SOUTH UNIVERSITY | COLLEGE OF NURSING | GRADUATE NURSING PROGRAM
NSG6005 / NSG 6005
ADVANCED PHARMACOLOGY
WEEK 1 QUIZ
(LATEST ) SOUTH UNIVERSITY
Comprehensive Examination | 100 Questions | Sections 1-6 | Select ONE Best Answer (A-D) | Answers and Rationales Included
Aligned with the South University NSG 6005 Course Syllabus, the AACN Essentials of Master's Education in Nursing, and
Advanced Pharmacology Competencies (2026/2027 Edition).
Cognitive distribution: 25% recall | 50% application | 25% analysis, including clinical reasoning, medication calculations, and
patient-education scenarios. Recommended time: 150 minutes.
Section 1: Pharmacokinetics (Questions 1-20)
Absorption, distribution, metabolism, and excretion; bioavailability, the CYP450 system, half-life and steady state, therapeutic drug
monitoring, and pharmacokinetic variability across special populations. (Questions 1-20)
Q1. A graduate nursing student is reviewing core pharmacokinetic terminology during Week 1 of NSG 6005. Which
statement best defines bioavailability?
A. The percentage of an administered dose that remains unbound in the plasma
B. The rate at which a drug is eliminated from the systemic circulation
C. The fraction of an administered dose of drug that reaches the systemic circulation unchanged *[CORRECT]*
D. The amount of drug required to produce 50 percent of the maximal therapeutic effect
Correct Answer: C
Rationale: Bioavailability is the fraction of the administered dose that reaches systemic circulation intact; by definition,
intravenous administration provides 100 percent bioavailability, a foundational NSG 6005 pharmacokinetic principle.
Option A describes the free (unbound) fraction, option B describes clearance, and option D defines ED50, a potency
measure from pharmacodynamics. Confusing these terms is a common examination trap because all four describe 'how
much drug is where.'
Q2. A patient with stable angina asks the nurse practitioner why sublingual nitroglycerin is preferred over an oral tablet
for acute episodes. Which pharmacokinetic principle best explains this prescribing choice?
A. Sublingual absorption avoids hepatic first-pass metabolism that extensively degrades orally administered
nitroglycerin *[CORRECT]*
B. Sublingual administration completely bypasses all biologic membranes, producing instantaneous absorption
C. Oral nitroglycerin undergoes complete malabsorption in the gastrointestinal tract
D. Sublingual administration increases the protein binding of nitroglycerin, which prolongs its duration of action
Correct Answer: A
Rationale: Nitroglycerin undergoes extensive first-pass metabolism when swallowed, so the sublingual route drains
through the superior vena cava directly into the systemic circulation and bypasses the portal vein. Sublingual drug still
crosses mucosal membranes, so option B is incorrect, and the drug is well absorbed orally but metabolized before reaching
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 1
,NSG6005 / NSG 6005: Advanced Pharmacology - Week 1 Quiz (Latest ) South University
the systemic circulation, which eliminates option C. Protein binding is route independent, making option D a distractor.
Q3. A patient begins levofloxacin 500 mg IV every 24 hours for pneumonia. The pharmacist notes the drug has a
half-life of approximately 8 hours in this patient. Approximately when will the drug reach steady-state plasma
concentration?
A. Immediately, with the first intravenous dose
B. About 8 hours after the first dose
C. About 16 hours after the first dose
D. About 32 to 40 hours after the first dose, which corresponds to 4 to 5 half-lives *[CORRECT]*
Correct Answer: D
Rationale: Steady state is achieved after approximately 4 to 5 half-lives regardless of dose size or route, so 8 hours
multiplied by 4 to 5 gives roughly 32 to 40 hours; this calculation is a required NSG 6005 medication-math competency.
Options A through C understate the time needed because each successive dose accumulates until the amount administered
equals the amount eliminated. A loading dose can raise levels sooner, but true steady state still requires 4 to 5 half-lives.
Q4. A 78-year-old patient with hypoalbuminemia (albumin 2.1 g/dL) takes phenytoin for seizure control. The total
serum phenytoin concentration is 8 mcg/mL (reference therapeutic range 10 to 20 mcg/mL), yet the patient is ataxic
and demonstrates nystagmus. Which explanation best accounts for these findings?
A. The patient needs a higher phenytoin dose because the total level is below the therapeutic range
B. Hypoalbuminemia increases the free (unbound) fraction of phenytoin, so toxicity occurs even though the total
level appears low *[CORRECT]*
C. Phenytoin has minimal protein binding, so total levels are always unreliable in older adults
D. Ataxia and nystagmus indicate a hypersensitivity reaction, and all antiseizure drugs must be stopped
immediately
Correct Answer: B
Rationale: Phenytoin is approximately 90 percent protein bound, and only the free fraction is pharmacologically active;
with low albumin, more drug circulates free, producing toxicity while the total measured level falsely suggests underdosing.
Increasing the dose (option A) would worsen neurotoxicity. Option C inverts the fact that phenytoin is highly bound, and
option D mislabels classic dose-dependent cerebellar toxicity as allergy. This scenario reflects the NSG 6005 distribution
principle that only unbound drug crosses membranes and exerts effects.
Q5. Which statement accurately describes the clinical meaning of the apparent volume of distribution (Vd)?
A. Vd is the actual anatomic space that a drug physically occupies in the body
B. A low Vd indicates extensive sequestration of the drug within adipose tissue
C. Vd is a calculated ratio of the amount of drug in the body to the plasma concentration, reflecting the extent of
tissue distribution *[CORRECT]*
D. Drugs with a high Vd remain confined to the vascular compartment and are poor choices for intracellular
infections
Correct Answer: C
Rationale: Vd is a hypothetical calculated value (dose divided by plasma concentration) that links the dose in the body to
the measured concentration; a high Vd, as with amiodarone or digoxin, signals extensive tissue binding, which is central to
NSG 6005 dosing logic. It is not a true anatomic volume, which eliminates option A. Option B and option D both reverse
the relationship: high Vd indicates tissue sequestration, while low Vd suggests the drug stays within plasma or extracellular
fluid.
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 2
,NSG6005 / NSG 6005: Advanced Pharmacology - Week 1 Quiz (Latest ) South University
Q6. A patient with bacterial meningitis is prescribed high-dose IV ceftriaxone. The nurse practitioner explains that this
hydrophilic beta-lactam achieves therapeutic cerebrospinal fluid concentrations in this condition because of which
mechanism?
A. Inflammation of the meninges increases blood-brain barrier permeability, allowing the antibiotic to enter the
central nervous system *[CORRECT]*
B. Ceftriaxone is highly lipophilic and crosses the intact blood-brain barrier freely at any time
C. The blood-brain barrier is completely absent in adults with any systemic infection
D. Ceftriaxone undergoes active biliary transport that creates a gradient drawing the drug into cerebrospinal fluid
Correct Answer: A
Rationale: The intact blood-brain barrier with its tight junctions excludes most hydrophilic drugs, but meningeal
inflammation opens these junctions enough to permit beta-lactam penetration, a key NSG 6005 distribution concept.
Option B is wrong because ceftriaxone is water soluble, not lipophilic. Option C overstates the effect, since the barrier
remains partially functional, and option D describes nonexistent physiology.
Q7. A 32-year-old woman with newly diagnosed latent tuberculosis is started on rifampin. She takes a combined oral
contraceptive and asks whether she must change her birth control. What is the nurse practitioner's best response?
A. No interaction exists because rifampin affects only antibiotic levels
B. Take the contraceptive with grapefruit juice to block its intestinal metabolism
C. Double the contraceptive dose for the first week and then resume the usual dose
D. Use a reliable nonhormonal backup method, because rifampin induces hepatic CYP450 enzymes and can
reduce hormonal contraceptive effectiveness *[CORRECT]*
Correct Answer: D
Rationale: Rifampin is one of the most potent CYP450 enzyme inducers (notably CYP3A4 and 2C9) and also induces
glucuronyltransferases, lowering estrogen and progestin levels enough to cause breakthrough ovulation and contraceptive
failure; induction persists for days to weeks, so a one-week dose doubling is inadequate. Grapefruit juice is an enzyme
inhibitor, not an inducer, making option B both ineffective and reversed in logic. This enzyme-induction principle is a
heavily tested NSG 6005 pharmacokinetic interaction concept.
Q8. A patient who drinks grapefruit juice daily takes felodipine for hypertension and reports dizziness, flushing, and
near-syncope. Blood pressure is 88/54 mm Hg. Which mechanism best explains this presentation?
A. Grapefruit juice induces CYP3A4, accelerating felodipine clearance
B. Grapefruit juice inhibits intestinal CYP3A4, increasing felodipine bioavailability and causing excessive
hypotension *[CORRECT]*
C. Grapefruit juice displaces felodipine from albumin binding sites
D. Grapefruit juice acidifies the urine and slows renal elimination of felodipine
Correct Answer: B
Rationale: Furanocoumarins in grapefruit juice irreversibly inhibit CYP3A4 in the enterocyte wall, so more intact
felodipine is absorbed, bioavailability rises, and calcium channel blockade intensifies. The effect is metabolic inhibition,
not induction (option A), and felodipine elimination is hepatic, not renal (option D). Displacement interactions (option C)
typically alter highly protein-bound drugs acutely, which does not apply here; this is a classic NSG 6005 first-pass and
metabolism interaction scenario.
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 3
, NSG6005 / NSG 6005: Advanced Pharmacology - Week 1 Quiz (Latest ) South University
Q9. During Week 1 review of hepatic drug metabolism, which pairing of metabolic phase with its defining feature is
correct?
A. Phase II reactions always precede phase I reactions and activate prodrugs through oxidation
B. Phase I reactions conjugate drugs with glucuronic acid to form large, usually inactive complexes
C. Phase I reactions modify drugs through oxidation, reduction, or hydrolysis, largely via the CYP450 system,
whereas phase II reactions attach polar conjugates such as glucuronic acid *[CORRECT]*
D. Both phase I and phase II reactions occur exclusively within renal tubular epithelial cells
Correct Answer: C
Rationale: Phase I reactions (oxidation, reduction, hydrolysis) introduce or expose functional groups through CYP450
enzymes, most abundantly CYP3A4, while phase II conjugation (glucuronidation, sulfation, acetylation) attaches polar
groups to create water-soluble products for excretion. Option A reverses the usual sequence and misassigns oxidation,
option B describes phase II not phase I, and option D is anatomically incorrect because these reactions occur primarily in
hepatic smooth endoplasmic reticulum and cytosol.
Q10. A patient with rheumatoid arthritis on weekly low-dose oral methotrexate begins taking high-dose ibuprofen
daily. Over 2 weeks the patient develops stomatitis, fatigue, and cytopenias consistent with rising methotrexate
exposure. Which pharmacokinetic mechanism explains this interaction?
A. NSAID inhibition of renal tubular secretion decreases methotrexate clearance *[CORRECT]*
B. NSAIDs increase the glomerular filtration rate, which paradoxically increases methotrexate reabsorption
C. NSAIDs induce hepatic CYP2D6, increasing conversion of methotrexate to toxic metabolites
D. NSAIDs alkalinize the urine, trapping methotrexate ions in the tubular lumen
Correct Answer: A
Rationale: Methotrexate is cleared predominantly by the kidney, and NSAIDs compete with it for organic anion
transporters in the proximal tubule while also reducing renal blood flow, so levels rise and toxicity emerges; recognizing
competition at tubular secretion sites is a required NSG 6005 excretion concept. Methotrexate is not primarily CYP2D6
metabolized (option C), and urinary alkalinization actually enhances salicylate and methotrexate elimination rather than
trapping it (option D).
Q11. A patient with new-onset atrial fibrillation is prescribed an oral digoxin loading dose followed by daily
maintenance therapy. Digoxin's half-life is approximately 36 hours. What is the primary rationale for giving a loading
dose?
A. A loading dose compensates for the extensive first-pass metabolism of digoxin
B. A loading dose reduces the risk of digoxin toxicity during the first week of therapy
C. A loading dose saturates renal tubular secretion and prevents further drug accumulation
D. A loading dose rapidly achieves therapeutic concentrations because steady state with a long half-life would
otherwise take about one week *[CORRECT]*
Correct Answer: D
Rationale: With a 36-hour half-life, steady state would require roughly 6 to 8 days of maintenance dosing alone,
unacceptable when rate control is needed promptly; the loading dose fills the volume of distribution to reach the target
concentration immediately. A loading dose actually increases early toxicity risk (option B), and digoxin's modest first-pass
effect is unrelated (option A). Saturation of tubular secretion (option C) is a pharmacokinetic myth distractor.
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 4
NSG6005 / NSG 6005
ADVANCED PHARMACOLOGY
WEEK 1 QUIZ
(LATEST ) SOUTH UNIVERSITY
Comprehensive Examination | 100 Questions | Sections 1-6 | Select ONE Best Answer (A-D) | Answers and Rationales Included
Aligned with the South University NSG 6005 Course Syllabus, the AACN Essentials of Master's Education in Nursing, and
Advanced Pharmacology Competencies (2026/2027 Edition).
Cognitive distribution: 25% recall | 50% application | 25% analysis, including clinical reasoning, medication calculations, and
patient-education scenarios. Recommended time: 150 minutes.
Section 1: Pharmacokinetics (Questions 1-20)
Absorption, distribution, metabolism, and excretion; bioavailability, the CYP450 system, half-life and steady state, therapeutic drug
monitoring, and pharmacokinetic variability across special populations. (Questions 1-20)
Q1. A graduate nursing student is reviewing core pharmacokinetic terminology during Week 1 of NSG 6005. Which
statement best defines bioavailability?
A. The percentage of an administered dose that remains unbound in the plasma
B. The rate at which a drug is eliminated from the systemic circulation
C. The fraction of an administered dose of drug that reaches the systemic circulation unchanged *[CORRECT]*
D. The amount of drug required to produce 50 percent of the maximal therapeutic effect
Correct Answer: C
Rationale: Bioavailability is the fraction of the administered dose that reaches systemic circulation intact; by definition,
intravenous administration provides 100 percent bioavailability, a foundational NSG 6005 pharmacokinetic principle.
Option A describes the free (unbound) fraction, option B describes clearance, and option D defines ED50, a potency
measure from pharmacodynamics. Confusing these terms is a common examination trap because all four describe 'how
much drug is where.'
Q2. A patient with stable angina asks the nurse practitioner why sublingual nitroglycerin is preferred over an oral tablet
for acute episodes. Which pharmacokinetic principle best explains this prescribing choice?
A. Sublingual absorption avoids hepatic first-pass metabolism that extensively degrades orally administered
nitroglycerin *[CORRECT]*
B. Sublingual administration completely bypasses all biologic membranes, producing instantaneous absorption
C. Oral nitroglycerin undergoes complete malabsorption in the gastrointestinal tract
D. Sublingual administration increases the protein binding of nitroglycerin, which prolongs its duration of action
Correct Answer: A
Rationale: Nitroglycerin undergoes extensive first-pass metabolism when swallowed, so the sublingual route drains
through the superior vena cava directly into the systemic circulation and bypasses the portal vein. Sublingual drug still
crosses mucosal membranes, so option B is incorrect, and the drug is well absorbed orally but metabolized before reaching
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 1
,NSG6005 / NSG 6005: Advanced Pharmacology - Week 1 Quiz (Latest ) South University
the systemic circulation, which eliminates option C. Protein binding is route independent, making option D a distractor.
Q3. A patient begins levofloxacin 500 mg IV every 24 hours for pneumonia. The pharmacist notes the drug has a
half-life of approximately 8 hours in this patient. Approximately when will the drug reach steady-state plasma
concentration?
A. Immediately, with the first intravenous dose
B. About 8 hours after the first dose
C. About 16 hours after the first dose
D. About 32 to 40 hours after the first dose, which corresponds to 4 to 5 half-lives *[CORRECT]*
Correct Answer: D
Rationale: Steady state is achieved after approximately 4 to 5 half-lives regardless of dose size or route, so 8 hours
multiplied by 4 to 5 gives roughly 32 to 40 hours; this calculation is a required NSG 6005 medication-math competency.
Options A through C understate the time needed because each successive dose accumulates until the amount administered
equals the amount eliminated. A loading dose can raise levels sooner, but true steady state still requires 4 to 5 half-lives.
Q4. A 78-year-old patient with hypoalbuminemia (albumin 2.1 g/dL) takes phenytoin for seizure control. The total
serum phenytoin concentration is 8 mcg/mL (reference therapeutic range 10 to 20 mcg/mL), yet the patient is ataxic
and demonstrates nystagmus. Which explanation best accounts for these findings?
A. The patient needs a higher phenytoin dose because the total level is below the therapeutic range
B. Hypoalbuminemia increases the free (unbound) fraction of phenytoin, so toxicity occurs even though the total
level appears low *[CORRECT]*
C. Phenytoin has minimal protein binding, so total levels are always unreliable in older adults
D. Ataxia and nystagmus indicate a hypersensitivity reaction, and all antiseizure drugs must be stopped
immediately
Correct Answer: B
Rationale: Phenytoin is approximately 90 percent protein bound, and only the free fraction is pharmacologically active;
with low albumin, more drug circulates free, producing toxicity while the total measured level falsely suggests underdosing.
Increasing the dose (option A) would worsen neurotoxicity. Option C inverts the fact that phenytoin is highly bound, and
option D mislabels classic dose-dependent cerebellar toxicity as allergy. This scenario reflects the NSG 6005 distribution
principle that only unbound drug crosses membranes and exerts effects.
Q5. Which statement accurately describes the clinical meaning of the apparent volume of distribution (Vd)?
A. Vd is the actual anatomic space that a drug physically occupies in the body
B. A low Vd indicates extensive sequestration of the drug within adipose tissue
C. Vd is a calculated ratio of the amount of drug in the body to the plasma concentration, reflecting the extent of
tissue distribution *[CORRECT]*
D. Drugs with a high Vd remain confined to the vascular compartment and are poor choices for intracellular
infections
Correct Answer: C
Rationale: Vd is a hypothetical calculated value (dose divided by plasma concentration) that links the dose in the body to
the measured concentration; a high Vd, as with amiodarone or digoxin, signals extensive tissue binding, which is central to
NSG 6005 dosing logic. It is not a true anatomic volume, which eliminates option A. Option B and option D both reverse
the relationship: high Vd indicates tissue sequestration, while low Vd suggests the drug stays within plasma or extracellular
fluid.
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 2
,NSG6005 / NSG 6005: Advanced Pharmacology - Week 1 Quiz (Latest ) South University
Q6. A patient with bacterial meningitis is prescribed high-dose IV ceftriaxone. The nurse practitioner explains that this
hydrophilic beta-lactam achieves therapeutic cerebrospinal fluid concentrations in this condition because of which
mechanism?
A. Inflammation of the meninges increases blood-brain barrier permeability, allowing the antibiotic to enter the
central nervous system *[CORRECT]*
B. Ceftriaxone is highly lipophilic and crosses the intact blood-brain barrier freely at any time
C. The blood-brain barrier is completely absent in adults with any systemic infection
D. Ceftriaxone undergoes active biliary transport that creates a gradient drawing the drug into cerebrospinal fluid
Correct Answer: A
Rationale: The intact blood-brain barrier with its tight junctions excludes most hydrophilic drugs, but meningeal
inflammation opens these junctions enough to permit beta-lactam penetration, a key NSG 6005 distribution concept.
Option B is wrong because ceftriaxone is water soluble, not lipophilic. Option C overstates the effect, since the barrier
remains partially functional, and option D describes nonexistent physiology.
Q7. A 32-year-old woman with newly diagnosed latent tuberculosis is started on rifampin. She takes a combined oral
contraceptive and asks whether she must change her birth control. What is the nurse practitioner's best response?
A. No interaction exists because rifampin affects only antibiotic levels
B. Take the contraceptive with grapefruit juice to block its intestinal metabolism
C. Double the contraceptive dose for the first week and then resume the usual dose
D. Use a reliable nonhormonal backup method, because rifampin induces hepatic CYP450 enzymes and can
reduce hormonal contraceptive effectiveness *[CORRECT]*
Correct Answer: D
Rationale: Rifampin is one of the most potent CYP450 enzyme inducers (notably CYP3A4 and 2C9) and also induces
glucuronyltransferases, lowering estrogen and progestin levels enough to cause breakthrough ovulation and contraceptive
failure; induction persists for days to weeks, so a one-week dose doubling is inadequate. Grapefruit juice is an enzyme
inhibitor, not an inducer, making option B both ineffective and reversed in logic. This enzyme-induction principle is a
heavily tested NSG 6005 pharmacokinetic interaction concept.
Q8. A patient who drinks grapefruit juice daily takes felodipine for hypertension and reports dizziness, flushing, and
near-syncope. Blood pressure is 88/54 mm Hg. Which mechanism best explains this presentation?
A. Grapefruit juice induces CYP3A4, accelerating felodipine clearance
B. Grapefruit juice inhibits intestinal CYP3A4, increasing felodipine bioavailability and causing excessive
hypotension *[CORRECT]*
C. Grapefruit juice displaces felodipine from albumin binding sites
D. Grapefruit juice acidifies the urine and slows renal elimination of felodipine
Correct Answer: B
Rationale: Furanocoumarins in grapefruit juice irreversibly inhibit CYP3A4 in the enterocyte wall, so more intact
felodipine is absorbed, bioavailability rises, and calcium channel blockade intensifies. The effect is metabolic inhibition,
not induction (option A), and felodipine elimination is hepatic, not renal (option D). Displacement interactions (option C)
typically alter highly protein-bound drugs acutely, which does not apply here; this is a classic NSG 6005 first-pass and
metabolism interaction scenario.
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 3
, NSG6005 / NSG 6005: Advanced Pharmacology - Week 1 Quiz (Latest ) South University
Q9. During Week 1 review of hepatic drug metabolism, which pairing of metabolic phase with its defining feature is
correct?
A. Phase II reactions always precede phase I reactions and activate prodrugs through oxidation
B. Phase I reactions conjugate drugs with glucuronic acid to form large, usually inactive complexes
C. Phase I reactions modify drugs through oxidation, reduction, or hydrolysis, largely via the CYP450 system,
whereas phase II reactions attach polar conjugates such as glucuronic acid *[CORRECT]*
D. Both phase I and phase II reactions occur exclusively within renal tubular epithelial cells
Correct Answer: C
Rationale: Phase I reactions (oxidation, reduction, hydrolysis) introduce or expose functional groups through CYP450
enzymes, most abundantly CYP3A4, while phase II conjugation (glucuronidation, sulfation, acetylation) attaches polar
groups to create water-soluble products for excretion. Option A reverses the usual sequence and misassigns oxidation,
option B describes phase II not phase I, and option D is anatomically incorrect because these reactions occur primarily in
hepatic smooth endoplasmic reticulum and cytosol.
Q10. A patient with rheumatoid arthritis on weekly low-dose oral methotrexate begins taking high-dose ibuprofen
daily. Over 2 weeks the patient develops stomatitis, fatigue, and cytopenias consistent with rising methotrexate
exposure. Which pharmacokinetic mechanism explains this interaction?
A. NSAID inhibition of renal tubular secretion decreases methotrexate clearance *[CORRECT]*
B. NSAIDs increase the glomerular filtration rate, which paradoxically increases methotrexate reabsorption
C. NSAIDs induce hepatic CYP2D6, increasing conversion of methotrexate to toxic metabolites
D. NSAIDs alkalinize the urine, trapping methotrexate ions in the tubular lumen
Correct Answer: A
Rationale: Methotrexate is cleared predominantly by the kidney, and NSAIDs compete with it for organic anion
transporters in the proximal tubule while also reducing renal blood flow, so levels rise and toxicity emerges; recognizing
competition at tubular secretion sites is a required NSG 6005 excretion concept. Methotrexate is not primarily CYP2D6
metabolized (option C), and urinary alkalinization actually enhances salicylate and methotrexate elimination rather than
trapping it (option D).
Q11. A patient with new-onset atrial fibrillation is prescribed an oral digoxin loading dose followed by daily
maintenance therapy. Digoxin's half-life is approximately 36 hours. What is the primary rationale for giving a loading
dose?
A. A loading dose compensates for the extensive first-pass metabolism of digoxin
B. A loading dose reduces the risk of digoxin toxicity during the first week of therapy
C. A loading dose saturates renal tubular secretion and prevents further drug accumulation
D. A loading dose rapidly achieves therapeutic concentrations because steady state with a long half-life would
otherwise take about one week *[CORRECT]*
Correct Answer: D
Rationale: With a 36-hour half-life, steady state would require roughly 6 to 8 days of maintenance dosing alone,
unacceptable when rate control is needed promptly; the loading dose fills the volume of distribution to reach the target
concentration immediately. A loading dose actually increases early toxicity risk (option B), and digoxin's modest first-pass
effect is unrelated (option A). Saturation of tubular secretion (option C) is a pharmacokinetic myth distractor.
NSG 6005 Advanced Pharmacology | Week 1 Quiz | South University Page 4
