NR 565 Final Exam – Adv Pharmacology
Fundamentals – (2026) Actual Questions
& Answers (Chamberlain) 100%
Guarantee Pass
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
Q1: A patient is prescribed a drug that is a weak base with a pKa of 8.4. In which
part of the body will this drug be most highly ionized?
A) Small intestine (pH 7.4)
B) Stomach (pH 1.5–3.5)
C) Blood (pH 7.35–7.45)
D) Urine (pH 5.0–8.0)
Correct Answer: B
Rationale: Weak bases are more ionized in acidic environments (low pH). Ionized drugs
are poorly absorbed across lipid membranes. Weak acids are better absorbed in the
stomach; weak bases are better absorbed in the small intestine .
Q2: Which pharmacokinetic process is most affected by first-pass metabolism?
A) Distribution
B) Metabolism
C) Oral absorption
D) Renal excretion
Correct Answer: B
,Rationale: First-pass metabolism occurs in the liver before the drug reaches systemic
circulation, significantly reducing the bioavailability of orally administered drugs. This is
why some drugs must be given IV or sublingually to bypass first-pass metabolism .
Q3: A 70-year-old patient with heart failure is started on a new medication with
high protein-binding affinity. Which age-related change most increases the risk of
toxicity?
A) Increased glomerular filtration rate
B) Decreased alpha-1-acid glycoprotein levels leading to increased free drug fraction
C) Increased hepatic first-pass effect
D) Decreased adipose tissue distribution
Correct Answer: B
Rationale: Age-related decrease in serum albumin and alpha-1-acid glycoprotein (AAG)
increases free drug concentration for highly protein-bound drugs, risking toxicity. Free
drug is pharmacologically active .
Q4: A patient with a genetic variation in CYP2D6 is prescribed codeine for pain.
The patient reports no relief. What is the most likely mechanism?
A) Rapid glucuronidation
B) Poor metabolizer phenotype; unable to convert codeine to morphine
C) Ultra-rapid metabolizer leading to rapid excretion
D) Increased P-glycoprotein activity in the blood-brain barrier
Correct Answer: B
Rationale: CYP2D6 converts codeine to its active metabolite, morphine. Poor metabolizers
lack analgesic effect because they cannot activate the prodrug. Ultra-rapid metabolizers
are at risk for toxicity (respiratory depression) .
,Q5: Grapefruit juice interacts with simvastatin by which mechanism?
A) Inhibition of CYP3A4, leading to increased statin levels
B) Induction of CYP3A4, leading to decreased statin levels
C) Inhibition of P-glycoprotein, leading to decreased absorption
D) Competition for plasma protein binding sites
Correct Answer: A
Rationale: Grapefruit juice inhibits the CYP3A4 enzyme system, which is responsible for
metabolizing simvastatin. Inhibition leads to increased statin levels, significantly raising
the risk of myopathy and rhabdomyolysis .
SECTION 2: CARDIOVASCULAR PHARMACOLOGY
Q6: Why are nitrate-free periods every 24 hours necessary for a patient on
nitroglycerin therapy?
A) To prevent reflex tachycardia
B) To reduce the risk of methemoglobinemia
C) To inhibit the development of tolerance
D) To allow blood pressure to normalize
Correct Answer: C
Rationale: Continuous exposure to nitrates leads to tolerance due to depletion of
intracellular sulfhydryl groups needed for nitric oxide activation. A daily nitrate-free
interval (typically 10–14 hours) restores sensitivity .
Q7: A patient taking an ACE inhibitor (lisinopril) reports a persistent non-
productive cough. What is the most appropriate next step?
A) Continue lisinopril and add a cough suppressant
B) Discontinue lisinopril and initiate losartan
C) Reduce lisinopril dose to 10 mg
D) Switch to a calcium channel blocker
, Correct Answer: B
Rationale: ACE inhibitors increase bradykinin levels, leading to a dry, persistent cough.
This side effect is not dose-dependent and will not improve with dose reduction. An ARB
(like losartan) provides similar cardiovascular and renal protection without increasing
bradykinin .
Q8: A patient develops angioedema after taking an ACE inhibitor. What is the
appropriate action?
A) Continue medication
B) Switch to an ARB cautiously
C) Add antihistamine only
D) Reduce dose
Correct Answer: B
Rationale: Angioedema is a potentially life-threatening adverse effect of ACE inhibitors.
ARBs are a safe alternative because they do not affect bradykinin metabolism. However,
caution is still warranted .
Q9: Which beta-blocker is considered "cardioselective" (beta-1 selective) and is
preferred in patients with COPD?
A) Propranolol
B) Carvedilol
C) Metoprolol succinate
D) Labetalol
Correct Answer: C
Rationale: Metoprolol and atenolol are beta-1 selective, reducing risk of bronchospasm
compared to non-selective agents like propranolol and carvedilol. This makes them safer
in patients with reactive airway disease .
Fundamentals – (2026) Actual Questions
& Answers (Chamberlain) 100%
Guarantee Pass
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
Q1: A patient is prescribed a drug that is a weak base with a pKa of 8.4. In which
part of the body will this drug be most highly ionized?
A) Small intestine (pH 7.4)
B) Stomach (pH 1.5–3.5)
C) Blood (pH 7.35–7.45)
D) Urine (pH 5.0–8.0)
Correct Answer: B
Rationale: Weak bases are more ionized in acidic environments (low pH). Ionized drugs
are poorly absorbed across lipid membranes. Weak acids are better absorbed in the
stomach; weak bases are better absorbed in the small intestine .
Q2: Which pharmacokinetic process is most affected by first-pass metabolism?
A) Distribution
B) Metabolism
C) Oral absorption
D) Renal excretion
Correct Answer: B
,Rationale: First-pass metabolism occurs in the liver before the drug reaches systemic
circulation, significantly reducing the bioavailability of orally administered drugs. This is
why some drugs must be given IV or sublingually to bypass first-pass metabolism .
Q3: A 70-year-old patient with heart failure is started on a new medication with
high protein-binding affinity. Which age-related change most increases the risk of
toxicity?
A) Increased glomerular filtration rate
B) Decreased alpha-1-acid glycoprotein levels leading to increased free drug fraction
C) Increased hepatic first-pass effect
D) Decreased adipose tissue distribution
Correct Answer: B
Rationale: Age-related decrease in serum albumin and alpha-1-acid glycoprotein (AAG)
increases free drug concentration for highly protein-bound drugs, risking toxicity. Free
drug is pharmacologically active .
Q4: A patient with a genetic variation in CYP2D6 is prescribed codeine for pain.
The patient reports no relief. What is the most likely mechanism?
A) Rapid glucuronidation
B) Poor metabolizer phenotype; unable to convert codeine to morphine
C) Ultra-rapid metabolizer leading to rapid excretion
D) Increased P-glycoprotein activity in the blood-brain barrier
Correct Answer: B
Rationale: CYP2D6 converts codeine to its active metabolite, morphine. Poor metabolizers
lack analgesic effect because they cannot activate the prodrug. Ultra-rapid metabolizers
are at risk for toxicity (respiratory depression) .
,Q5: Grapefruit juice interacts with simvastatin by which mechanism?
A) Inhibition of CYP3A4, leading to increased statin levels
B) Induction of CYP3A4, leading to decreased statin levels
C) Inhibition of P-glycoprotein, leading to decreased absorption
D) Competition for plasma protein binding sites
Correct Answer: A
Rationale: Grapefruit juice inhibits the CYP3A4 enzyme system, which is responsible for
metabolizing simvastatin. Inhibition leads to increased statin levels, significantly raising
the risk of myopathy and rhabdomyolysis .
SECTION 2: CARDIOVASCULAR PHARMACOLOGY
Q6: Why are nitrate-free periods every 24 hours necessary for a patient on
nitroglycerin therapy?
A) To prevent reflex tachycardia
B) To reduce the risk of methemoglobinemia
C) To inhibit the development of tolerance
D) To allow blood pressure to normalize
Correct Answer: C
Rationale: Continuous exposure to nitrates leads to tolerance due to depletion of
intracellular sulfhydryl groups needed for nitric oxide activation. A daily nitrate-free
interval (typically 10–14 hours) restores sensitivity .
Q7: A patient taking an ACE inhibitor (lisinopril) reports a persistent non-
productive cough. What is the most appropriate next step?
A) Continue lisinopril and add a cough suppressant
B) Discontinue lisinopril and initiate losartan
C) Reduce lisinopril dose to 10 mg
D) Switch to a calcium channel blocker
, Correct Answer: B
Rationale: ACE inhibitors increase bradykinin levels, leading to a dry, persistent cough.
This side effect is not dose-dependent and will not improve with dose reduction. An ARB
(like losartan) provides similar cardiovascular and renal protection without increasing
bradykinin .
Q8: A patient develops angioedema after taking an ACE inhibitor. What is the
appropriate action?
A) Continue medication
B) Switch to an ARB cautiously
C) Add antihistamine only
D) Reduce dose
Correct Answer: B
Rationale: Angioedema is a potentially life-threatening adverse effect of ACE inhibitors.
ARBs are a safe alternative because they do not affect bradykinin metabolism. However,
caution is still warranted .
Q9: Which beta-blocker is considered "cardioselective" (beta-1 selective) and is
preferred in patients with COPD?
A) Propranolol
B) Carvedilol
C) Metoprolol succinate
D) Labetalol
Correct Answer: C
Rationale: Metoprolol and atenolol are beta-1 selective, reducing risk of bronchospasm
compared to non-selective agents like propranolol and carvedilol. This makes them safer
in patients with reactive airway disease .
