Test Bank Complete_ Lehne's Pharmacotherapeutics for Advanced Practice Nurses and
Physician Assistants (3rd Edition, 2024) By Rosenthal| All Chapters 1–94 with Detailed
Answers| Grade A+
Chapter 1: Principles of Pharmacotherapy
Question 1:
A 65-year-old patient with chronic kidney disease is prescribed a drug that is primarily excreted
by the kidneys. Which of the following is the most appropriate action?
A. Prescribe the standard adult dose
B. Increase the dose to ensure efficacy
C. Reduce the dose based on renal function
D. Switch to a drug with hepatic metabolism only
Answer: C. Reduce the dose based on renal function ✅
Explanation:
Renally excreted drugs accumulate in patients with impaired kidney function, increasing the risk
of toxicity. Dose adjustment based on estimated GFR or creatinine clearance is essential.
Chapter 2: Pharmacokinetics
Question 2:
Which of the following best describes the term bioavailability?
A. The rate at which a drug is absorbed
B. The fraction of an administered dose that reaches systemic circulation
C. The volume of distribution of a drug
D. The half-life of a drug
Answer: B. The fraction of an administered dose that reaches systemic circulation ✅
Explanation:
Bioavailability reflects the proportion of the drug that reaches systemic circulation unchanged
after administration, critical for dosing decisions.
Chapter 3: Autonomic Pharmacology
Question 3:
A patient is given a beta-1 selective blocker. Which effect would you most likely observe?
A. Bronchodilation
,B. Increased heart rate
C. Reduced cardiac contractility and heart rate
D. Increased renin secretion
Answer: C. Reduced cardiac contractility and heart rate ✅
Explanation:
Beta-1 receptors are primarily in the heart. Selective beta-1 blockers reduce heart rate and
contractility without significant bronchoconstriction, unlike non-selective beta blockers.
Chapter 4: Cardiovascular Pharmacology
Question 4:
Which antihypertensive is contraindicated in pregnancy due to risk of fetal toxicity?
A. Methyldopa
B. Labetalol
C. ACE inhibitors
D. Nifedipine
Answer: C. ACE inhibitors ✅
Explanation:
ACE inhibitors can cause fetal renal malformations and should be avoided in pregnancy.
Methyldopa and labetalol are preferred first-line agents.
Chapter 5: Anti-infective Agents
Question 5:
A patient develops a rash after taking amoxicillin. What is the most likely mechanism?
A. Direct toxicity
B. Type I hypersensitivity reaction
C. Idiosyncratic metabolic reaction
D. Antimicrobial resistance
Answer: B. Type I hypersensitivity reaction ✅
Explanation:
Penicillin and its derivatives can trigger IgE-mediated hypersensitivity reactions, presenting as
urticaria or rash, sometimes progressing to anaphylaxis.
, Chapter 6: Drugs Affecting the Central Nervous System
Question 6:
A patient is prescribed a benzodiazepine for anxiety. Which of the following is a major risk
associated with long-term use?
A. Hypertension
B. Dependence and withdrawal
C. Hypoglycemia
D. Bradycardia
Answer: B. Dependence and withdrawal ✅
Explanation:
Benzodiazepines enhance GABA activity, causing sedation and anxiolysis. Prolonged use can
lead to tolerance, dependence, and withdrawal symptoms if discontinued abruptly.
Chapter 7: Pain Management
Question 7:
Which opioid is preferred in patients with renal impairment due to lower risk of accumulation?
A. Morphine
B. Fentanyl
C. Codeine
D. Meperidine
Answer: B. Fentanyl ✅
Explanation:
Fentanyl is highly lipophilic and metabolized in the liver with inactive metabolites, making it
safer in renal impairment. Morphine and codeine have active metabolites that can accumulate.
Chapter 8: Endocrine Pharmacology
Question 8:
A patient with type 2 diabetes is started on metformin. Which of the following is a common side
effect?
A. Hypoglycemia
B. Lactic acidosis
Physician Assistants (3rd Edition, 2024) By Rosenthal| All Chapters 1–94 with Detailed
Answers| Grade A+
Chapter 1: Principles of Pharmacotherapy
Question 1:
A 65-year-old patient with chronic kidney disease is prescribed a drug that is primarily excreted
by the kidneys. Which of the following is the most appropriate action?
A. Prescribe the standard adult dose
B. Increase the dose to ensure efficacy
C. Reduce the dose based on renal function
D. Switch to a drug with hepatic metabolism only
Answer: C. Reduce the dose based on renal function ✅
Explanation:
Renally excreted drugs accumulate in patients with impaired kidney function, increasing the risk
of toxicity. Dose adjustment based on estimated GFR or creatinine clearance is essential.
Chapter 2: Pharmacokinetics
Question 2:
Which of the following best describes the term bioavailability?
A. The rate at which a drug is absorbed
B. The fraction of an administered dose that reaches systemic circulation
C. The volume of distribution of a drug
D. The half-life of a drug
Answer: B. The fraction of an administered dose that reaches systemic circulation ✅
Explanation:
Bioavailability reflects the proportion of the drug that reaches systemic circulation unchanged
after administration, critical for dosing decisions.
Chapter 3: Autonomic Pharmacology
Question 3:
A patient is given a beta-1 selective blocker. Which effect would you most likely observe?
A. Bronchodilation
,B. Increased heart rate
C. Reduced cardiac contractility and heart rate
D. Increased renin secretion
Answer: C. Reduced cardiac contractility and heart rate ✅
Explanation:
Beta-1 receptors are primarily in the heart. Selective beta-1 blockers reduce heart rate and
contractility without significant bronchoconstriction, unlike non-selective beta blockers.
Chapter 4: Cardiovascular Pharmacology
Question 4:
Which antihypertensive is contraindicated in pregnancy due to risk of fetal toxicity?
A. Methyldopa
B. Labetalol
C. ACE inhibitors
D. Nifedipine
Answer: C. ACE inhibitors ✅
Explanation:
ACE inhibitors can cause fetal renal malformations and should be avoided in pregnancy.
Methyldopa and labetalol are preferred first-line agents.
Chapter 5: Anti-infective Agents
Question 5:
A patient develops a rash after taking amoxicillin. What is the most likely mechanism?
A. Direct toxicity
B. Type I hypersensitivity reaction
C. Idiosyncratic metabolic reaction
D. Antimicrobial resistance
Answer: B. Type I hypersensitivity reaction ✅
Explanation:
Penicillin and its derivatives can trigger IgE-mediated hypersensitivity reactions, presenting as
urticaria or rash, sometimes progressing to anaphylaxis.
, Chapter 6: Drugs Affecting the Central Nervous System
Question 6:
A patient is prescribed a benzodiazepine for anxiety. Which of the following is a major risk
associated with long-term use?
A. Hypertension
B. Dependence and withdrawal
C. Hypoglycemia
D. Bradycardia
Answer: B. Dependence and withdrawal ✅
Explanation:
Benzodiazepines enhance GABA activity, causing sedation and anxiolysis. Prolonged use can
lead to tolerance, dependence, and withdrawal symptoms if discontinued abruptly.
Chapter 7: Pain Management
Question 7:
Which opioid is preferred in patients with renal impairment due to lower risk of accumulation?
A. Morphine
B. Fentanyl
C. Codeine
D. Meperidine
Answer: B. Fentanyl ✅
Explanation:
Fentanyl is highly lipophilic and metabolized in the liver with inactive metabolites, making it
safer in renal impairment. Morphine and codeine have active metabolites that can accumulate.
Chapter 8: Endocrine Pharmacology
Question 8:
A patient with type 2 diabetes is started on metformin. Which of the following is a common side
effect?
A. Hypoglycemia
B. Lactic acidosis
