Focus on Nursing Pharmacology Karch 8th Ed.
Test Bank All 59 Chapters Actual Exam
2026/2027 – Complete NCLEX-Style Questions
with Detailed Rationales | 100% Verified | Pass
Guaranteed – A+ Graded
SECTION A: Foundational Pharmacology Principles (Ch 1–6) — 10
Questions
Q1: A nursing student asks the instructor to explain the difference between
pharmacokinetics and pharmacodynamics. Which response by the instructor is most
accurate?
A. Pharmacokinetics is how a drug affects the body; pharmacodynamics is how the
body acts on the drug
B. Pharmacokinetics is how the body acts on the drug; pharmacodynamics is how a
drug affects the body [CORRECT]
C. Both terms describe the chemical name of a drug
D. Both terms refer exclusively to the FDA approval process
Correct Answer: B
Rationale: Pharmacokinetics (Ch 2) describes absorption, distribution, metabolism, and
excretion—how the body processes a drug. Pharmacodynamics (Ch 1) describes the
,biochemical and physiologic effects of drugs on the body. Chemical names and FDA
approval are unrelated to these definitions.
Q2: A patient is prescribed a drug that has completed Phase III clinical trials and
received FDA approval for marketing. Which phase of drug evaluation is the patient now
participating in?
A. Phase I
B. Phase II
C. Phase III
D. Phase IV [CORRECT]
Correct Answer: D
Rationale: Phase IV (post-marketing surveillance) occurs after FDA approval and
monitors long-term safety, efficacy, and rare adverse effects in the general population
(Ch 1). Phases I–III occur before approval.
Q3: A patient taking oral nitroglycerin reports that the drug does not relieve angina. The
nurse suspects that extensive first-pass hepatic metabolism is inactivating the drug
before it reaches systemic circulation. Which pharmacokinetic process is responsible?
A. Distribution
B. Metabolism [CORRECT]
C. Absorption
D. Excretion
,Correct Answer: B
Rationale: First-pass effect (metabolism, Ch 2) occurs when a drug is absorbed from
the GI tract and transported via the portal vein to the liver, where a significant portion is
metabolized before reaching systemic circulation. Nitroglycerin has extensive first-pass
metabolism, necessitating sublingual or transdermal routes.
Q4: A patient receiving gentamicin has a peak level of 12 mcg/mL and a trough level of
3 mcg/mL. The therapeutic range for peak is 5–10 mcg/mL and for trough is <2
mcg/mL. Which nursing action is priority?
A. Continue the current dosing schedule
B. Hold the next dose and notify the prescriber [CORRECT]
C. Administer the next dose immediately
D. Increase the dose to achieve a higher peak
Correct Answer: B
Rationale: The elevated trough (3 mcg/mL) exceeds the safe limit of <2 mcg/mL,
indicating drug accumulation and increased risk of nephrotoxicity and ototoxicity (Ch 2).
The nurse must hold the dose and notify the prescriber to adjust the regimen.
Q5: A patient develops a severe rash and anaphylaxis after receiving a penicillin
injection. This reaction was not predicted by the drug's pharmacologic profile. Which
type of adverse drug reaction (ADR) has occurred?
A. Type A (augmented/predictable)
B. Type B (bizarre/idiosyncratic) [CORRECT]
, C. Type C (chronic)
D. Type D (delayed)
Correct Answer: B
Rationale: Type B (bizarre) reactions are unpredictable, dose-independent, and often
immunologically mediated (Ch 3). Type A reactions are predictable extensions of
pharmacologic effects; Type C occurs with chronic use; Type D manifests after
prolonged latency.
Q6: A nurse is administering warfarin and notices the patient is also receiving aspirin for
arthritis. The nurse recognizes that the combined effect increases bleeding risk beyond
what either drug produces alone. Which type of drug interaction is this?
A. Additive
B. Synergistic [CORRECT]
C. Antagonistic
D. Incompatibility
Correct Answer: B
Rationale: A synergistic interaction (Ch 3) occurs when two drugs produce an effect
greater than the sum of their individual effects. Warfarin and aspirin both impair
hemostasis through different mechanisms, producing a synergistic increase in bleeding
risk.
Q7: A nurse is preparing to administer digoxin 0.25 mg PO. The patient states, "I already
took my heart pill this morning." Which patient safety action is most appropriate?
Test Bank All 59 Chapters Actual Exam
2026/2027 – Complete NCLEX-Style Questions
with Detailed Rationales | 100% Verified | Pass
Guaranteed – A+ Graded
SECTION A: Foundational Pharmacology Principles (Ch 1–6) — 10
Questions
Q1: A nursing student asks the instructor to explain the difference between
pharmacokinetics and pharmacodynamics. Which response by the instructor is most
accurate?
A. Pharmacokinetics is how a drug affects the body; pharmacodynamics is how the
body acts on the drug
B. Pharmacokinetics is how the body acts on the drug; pharmacodynamics is how a
drug affects the body [CORRECT]
C. Both terms describe the chemical name of a drug
D. Both terms refer exclusively to the FDA approval process
Correct Answer: B
Rationale: Pharmacokinetics (Ch 2) describes absorption, distribution, metabolism, and
excretion—how the body processes a drug. Pharmacodynamics (Ch 1) describes the
,biochemical and physiologic effects of drugs on the body. Chemical names and FDA
approval are unrelated to these definitions.
Q2: A patient is prescribed a drug that has completed Phase III clinical trials and
received FDA approval for marketing. Which phase of drug evaluation is the patient now
participating in?
A. Phase I
B. Phase II
C. Phase III
D. Phase IV [CORRECT]
Correct Answer: D
Rationale: Phase IV (post-marketing surveillance) occurs after FDA approval and
monitors long-term safety, efficacy, and rare adverse effects in the general population
(Ch 1). Phases I–III occur before approval.
Q3: A patient taking oral nitroglycerin reports that the drug does not relieve angina. The
nurse suspects that extensive first-pass hepatic metabolism is inactivating the drug
before it reaches systemic circulation. Which pharmacokinetic process is responsible?
A. Distribution
B. Metabolism [CORRECT]
C. Absorption
D. Excretion
,Correct Answer: B
Rationale: First-pass effect (metabolism, Ch 2) occurs when a drug is absorbed from
the GI tract and transported via the portal vein to the liver, where a significant portion is
metabolized before reaching systemic circulation. Nitroglycerin has extensive first-pass
metabolism, necessitating sublingual or transdermal routes.
Q4: A patient receiving gentamicin has a peak level of 12 mcg/mL and a trough level of
3 mcg/mL. The therapeutic range for peak is 5–10 mcg/mL and for trough is <2
mcg/mL. Which nursing action is priority?
A. Continue the current dosing schedule
B. Hold the next dose and notify the prescriber [CORRECT]
C. Administer the next dose immediately
D. Increase the dose to achieve a higher peak
Correct Answer: B
Rationale: The elevated trough (3 mcg/mL) exceeds the safe limit of <2 mcg/mL,
indicating drug accumulation and increased risk of nephrotoxicity and ototoxicity (Ch 2).
The nurse must hold the dose and notify the prescriber to adjust the regimen.
Q5: A patient develops a severe rash and anaphylaxis after receiving a penicillin
injection. This reaction was not predicted by the drug's pharmacologic profile. Which
type of adverse drug reaction (ADR) has occurred?
A. Type A (augmented/predictable)
B. Type B (bizarre/idiosyncratic) [CORRECT]
, C. Type C (chronic)
D. Type D (delayed)
Correct Answer: B
Rationale: Type B (bizarre) reactions are unpredictable, dose-independent, and often
immunologically mediated (Ch 3). Type A reactions are predictable extensions of
pharmacologic effects; Type C occurs with chronic use; Type D manifests after
prolonged latency.
Q6: A nurse is administering warfarin and notices the patient is also receiving aspirin for
arthritis. The nurse recognizes that the combined effect increases bleeding risk beyond
what either drug produces alone. Which type of drug interaction is this?
A. Additive
B. Synergistic [CORRECT]
C. Antagonistic
D. Incompatibility
Correct Answer: B
Rationale: A synergistic interaction (Ch 3) occurs when two drugs produce an effect
greater than the sum of their individual effects. Warfarin and aspirin both impair
hemostasis through different mechanisms, producing a synergistic increase in bleeding
risk.
Q7: A nurse is preparing to administer digoxin 0.25 mg PO. The patient states, "I already
took my heart pill this morning." Which patient safety action is most appropriate?
