KATZUNG'S BASIC AND
CLINICAL PHARMACOLOGY
16TH EDITION
• AUTHOR(S)TODD W.
VANDERAH
TEST BANK
,Question 1
A nurse is teaching a group of newly licensed nurses about the
purpose of phase III clinical trials in drug development. Which
statement by a participant indicates correct understanding?
A. "These trials determine whether a drug is safe enough for
laboratory animal testing."
B. "These trials compare the drug with current therapy in a
large population before potential approval."
C. "These trials occur after the medication has been widely
marketed."
D. "These trials focus only on determining the chemical
structure of the drug."
Correct Answer: B
Rationale:
Phase III clinical trials evaluate a medication in a large
population to further assess safety, effectiveness, and
comparison with existing treatments before regulatory review
for marketing approval. Option A describes activities that occur
before human clinical trials. Option C refers to post-marketing
surveillance rather than phase III trials. Option D relates to drug
discovery rather than clinical testing.
Question 2
,A nurse is caring for a client who asks why two medications
prescribed for the same condition produce different clinical
effects. Which explanation by the nurse is most accurate?
A. "Every medication has the same mechanism of action, but
different packaging."
B. "Different medications may act on different targets within the
body to achieve similar therapeutic outcomes."
C. "All medications work only by increasing hormone
production."
D. "The differences are caused entirely by the client's diet."
Correct Answer: B
Rationale:
Many medications achieve similar therapeutic goals through
different mechanisms of action, receptors, enzymes, or
physiologic pathways. Understanding pharmacodynamics helps
explain these differences. Option A is incorrect because drugs
often have distinct mechanisms. Option C is overly broad and
inaccurate. Option D may influence drug response but does not
fully explain differing mechanisms.
Question 3
, A nurse administers an oral medication to a client. Which
process primarily determines how much of the administered
dose reaches the systemic circulation in an unchanged form?
A. Drug potency
B. Bioavailability
C. Drug selectivity
D. Therapeutic index
Correct Answer: B
Rationale:
Bioavailability refers to the proportion of an administered dose
that reaches systemic circulation unchanged. Oral medications
may undergo incomplete absorption or first-pass metabolism,
reducing bioavailability. Potency describes the amount of drug
needed to produce an effect. Selectivity refers to preferential
action at specific targets. Therapeutic index compares toxic and
effective doses.
Question 4
A client with impaired liver function is prescribed a medication
extensively metabolized by the liver. Which nursing
consideration is most appropriate?
A. Expect the medication to be eliminated more rapidly.
B. Monitor for signs of drug accumulation and adverse effects.
CLINICAL PHARMACOLOGY
16TH EDITION
• AUTHOR(S)TODD W.
VANDERAH
TEST BANK
,Question 1
A nurse is teaching a group of newly licensed nurses about the
purpose of phase III clinical trials in drug development. Which
statement by a participant indicates correct understanding?
A. "These trials determine whether a drug is safe enough for
laboratory animal testing."
B. "These trials compare the drug with current therapy in a
large population before potential approval."
C. "These trials occur after the medication has been widely
marketed."
D. "These trials focus only on determining the chemical
structure of the drug."
Correct Answer: B
Rationale:
Phase III clinical trials evaluate a medication in a large
population to further assess safety, effectiveness, and
comparison with existing treatments before regulatory review
for marketing approval. Option A describes activities that occur
before human clinical trials. Option C refers to post-marketing
surveillance rather than phase III trials. Option D relates to drug
discovery rather than clinical testing.
Question 2
,A nurse is caring for a client who asks why two medications
prescribed for the same condition produce different clinical
effects. Which explanation by the nurse is most accurate?
A. "Every medication has the same mechanism of action, but
different packaging."
B. "Different medications may act on different targets within the
body to achieve similar therapeutic outcomes."
C. "All medications work only by increasing hormone
production."
D. "The differences are caused entirely by the client's diet."
Correct Answer: B
Rationale:
Many medications achieve similar therapeutic goals through
different mechanisms of action, receptors, enzymes, or
physiologic pathways. Understanding pharmacodynamics helps
explain these differences. Option A is incorrect because drugs
often have distinct mechanisms. Option C is overly broad and
inaccurate. Option D may influence drug response but does not
fully explain differing mechanisms.
Question 3
, A nurse administers an oral medication to a client. Which
process primarily determines how much of the administered
dose reaches the systemic circulation in an unchanged form?
A. Drug potency
B. Bioavailability
C. Drug selectivity
D. Therapeutic index
Correct Answer: B
Rationale:
Bioavailability refers to the proportion of an administered dose
that reaches systemic circulation unchanged. Oral medications
may undergo incomplete absorption or first-pass metabolism,
reducing bioavailability. Potency describes the amount of drug
needed to produce an effect. Selectivity refers to preferential
action at specific targets. Therapeutic index compares toxic and
effective doses.
Question 4
A client with impaired liver function is prescribed a medication
extensively metabolized by the liver. Which nursing
consideration is most appropriate?
A. Expect the medication to be eliminated more rapidly.
B. Monitor for signs of drug accumulation and adverse effects.
