TEST BANK FOR UNDERSTANDING
PHARMACOLOGY, 3RD EDITION – M. LINDA
WORKMAN | ALL CHAPTERS INCLUDED |
2026 UPDATE QUESTIONS AND CORRECT
ANSWERS AND RATIONALES
Section I: Basic Principles & Safety (Questions 1-10)
1. A patient asks why a drug that is given intravenously (IV) acts faster than the same drug given
orally. What is the nurse’s best response?
a) "IV drugs bypass the first-pass effect in the liver."
b) "IV drugs are distributed faster because they are warmed to body temperature."
c) "Oral drugs are broken down by stomach acid before they can work."
d) "IV drugs bind to albumin faster than oral drugs."
Correct Answer: a) "IV drugs bypass the first-pass effect in the liver."
Rationale: The first-pass effect refers to the metabolism of a drug in the liver before it reaches systemic
circulation. Oral drugs undergo this, reducing bioavailability. IV administration bypasses this entirely,
leading to 100% bioavailability and rapid onset.
2. A nurse is reviewing laboratory values for a patient receiving a highly protein-bound medication
(e.g., warfarin). Which laboratory value, if decreased, places the patient at the highest risk for
toxicity?
a) Hemoglobin
b) Serum albumin
c) White blood cell count
d) Serum creatinine
Correct Answer: b) Serum albumin
Rationale: If serum albumin is low (hypoalbuminemia), there are fewer binding sites for the drug. This
results in more free (unbound) drug circulating, which increases the pharmacologic effect and risk for
toxicity.
,3. The nurse administers naloxone (Narcan) to a patient experiencing a morphine overdose. The
naloxone binds to the same receptors as morphine but does not activate them. This is an example of
which drug interaction?
a) Synergism
b) Potentiation
c) Competitive antagonism
d) Non-competitive antagonism
Correct Answer: c) Competitive antagonism
Rationale: Naloxone is a competitive antagonist. It binds to opioid receptors with a higher affinity than
morphine, blocking morphine from binding and reversing its effects without producing opioid effects
itself.
4. According to the 2026 Beers Criteria update, which class of medications should be avoided in older
adults due to a high risk of delirium and cognitive impairment?
a) Proton pump inhibitors (PPIs)
b) Anticholinergics (e.g., diphenhydramine)
c) ACE inhibitors
d) Statins
Correct Answer: b) Anticholinergics (e.g., diphenhydramine)
Rationale: The Beers Criteria consistently warns against the use of anticholinergic medications in older
adults due to their association with confusion, dry mouth, urinary retention, and an increased risk of
falls and delirium. Diphenhydramine (Benadryl) is a classic example.
5. A patient is prescribed a loading dose of a drug. What is the primary purpose of a loading dose?
a) To reduce the risk of anaphylaxis
b) To decrease the frequency of dosing needed
c) To achieve a therapeutic level rapidly
d) To allow for renal excretion of metabolites
Correct Answer: c) To achieve a therapeutic level rapidly
Rationale: A loading dose is a higher initial dose designed to quickly reach the steady-state
concentration (minimum effective concentration) so that therapeutic effects are seen immediately,
rather than waiting 4-5 half-lives.
6. A patient with liver failure is prescribed a medication that is primarily metabolized by the liver. The
nurse anticipates that the prescriber will order:
a) A higher dose to overcome the liver damage
b) A lower dose or increased interval between doses
c) The same dose but administered intramuscularly
d) The same dose but with a high-fat meal
, Correct Answer: b) A lower dose or increased interval between doses
Rationale: In liver failure, drug metabolism is impaired, leading to drug accumulation and toxicity.
Dosage reduction or prolongation of the dosing interval is necessary to prevent adverse effects.
7. A patient reports that their "stomach is upset" after taking a medication. Which pharmacokinetic
phase is most directly affected by the presence of food in the stomach?
a) Absorption
b) Distribution
c) Metabolism
d) Excretion
Correct Answer: a) Absorption
Rationale: Absorption is the movement of the drug from the site of administration into the
bloodstream. Food in the stomach can delay gastric emptying, alter gastric pH, or bind to the drug,
affecting the rate and extent of absorption.
8. The nurse is educating a patient about a sustained-release (SR) capsule. Which instruction is most
important?
a) "You may open the capsule and sprinkle it on applesauce if you have trouble swallowing."
b) "You should crush the tablet to help it dissolve faster."
c) "You should take this medication with a full glass of grapefruit juice."
d) "You must swallow the capsule whole; do not crush or chew it."
Correct Answer: d) "You must swallow the capsule whole; do not crush or chew it."
Rationale: Sustained-release formulations are designed to release the medication over a long period.
Crushing or chewing them can cause a sudden release of the entire dose (dose dumping), leading to
toxicity or rapid loss of effect.
9. A patient is taking Drug X and Drug Y. Drug X increases the metabolism of Drug Y by inducing liver
enzymes. What effect will this have on Drug Y?
a) Increased toxicity of Drug Y
b) Decreased therapeutic effect of Drug Y
c) Increased half-life of Drug Y
d) Decreased excretion of Drug Y
Correct Answer: b) Decreased therapeutic effect of Drug Y
Rationale: If Drug X is an enzyme inducer (e.g., rifampin), it speeds up the metabolism of Drug Y. This
reduces the concentration of Drug Y in the blood, potentially leading to subtherapeutic effects.
10. Which schedule of controlled substances has the highest potential for abuse and no currently
accepted medical use in the United States?
a) Schedule I
b) Schedule II
PHARMACOLOGY, 3RD EDITION – M. LINDA
WORKMAN | ALL CHAPTERS INCLUDED |
2026 UPDATE QUESTIONS AND CORRECT
ANSWERS AND RATIONALES
Section I: Basic Principles & Safety (Questions 1-10)
1. A patient asks why a drug that is given intravenously (IV) acts faster than the same drug given
orally. What is the nurse’s best response?
a) "IV drugs bypass the first-pass effect in the liver."
b) "IV drugs are distributed faster because they are warmed to body temperature."
c) "Oral drugs are broken down by stomach acid before they can work."
d) "IV drugs bind to albumin faster than oral drugs."
Correct Answer: a) "IV drugs bypass the first-pass effect in the liver."
Rationale: The first-pass effect refers to the metabolism of a drug in the liver before it reaches systemic
circulation. Oral drugs undergo this, reducing bioavailability. IV administration bypasses this entirely,
leading to 100% bioavailability and rapid onset.
2. A nurse is reviewing laboratory values for a patient receiving a highly protein-bound medication
(e.g., warfarin). Which laboratory value, if decreased, places the patient at the highest risk for
toxicity?
a) Hemoglobin
b) Serum albumin
c) White blood cell count
d) Serum creatinine
Correct Answer: b) Serum albumin
Rationale: If serum albumin is low (hypoalbuminemia), there are fewer binding sites for the drug. This
results in more free (unbound) drug circulating, which increases the pharmacologic effect and risk for
toxicity.
,3. The nurse administers naloxone (Narcan) to a patient experiencing a morphine overdose. The
naloxone binds to the same receptors as morphine but does not activate them. This is an example of
which drug interaction?
a) Synergism
b) Potentiation
c) Competitive antagonism
d) Non-competitive antagonism
Correct Answer: c) Competitive antagonism
Rationale: Naloxone is a competitive antagonist. It binds to opioid receptors with a higher affinity than
morphine, blocking morphine from binding and reversing its effects without producing opioid effects
itself.
4. According to the 2026 Beers Criteria update, which class of medications should be avoided in older
adults due to a high risk of delirium and cognitive impairment?
a) Proton pump inhibitors (PPIs)
b) Anticholinergics (e.g., diphenhydramine)
c) ACE inhibitors
d) Statins
Correct Answer: b) Anticholinergics (e.g., diphenhydramine)
Rationale: The Beers Criteria consistently warns against the use of anticholinergic medications in older
adults due to their association with confusion, dry mouth, urinary retention, and an increased risk of
falls and delirium. Diphenhydramine (Benadryl) is a classic example.
5. A patient is prescribed a loading dose of a drug. What is the primary purpose of a loading dose?
a) To reduce the risk of anaphylaxis
b) To decrease the frequency of dosing needed
c) To achieve a therapeutic level rapidly
d) To allow for renal excretion of metabolites
Correct Answer: c) To achieve a therapeutic level rapidly
Rationale: A loading dose is a higher initial dose designed to quickly reach the steady-state
concentration (minimum effective concentration) so that therapeutic effects are seen immediately,
rather than waiting 4-5 half-lives.
6. A patient with liver failure is prescribed a medication that is primarily metabolized by the liver. The
nurse anticipates that the prescriber will order:
a) A higher dose to overcome the liver damage
b) A lower dose or increased interval between doses
c) The same dose but administered intramuscularly
d) The same dose but with a high-fat meal
, Correct Answer: b) A lower dose or increased interval between doses
Rationale: In liver failure, drug metabolism is impaired, leading to drug accumulation and toxicity.
Dosage reduction or prolongation of the dosing interval is necessary to prevent adverse effects.
7. A patient reports that their "stomach is upset" after taking a medication. Which pharmacokinetic
phase is most directly affected by the presence of food in the stomach?
a) Absorption
b) Distribution
c) Metabolism
d) Excretion
Correct Answer: a) Absorption
Rationale: Absorption is the movement of the drug from the site of administration into the
bloodstream. Food in the stomach can delay gastric emptying, alter gastric pH, or bind to the drug,
affecting the rate and extent of absorption.
8. The nurse is educating a patient about a sustained-release (SR) capsule. Which instruction is most
important?
a) "You may open the capsule and sprinkle it on applesauce if you have trouble swallowing."
b) "You should crush the tablet to help it dissolve faster."
c) "You should take this medication with a full glass of grapefruit juice."
d) "You must swallow the capsule whole; do not crush or chew it."
Correct Answer: d) "You must swallow the capsule whole; do not crush or chew it."
Rationale: Sustained-release formulations are designed to release the medication over a long period.
Crushing or chewing them can cause a sudden release of the entire dose (dose dumping), leading to
toxicity or rapid loss of effect.
9. A patient is taking Drug X and Drug Y. Drug X increases the metabolism of Drug Y by inducing liver
enzymes. What effect will this have on Drug Y?
a) Increased toxicity of Drug Y
b) Decreased therapeutic effect of Drug Y
c) Increased half-life of Drug Y
d) Decreased excretion of Drug Y
Correct Answer: b) Decreased therapeutic effect of Drug Y
Rationale: If Drug X is an enzyme inducer (e.g., rifampin), it speeds up the metabolism of Drug Y. This
reduces the concentration of Drug Y in the blood, potentially leading to subtherapeutic effects.
10. Which schedule of controlled substances has the highest potential for abuse and no currently
accepted medical use in the United States?
a) Schedule I
b) Schedule II
