NUR210 / NUR 210 Exam 3 — Principles of Pharmacology (2026/2027) Galen College of Nursing | A+ Guaranteed
NUR210 / NUR 210 Exam 3 (Latest 2026/2027)
Principles of Pharmacology — Tested Questions with Revised Correct Answers
Galen College of Nursing | 50 Questions | A+ Guarantee
Blueprint: Section 1: Pharmacokinetics (Q1–Q10) • Section 2: Pharmacodynamics (Q11–Q18) • Section 3:
Medication Administration & Calculations (Q19–Q26)
Blueprint (cont.): Section 4: Drug Classifications (Q27–Q36) • Section 5: Adverse Drug Reactions & Interactions
(Q37–Q44) • Section 6: Nursing Interventions & Patient Education (Q45–Q50)
Section 1: Principles of Pharmacology and Pharmacokinetics (Q1–Q10)
Absorption, Distribution, Metabolism, Excretion, Half-Life, Steady State, Bioavailability, Loading Dose, Therapeutic Index.
Q1: A nurse is preparing to administer an oral medication to a patient. The patient asks why oral
medications take longer to work than medications given by IV push. Which pharmacokinetic
process explains this delay?
Q2: A patient is prescribed a medication that has a high first-pass effect. The nurse correctly
understands that this medication will have:
A. High bioavailability when given orally
B. Low bioavailability when given orally, often requiring alternative routes or higher doses
[CORRECT]
C. No effect when given intravenously
D. Immediate onset of action when given orally
Correct Answer: B
Rationale: The first-pass effect occurs when oral medications are absorbed through the GI mucosa and
transported via the portal vein to the liver, where a significant portion is metabolized before reaching systemic
circulation. This reduces bioavailability (the fraction of active drug reaching systemic circulation), often
necessitating higher oral doses or alternative routes such as sublingual, IV, or transdermal. IV administration
bypasses first-pass metabolism entirely, achieving 100% bioavailability, which is why IV doses of the same drug
are typically much smaller than oral doses.
Q3: A patient with severe burns has decreased plasma protein levels. The nurse knows that this
will affect drug distribution by:
A. Decreasing the amount of free (active) drug in the bloodstream
B. Increasing the amount of bound (inactive) drug in the bloodstream
C. Increasing the amount of free (active) drug, potentially causing toxicity [CORRECT]
D. Having no effect on drug distribution
Correct Answer: C
Rationale: Many drugs bind to plasma proteins (primarily albumin), and only the free (unbound) fraction is
pharmacologically active. When plasma protein levels decrease—as seen in severe burns, malnutrition, liver
disease, or nephrotic syndrome—more drug remains unbound, raising the active drug concentration and
increasing the risk of toxicity. This is a critical distribution concept for highly protein-bound drugs such as
warfarin, phenytoin, and valproic acid, where the nurse must monitor for signs of overdose and anticipate dose
adjustments.
Revised Correct Answers with Rationales — For NUR210 Exam Preparation Only Page 1
, NUR210 / NUR 210 Exam 3 — Principles of Pharmacology (2026/2027) Galen College of Nursing | A+ Guaranteed
Q4: A medication has a half-life of 8 hours. The nurse understands that it will take approximately
how long for the drug to reach steady state?
A. 8 hours
B. 16 hours
C. 32–40 hours [CORRECT]
D. 80 hours
Correct Answer: C
Rationale: Steady state occurs when the amount of drug administered equals the amount eliminated per unit
time, and it is generally reached after 4–5 half-lives. With a half-life of 8 hours, steady state would be achieved
in approximately 32–40 hours (4–5 × 8). This principle guides clinicians in determining when to assess
therapeutic drug levels and when a loading dose might be needed to achieve rapid therapeutic concentrations,
especially for drugs with long half-lives that would otherwise take days to reach steady state.
Q5: A patient asks the nurse why a loading dose is prescribed for a medication with a long
half-life. The nurse's best response is:
A. "It reduces the risk of adverse effects."
B. "It allows the medication to reach therapeutic levels more quickly." [CORRECT]
C. "It prevents drug interactions."
D. "It prolongs the duration of action."
Correct Answer: B
Rationale: A loading dose is a higher initial dose used to rapidly achieve therapeutic plasma concentrations,
particularly for drugs with long half-lives that would otherwise require days to reach steady state. Once
therapeutic levels are achieved, a smaller maintenance dose sustains the level. This strategy is commonly used
for drugs such as digoxin, amiodarone, phenytoin, and antibiotics in serious infections. Loading doses require
careful monitoring because the higher initial dose increases the risk of toxicity, especially in patients with organ
impairment.
Q6: The nurse is preparing to administer digoxin, a medication with a narrow therapeutic index.
The nurse correctly understands that this means:
A. The drug has a wide safety margin between therapeutic and toxic doses
B. The drug requires close monitoring of serum drug levels and patient response [CORRECT]
C. The drug can be given safely at any dose
D. The drug does not require laboratory monitoring
Correct Answer: B
Rationale: The therapeutic index is the ratio of the toxic dose to the therapeutic dose. A narrow therapeutic
index (NTI) means the difference between therapeutic and toxic doses is small, requiring close monitoring of
serum drug levels and clinical response. Examples include digoxin, warfarin, lithium, and theophylline. The
nurse must monitor serum levels, assess for early signs of toxicity, verify dose calculations with a second nurse,
and educate patients on symptoms to report immediately.
Q7: A patient is receiving a medication metabolized by the CYP450 enzyme system. The nurse
knows that grapefruit juice can:
A. Increase CYP450 activity, decreasing drug effectiveness
B. Inhibit CYP450 enzymes, increasing drug levels and the risk of toxicity [CORRECT]
C. Have no effect on drug metabolism
D. Increase renal excretion of the drug
Correct Answer: B
Revised Correct Answers with Rationales — For NUR210 Exam Preparation Only Page 2
NUR210 / NUR 210 Exam 3 (Latest 2026/2027)
Principles of Pharmacology — Tested Questions with Revised Correct Answers
Galen College of Nursing | 50 Questions | A+ Guarantee
Blueprint: Section 1: Pharmacokinetics (Q1–Q10) • Section 2: Pharmacodynamics (Q11–Q18) • Section 3:
Medication Administration & Calculations (Q19–Q26)
Blueprint (cont.): Section 4: Drug Classifications (Q27–Q36) • Section 5: Adverse Drug Reactions & Interactions
(Q37–Q44) • Section 6: Nursing Interventions & Patient Education (Q45–Q50)
Section 1: Principles of Pharmacology and Pharmacokinetics (Q1–Q10)
Absorption, Distribution, Metabolism, Excretion, Half-Life, Steady State, Bioavailability, Loading Dose, Therapeutic Index.
Q1: A nurse is preparing to administer an oral medication to a patient. The patient asks why oral
medications take longer to work than medications given by IV push. Which pharmacokinetic
process explains this delay?
Q2: A patient is prescribed a medication that has a high first-pass effect. The nurse correctly
understands that this medication will have:
A. High bioavailability when given orally
B. Low bioavailability when given orally, often requiring alternative routes or higher doses
[CORRECT]
C. No effect when given intravenously
D. Immediate onset of action when given orally
Correct Answer: B
Rationale: The first-pass effect occurs when oral medications are absorbed through the GI mucosa and
transported via the portal vein to the liver, where a significant portion is metabolized before reaching systemic
circulation. This reduces bioavailability (the fraction of active drug reaching systemic circulation), often
necessitating higher oral doses or alternative routes such as sublingual, IV, or transdermal. IV administration
bypasses first-pass metabolism entirely, achieving 100% bioavailability, which is why IV doses of the same drug
are typically much smaller than oral doses.
Q3: A patient with severe burns has decreased plasma protein levels. The nurse knows that this
will affect drug distribution by:
A. Decreasing the amount of free (active) drug in the bloodstream
B. Increasing the amount of bound (inactive) drug in the bloodstream
C. Increasing the amount of free (active) drug, potentially causing toxicity [CORRECT]
D. Having no effect on drug distribution
Correct Answer: C
Rationale: Many drugs bind to plasma proteins (primarily albumin), and only the free (unbound) fraction is
pharmacologically active. When plasma protein levels decrease—as seen in severe burns, malnutrition, liver
disease, or nephrotic syndrome—more drug remains unbound, raising the active drug concentration and
increasing the risk of toxicity. This is a critical distribution concept for highly protein-bound drugs such as
warfarin, phenytoin, and valproic acid, where the nurse must monitor for signs of overdose and anticipate dose
adjustments.
Revised Correct Answers with Rationales — For NUR210 Exam Preparation Only Page 1
, NUR210 / NUR 210 Exam 3 — Principles of Pharmacology (2026/2027) Galen College of Nursing | A+ Guaranteed
Q4: A medication has a half-life of 8 hours. The nurse understands that it will take approximately
how long for the drug to reach steady state?
A. 8 hours
B. 16 hours
C. 32–40 hours [CORRECT]
D. 80 hours
Correct Answer: C
Rationale: Steady state occurs when the amount of drug administered equals the amount eliminated per unit
time, and it is generally reached after 4–5 half-lives. With a half-life of 8 hours, steady state would be achieved
in approximately 32–40 hours (4–5 × 8). This principle guides clinicians in determining when to assess
therapeutic drug levels and when a loading dose might be needed to achieve rapid therapeutic concentrations,
especially for drugs with long half-lives that would otherwise take days to reach steady state.
Q5: A patient asks the nurse why a loading dose is prescribed for a medication with a long
half-life. The nurse's best response is:
A. "It reduces the risk of adverse effects."
B. "It allows the medication to reach therapeutic levels more quickly." [CORRECT]
C. "It prevents drug interactions."
D. "It prolongs the duration of action."
Correct Answer: B
Rationale: A loading dose is a higher initial dose used to rapidly achieve therapeutic plasma concentrations,
particularly for drugs with long half-lives that would otherwise require days to reach steady state. Once
therapeutic levels are achieved, a smaller maintenance dose sustains the level. This strategy is commonly used
for drugs such as digoxin, amiodarone, phenytoin, and antibiotics in serious infections. Loading doses require
careful monitoring because the higher initial dose increases the risk of toxicity, especially in patients with organ
impairment.
Q6: The nurse is preparing to administer digoxin, a medication with a narrow therapeutic index.
The nurse correctly understands that this means:
A. The drug has a wide safety margin between therapeutic and toxic doses
B. The drug requires close monitoring of serum drug levels and patient response [CORRECT]
C. The drug can be given safely at any dose
D. The drug does not require laboratory monitoring
Correct Answer: B
Rationale: The therapeutic index is the ratio of the toxic dose to the therapeutic dose. A narrow therapeutic
index (NTI) means the difference between therapeutic and toxic doses is small, requiring close monitoring of
serum drug levels and clinical response. Examples include digoxin, warfarin, lithium, and theophylline. The
nurse must monitor serum levels, assess for early signs of toxicity, verify dose calculations with a second nurse,
and educate patients on symptoms to report immediately.
Q7: A patient is receiving a medication metabolized by the CYP450 enzyme system. The nurse
knows that grapefruit juice can:
A. Increase CYP450 activity, decreasing drug effectiveness
B. Inhibit CYP450 enzymes, increasing drug levels and the risk of toxicity [CORRECT]
C. Have no effect on drug metabolism
D. Increase renal excretion of the drug
Correct Answer: B
Revised Correct Answers with Rationales — For NUR210 Exam Preparation Only Page 2
