NSG 1540 PHARMACOTHERAPEUTICS FINAL EXAM REVIEW: A
COMPREHENSIVE COMPILATION OF 200 PRACTICE QUESTIONS
AND CLINICAL RATIONALES FOR MEDICATION SAFETY,
THERAPEUTIC DRUG MONITORING, AND HIGH-ALERT
MEDICATIONS (2026/2027 CURRICULUM)
1. Which of the following best describes the term "half-life" of a drug?
A. The time required for the drug to reach its peak concentration in the
blood
B. The time required for the body to eliminate 50% of the drug
C. The time required for the drug to be completely absorbed from the
GI tract
D. The time required for the drug to bind to plasma proteins
CORRECT ANSWER: B
Rationale: Half-life is the time it takes for the concentration of a drug in
the blood to decrease by 50%. This concept is crucial for determining
dosing intervals and predicting how long a drug will remain in the body.
Drugs with short half-lives require more frequent dosing, while those
with long half-lives require less frequent dosing or may accumulate to
toxic levels.
2. A patient is receiving a drug that has a narrow therapeutic index.
The nurse should:
A. Monitor drug levels frequently to maintain therapeutic range
B. Administer the drug with food to increase absorption
,C. Decrease the dose if side effects occur
D. Administer the drug at bedtime to reduce adverse effects
CORRECT ANSWER: A
Rationale: A narrow therapeutic index means there is a small margin
between the therapeutic dose and the toxic dose. Close monitoring of
serum drug levels is essential to ensure the drug remains within the
therapeutic window and to prevent toxicity. Drugs with narrow
therapeutic indices include digoxin, lithium, and warfarin.
3. A nurse is caring for a patient with liver disease. Which
pharmacokinetic phase would the nurse expect to be most affected?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
CORRECT ANSWER: C
Rationale: The liver is the primary site of drug metabolism. Patients
with liver disease may have impaired metabolism, leading to drug
accumulation and increased risk of toxicity. Metabolism converts lipid-
soluble drugs into water-soluble metabolites that can be excreted by
the kidneys.
4. The nurse is preparing to administer an enteric-coated medication.
Which instruction should the nurse provide to the patient?
,A. Chew the tablet for faster absorption
B. Crush the tablet and mix with applesauce
C. Swallow the tablet whole without crushing
D. Dissolve the tablet in water before taking
CORRECT ANSWER: C
Rationale: Enteric-coated medications are designed to dissolve in the
small intestine rather than the stomach to prevent gastric irritation or
destruction by stomach acid. The coating should not be disrupted by
chewing or crushing, as this would cause the drug to be released in the
stomach, potentially causing irritation or inactivation.
5. A medication has a high first-pass effect. The nurse understands
that this means:
A. The drug is rapidly excreted by the kidneys
B. The drug is significantly metabolized in the liver before reaching
systemic circulation
C. The drug binds extensively to plasma proteins
D. The drug is absorbed slowly from the GI tract
CORRECT ANSWER: B
Rationale: First-pass effect refers to the extensive metabolism of a drug
by the liver before it reaches systemic circulation. Drugs with high first-
pass effect have low oral bioavailability and may need to be
administered via routes that bypass the liver, such as sublingual, buccal,
or intravenous administration.
, 6. Which route of drug administration provides the fastest onset of
action?
A. Oral
B. Subcutaneous
C. Intravenous
D. Intramuscular
CORRECT ANSWER: C
Rationale: Intravenous administration delivers the drug directly into the
bloodstream, achieving immediate and complete bioavailability. This
route provides the fastest onset of action and allows for precise control
of drug levels, making it ideal for emergency situations and drugs that
cannot be absorbed through other routes.
7. A patient is taking a protein-bound drug. The nurse understands
that if another highly protein-bound drug is administered
concurrently:
A. The first drug will be displaced from protein-binding sites
B. The first drug will have decreased therapeutic effect
C. Both drugs will be excreted more rapidly
D. The drugs will bind to each other in the bloodstream
CORRECT ANSWER: A
Rationale: When two highly protein-bound drugs are administered
together, they compete for binding sites on plasma proteins. The drug
with higher affinity will displace the other, increasing the free
COMPREHENSIVE COMPILATION OF 200 PRACTICE QUESTIONS
AND CLINICAL RATIONALES FOR MEDICATION SAFETY,
THERAPEUTIC DRUG MONITORING, AND HIGH-ALERT
MEDICATIONS (2026/2027 CURRICULUM)
1. Which of the following best describes the term "half-life" of a drug?
A. The time required for the drug to reach its peak concentration in the
blood
B. The time required for the body to eliminate 50% of the drug
C. The time required for the drug to be completely absorbed from the
GI tract
D. The time required for the drug to bind to plasma proteins
CORRECT ANSWER: B
Rationale: Half-life is the time it takes for the concentration of a drug in
the blood to decrease by 50%. This concept is crucial for determining
dosing intervals and predicting how long a drug will remain in the body.
Drugs with short half-lives require more frequent dosing, while those
with long half-lives require less frequent dosing or may accumulate to
toxic levels.
2. A patient is receiving a drug that has a narrow therapeutic index.
The nurse should:
A. Monitor drug levels frequently to maintain therapeutic range
B. Administer the drug with food to increase absorption
,C. Decrease the dose if side effects occur
D. Administer the drug at bedtime to reduce adverse effects
CORRECT ANSWER: A
Rationale: A narrow therapeutic index means there is a small margin
between the therapeutic dose and the toxic dose. Close monitoring of
serum drug levels is essential to ensure the drug remains within the
therapeutic window and to prevent toxicity. Drugs with narrow
therapeutic indices include digoxin, lithium, and warfarin.
3. A nurse is caring for a patient with liver disease. Which
pharmacokinetic phase would the nurse expect to be most affected?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
CORRECT ANSWER: C
Rationale: The liver is the primary site of drug metabolism. Patients
with liver disease may have impaired metabolism, leading to drug
accumulation and increased risk of toxicity. Metabolism converts lipid-
soluble drugs into water-soluble metabolites that can be excreted by
the kidneys.
4. The nurse is preparing to administer an enteric-coated medication.
Which instruction should the nurse provide to the patient?
,A. Chew the tablet for faster absorption
B. Crush the tablet and mix with applesauce
C. Swallow the tablet whole without crushing
D. Dissolve the tablet in water before taking
CORRECT ANSWER: C
Rationale: Enteric-coated medications are designed to dissolve in the
small intestine rather than the stomach to prevent gastric irritation or
destruction by stomach acid. The coating should not be disrupted by
chewing or crushing, as this would cause the drug to be released in the
stomach, potentially causing irritation or inactivation.
5. A medication has a high first-pass effect. The nurse understands
that this means:
A. The drug is rapidly excreted by the kidneys
B. The drug is significantly metabolized in the liver before reaching
systemic circulation
C. The drug binds extensively to plasma proteins
D. The drug is absorbed slowly from the GI tract
CORRECT ANSWER: B
Rationale: First-pass effect refers to the extensive metabolism of a drug
by the liver before it reaches systemic circulation. Drugs with high first-
pass effect have low oral bioavailability and may need to be
administered via routes that bypass the liver, such as sublingual, buccal,
or intravenous administration.
, 6. Which route of drug administration provides the fastest onset of
action?
A. Oral
B. Subcutaneous
C. Intravenous
D. Intramuscular
CORRECT ANSWER: C
Rationale: Intravenous administration delivers the drug directly into the
bloodstream, achieving immediate and complete bioavailability. This
route provides the fastest onset of action and allows for precise control
of drug levels, making it ideal for emergency situations and drugs that
cannot be absorbed through other routes.
7. A patient is taking a protein-bound drug. The nurse understands
that if another highly protein-bound drug is administered
concurrently:
A. The first drug will be displaced from protein-binding sites
B. The first drug will have decreased therapeutic effect
C. Both drugs will be excreted more rapidly
D. The drugs will bind to each other in the bloodstream
CORRECT ANSWER: A
Rationale: When two highly protein-bound drugs are administered
together, they compete for binding sites on plasma proteins. The drug
with higher affinity will displace the other, increasing the free
