NURS 5334 Advanced Pharmacology Comprehensive Final Exam |
Questions and Answers + Rationales | 2026/27 Updates | 100% Correct |
UTA
According to the NURS 5334 curriculum, which of the following describes the pharmacodynamic
action of an antagonist?
A) Produces receptor stimulation and a conformational change upon binding.
B) Has affinity for a receptor but no intrinsic activity, blocking receptor activation.
C) Stimulates only some of the receptors, producing a submaximal effect.
D) Binds to a receptor to produce a response that is opposite to an agonist.
Correct Answer: Has affinity for a receptor but no intrinsic activity, blocking receptor activation.
Rationale: An antagonist has affinity for a receptor but lacks intrinsic activity, which allows it to
bind and block the action of agonists without producing a response . A full agonist produces
stimulation, a partial agonist produces a submaximal effect, and an inverse agonist produces an
opposite effect.
A patient with cirrhosis is prescribed a medication that is highly metabolized by the liver. What
is the most appropriate dose adjustment?
A) Increase the dose to overcome decreased metabolism.
B) Reduce the dose or prolong the dosing interval.
C) Maintain the standard dose but monitor for toxicity.
D) Administer the drug via a different route only.
Correct Answer: Reduce the dose or prolong the dosing interval.
,Rationale: In cirrhosis, impaired hepatic metabolism can lead to drug accumulation and toxicity .
Reducing the dose or prolonging the interval prevents excessive drug levels, while increasing the
dose would worsen toxicity.
A drug has a half-life of 6 hours. Approximately how many hours will it take for the drug to reach
a steady-state concentration with regular dosing?
A) 6 hours
B) 12 hours
C) 24 hours
D) 30 hours
Correct Answer: 30 hours
Rationale: Steady-state is reached after approximately 4-5 half-lives . Five multiplied by 6 hours
equals 30 hours. This principle is crucial for predicting when a drug will achieve its full
therapeutic effect.
What is the first-pass effect, and which route bypasses it entirely?
A) The metabolism of a drug in the kidneys before it reaches systemic circulation; avoided by
oral administration.
B) The extensive metabolism of an oral drug in the liver before it reaches systemic circulation;
avoided by the sublingual route.
C) The binding of a drug to plasma proteins, reducing its active concentration; avoided by IV
administration.
D) The excretion of a drug in the bile before it is absorbed; avoided by the intramuscular route.
Correct Answer: The extensive metabolism of an oral drug in the liver before it reaches systemic
circulation; avoided by the sublingual route.
,Rationale: The first-pass effect is the hepatic metabolism of an orally administered drug before
it enters systemic circulation, reducing its bioavailability . Sublingual, IV, transdermal, and rectal
routes bypass this effect .
Which of the following is the primary mechanism of action of penicillin?
A) Inhibits protein synthesis by binding to the 50S ribosomal subunit.
B) Inhibits cell wall synthesis, causing bacteria to take up water and rupture.
C) Inhibits DNA synthesis by binding to nucleic acids.
D) Inhibits folic acid synthesis by competing with PABA.
Correct Answer: Inhibits cell wall synthesis, causing bacteria to take up water and rupture.
Rationale: Penicillin is a beta-lactam antibiotic that weakens the bacterial cell wall, leading to
osmotic lysis . This mechanism makes it bactericidal and effective against gram-positive
organisms.
A patient with a penicillin allergy that resulted in anaphylaxis should avoid which class of
antibiotics due to the risk of cross-reactivity?
A) Macrolides
B) Cephalosporins
C) Fluoroquinolones
D) Sulfonamides
Correct Answer: Cephalosporins
Rationale: Cephalosporins are generally avoided in patients who have experienced anaphylaxis
from penicillin due to a risk of cross-reactivity . Macrolides and fluoroquinolones are safer
alternatives for patients with severe penicillin allergies.
, Which generation of cephalosporins is the preferred class for treating meningitis due to its
ability to penetrate the blood-brain barrier?
A) First generation
B) Second generation
C) Third generation
D) Fourth generation
Correct Answer: Third generation
Rationale: Third-generation cephalosporins penetrate spinal fluid and have good Gram-negative
coverage, making them the preferred class for treating meningitis . First and second-generation
agents are rarely used for active infection.
Which antibiotic is associated with "red man syndrome," and what is the most appropriate
intervention?
A) Vancomycin; slow the infusion rate.
B) Gentamicin; monitor renal function.
C) Ciprofloxacin; check for tendon pain.
D) Doxycycline; avoid sun exposure.
Correct Answer: Vancomycin; slow the infusion rate.
Rationale: Vancomycin can cause red man syndrome, a histamine-release reaction characterized
by flushing and pruritus, often related to rapid infusion rate . Slowing the infusion can prevent
this reaction.
Questions and Answers + Rationales | 2026/27 Updates | 100% Correct |
UTA
According to the NURS 5334 curriculum, which of the following describes the pharmacodynamic
action of an antagonist?
A) Produces receptor stimulation and a conformational change upon binding.
B) Has affinity for a receptor but no intrinsic activity, blocking receptor activation.
C) Stimulates only some of the receptors, producing a submaximal effect.
D) Binds to a receptor to produce a response that is opposite to an agonist.
Correct Answer: Has affinity for a receptor but no intrinsic activity, blocking receptor activation.
Rationale: An antagonist has affinity for a receptor but lacks intrinsic activity, which allows it to
bind and block the action of agonists without producing a response . A full agonist produces
stimulation, a partial agonist produces a submaximal effect, and an inverse agonist produces an
opposite effect.
A patient with cirrhosis is prescribed a medication that is highly metabolized by the liver. What
is the most appropriate dose adjustment?
A) Increase the dose to overcome decreased metabolism.
B) Reduce the dose or prolong the dosing interval.
C) Maintain the standard dose but monitor for toxicity.
D) Administer the drug via a different route only.
Correct Answer: Reduce the dose or prolong the dosing interval.
,Rationale: In cirrhosis, impaired hepatic metabolism can lead to drug accumulation and toxicity .
Reducing the dose or prolonging the interval prevents excessive drug levels, while increasing the
dose would worsen toxicity.
A drug has a half-life of 6 hours. Approximately how many hours will it take for the drug to reach
a steady-state concentration with regular dosing?
A) 6 hours
B) 12 hours
C) 24 hours
D) 30 hours
Correct Answer: 30 hours
Rationale: Steady-state is reached after approximately 4-5 half-lives . Five multiplied by 6 hours
equals 30 hours. This principle is crucial for predicting when a drug will achieve its full
therapeutic effect.
What is the first-pass effect, and which route bypasses it entirely?
A) The metabolism of a drug in the kidneys before it reaches systemic circulation; avoided by
oral administration.
B) The extensive metabolism of an oral drug in the liver before it reaches systemic circulation;
avoided by the sublingual route.
C) The binding of a drug to plasma proteins, reducing its active concentration; avoided by IV
administration.
D) The excretion of a drug in the bile before it is absorbed; avoided by the intramuscular route.
Correct Answer: The extensive metabolism of an oral drug in the liver before it reaches systemic
circulation; avoided by the sublingual route.
,Rationale: The first-pass effect is the hepatic metabolism of an orally administered drug before
it enters systemic circulation, reducing its bioavailability . Sublingual, IV, transdermal, and rectal
routes bypass this effect .
Which of the following is the primary mechanism of action of penicillin?
A) Inhibits protein synthesis by binding to the 50S ribosomal subunit.
B) Inhibits cell wall synthesis, causing bacteria to take up water and rupture.
C) Inhibits DNA synthesis by binding to nucleic acids.
D) Inhibits folic acid synthesis by competing with PABA.
Correct Answer: Inhibits cell wall synthesis, causing bacteria to take up water and rupture.
Rationale: Penicillin is a beta-lactam antibiotic that weakens the bacterial cell wall, leading to
osmotic lysis . This mechanism makes it bactericidal and effective against gram-positive
organisms.
A patient with a penicillin allergy that resulted in anaphylaxis should avoid which class of
antibiotics due to the risk of cross-reactivity?
A) Macrolides
B) Cephalosporins
C) Fluoroquinolones
D) Sulfonamides
Correct Answer: Cephalosporins
Rationale: Cephalosporins are generally avoided in patients who have experienced anaphylaxis
from penicillin due to a risk of cross-reactivity . Macrolides and fluoroquinolones are safer
alternatives for patients with severe penicillin allergies.
, Which generation of cephalosporins is the preferred class for treating meningitis due to its
ability to penetrate the blood-brain barrier?
A) First generation
B) Second generation
C) Third generation
D) Fourth generation
Correct Answer: Third generation
Rationale: Third-generation cephalosporins penetrate spinal fluid and have good Gram-negative
coverage, making them the preferred class for treating meningitis . First and second-generation
agents are rarely used for active infection.
Which antibiotic is associated with "red man syndrome," and what is the most appropriate
intervention?
A) Vancomycin; slow the infusion rate.
B) Gentamicin; monitor renal function.
C) Ciprofloxacin; check for tendon pain.
D) Doxycycline; avoid sun exposure.
Correct Answer: Vancomycin; slow the infusion rate.
Rationale: Vancomycin can cause red man syndrome, a histamine-release reaction characterized
by flushing and pruritus, often related to rapid infusion rate . Slowing the infusion can prevent
this reaction.
