KATZUNG'S BASIC AND
CLINICAL PHARMACOLOGY
16TH EDITION
• AUTHOR(S)TODD W.
VANDERAH
TEST BANK
,Question 1
A nurse is teaching a community group about the stages of
medication development. Which statement by a participant
indicates correct understanding of a phase III clinical trial?
A. "The drug is first tested in laboratory animals to determine
toxicity."
B. "The medication is evaluated in a small group of healthy
volunteers for basic safety."
C. "The drug is compared with current treatments in a large
population to assess effectiveness and adverse effects."
D. "The medication is monitored only after it has been removed
from the market."
Correct Answer: C
Rationale:
Phase III trials involve large groups of participants and compare
a new treatment with existing therapies or placebo to evaluate
efficacy, safety, and common adverse effects before regulatory
approval. Option A describes preclinical testing. Option B
describes phase I trials. Option D does not reflect post-
marketing surveillance, which occurs after approval and not
after removal from the market.
Question 2
,A nurse administers a medication that binds to receptors and
produces a maximal biological response. Which pharmacologic
property is best demonstrated?
A. Potency
B. Efficacy
C. Bioavailability
D. Clearance
Correct Answer: B
Rationale:
Efficacy refers to the maximum effect a drug can produce,
regardless of dose. Potency describes the amount of drug
required to produce a given effect. Bioavailability concerns the
fraction of administered drug reaching systemic circulation.
Clearance refers to the body's ability to eliminate the drug.
Question 3
A patient asks why two medications that treat the same
condition are prescribed at different doses. Which nursing
response is most accurate?
A. "The medication requiring the smaller dose is always safer."
B. "Drugs differ in potency, so different amounts may be needed
to achieve similar effects."
, C. "The higher-dose medication remains in the body for a
shorter time."
D. "Only generic medications require larger doses."
Correct Answer: B
Rationale:
Potency reflects the amount of drug needed to achieve a
specific effect. Two medications with equal efficacy may require
different doses because of differences in receptor affinity or
pharmacologic properties. A smaller dose does not
automatically mean greater safety. Duration of action and
generic status are unrelated to potency.
Question 4
A nurse reviews a prescription for a medication with a narrow
therapeutic index. Which action is most important?
A. Administer the medication without laboratory monitoring.
B. Double the dose if symptoms persist.
C. Monitor drug levels and assess for signs of toxicity.
D. Instruct the patient to stop the medication if one dose is
missed.
Correct Answer: C
Rationale:
CLINICAL PHARMACOLOGY
16TH EDITION
• AUTHOR(S)TODD W.
VANDERAH
TEST BANK
,Question 1
A nurse is teaching a community group about the stages of
medication development. Which statement by a participant
indicates correct understanding of a phase III clinical trial?
A. "The drug is first tested in laboratory animals to determine
toxicity."
B. "The medication is evaluated in a small group of healthy
volunteers for basic safety."
C. "The drug is compared with current treatments in a large
population to assess effectiveness and adverse effects."
D. "The medication is monitored only after it has been removed
from the market."
Correct Answer: C
Rationale:
Phase III trials involve large groups of participants and compare
a new treatment with existing therapies or placebo to evaluate
efficacy, safety, and common adverse effects before regulatory
approval. Option A describes preclinical testing. Option B
describes phase I trials. Option D does not reflect post-
marketing surveillance, which occurs after approval and not
after removal from the market.
Question 2
,A nurse administers a medication that binds to receptors and
produces a maximal biological response. Which pharmacologic
property is best demonstrated?
A. Potency
B. Efficacy
C. Bioavailability
D. Clearance
Correct Answer: B
Rationale:
Efficacy refers to the maximum effect a drug can produce,
regardless of dose. Potency describes the amount of drug
required to produce a given effect. Bioavailability concerns the
fraction of administered drug reaching systemic circulation.
Clearance refers to the body's ability to eliminate the drug.
Question 3
A patient asks why two medications that treat the same
condition are prescribed at different doses. Which nursing
response is most accurate?
A. "The medication requiring the smaller dose is always safer."
B. "Drugs differ in potency, so different amounts may be needed
to achieve similar effects."
, C. "The higher-dose medication remains in the body for a
shorter time."
D. "Only generic medications require larger doses."
Correct Answer: B
Rationale:
Potency reflects the amount of drug needed to achieve a
specific effect. Two medications with equal efficacy may require
different doses because of differences in receptor affinity or
pharmacologic properties. A smaller dose does not
automatically mean greater safety. Duration of action and
generic status are unrelated to potency.
Question 4
A nurse reviews a prescription for a medication with a narrow
therapeutic index. Which action is most important?
A. Administer the medication without laboratory monitoring.
B. Double the dose if symptoms persist.
C. Monitor drug levels and assess for signs of toxicity.
D. Instruct the patient to stop the medication if one dose is
missed.
Correct Answer: C
Rationale:
