotension when combined with nitrates.
Question 5
A medication that displays zero-order kinetics is best described by which characteristic?
A. Constant fraction eliminated per unit time
B. Saturable metabolism
,C. Linear dose-concentration relationship
D. Short elimination half-life
Correct Answer: B
Rationale: Zero-order kinetics occur when metabolic pathways are saturated, resulting in a
constant amount (not fraction) of drug eliminated per unit time, as seen with phenytoin and
ethanol.
Question 6
Which antihypertensive medication is associated with reflex tachycardia?
A. Lisinopril
B. Amlodipine
C. Hydralazine
D. Clonidine
Correct Answer: C
Rationale: Hydralazine is a direct arterial vasodilator that commonly causes reflex sympathetic
activation, leading to tachycardia.
Question 7
Which opioid has a ceiling effect for analgesia?
A. Morphine
B. Fentanyl
C. Buprenorphine
D. Methadone
Correct Answer: C
Rationale: Buprenorphine is a partial opioid agonist with a ceiling effect, limiting analgesia and
respiratory depression.
, Question 8
A patient develops a persistent dry cough after starting lisinopril. The mechanism is most directly
related to:
A. Increased aldosterone
B. Accumulation of bradykinin
C. Reduced prostaglandin synthesis
D. Sodium retention
Correct Answer: B
Rationale: ACE inhibitors prevent the breakdown of bradykinin, leading to cough and, in some
cases, angioedema.
Question 9
Which medication requires monitoring of serum potassium due to risk of hyperkalemia?
A. Hydrochlorothiazide
B. Furosemide
C. Spironolactone
D. Metolazone
Correct Answer: C
Rationale: Spironolactone is a potassium-sparing diuretic and aldosterone antagonist that can
cause hyperkalemia, especially in renal impairment.
Question 10
A patient taking phenytoin presents with gingival hyperplasia. This adverse effect is best classified
as:
A. Dose-dependent
B. Idiosyncratic
C. Predictable chronic toxicity
D. Allergic reaction
