NUR210 Exam 3: Principles of Pharmacology Galen College of Nursing | 2025-2026
NUR210 / NUR 210 Exam 3 (Latest )
Principles of Pharmacology Tested Questions
with Revised Correct Answers
Institution: Galen College of Nursing
Course: NUR210 - Principles of Pharmacology
Total Questions: 50 Multiple Choice (A-D)
Content Coverage: Pharmacokinetics, Pharmacodynamics, Medication Administration, Drug Classifications, ADR and
Drug Interactions, Nursing Interventions
Cognitive Levels: 30% Recall, 50% Application, 20% Analysis
Section 1: Principles of Pharmacology and Pharmacokinetics (Q1 - Q10)
Topics: Absorption, Distribution, Metabolism, Excretion, Half-Life, Steady State, Bioavailability, Loading Dose,
Maintenance Dose, Therapeutic Index
Q1: A nurse is administering an oral medication to a client. The nurse understands that the first-pass
effect refers to which process?
A. The drug is metabolized in the liver before reaching systemic circulation, reducing bioavailability
B. The drug is distributed rapidly to highly perfused organs such as the brain and heart
C. The drug is excreted primarily by the kidneys through glomerular filtration
D. The drug is absorbed through the gastric mucosa directly into the portal vein
Correct Answer: A
Rationale: The first-pass effect occurs when orally administered drugs are absorbed through the
gastrointestinal tract and transported via the portal vein to the liver, where they undergo significant
metabolism before entering systemic circulation. This process substantially reduces the bioavailability of
many drugs, which is why some medications (e.g., nitroglycerin) must be given via sublingual or transdermal
routes to bypass hepatic first-pass metabolism. Distribution to organs (B) is a separate pharmacokinetic
phase. Renal excretion (C) is the primary elimination route, not first-pass metabolism. While gastric
absorption (D) does occur, it is the subsequent hepatic metabolism that defines the first-pass effect.
Q2: A client is prescribed a drug with a half-life of 12 hours. Approximately how long will it take for the
drug to reach steady-state concentration?
A. 12 hours
B. 24 hours
C. 48 to 60 hours
D. 120 hours
Correct Answer: C
Rationale: Steady state is achieved when the rate of drug administration equals the rate of elimination,
typically requiring four to five half-lives. With a half-life of 12 hours, four half-lives equals 48 hours and five
half-lives equals 60 hours, so steady state is reached in approximately 48 to 60 hours. One half-life (A) only
reduces the concentration by 50%. Two half-lives or 24 hours (B) reaches only 75% of steady state. Five full
days (D) would be 10 half-lives, which far exceeds the requirement and is not clinically necessary to achieve
steady-state concentration.
1
,NUR210 Exam 3: Principles of Pharmacology Galen College of Nursing | 2025-2026
Q3: A nurse is reviewing a medication that has a narrow therapeutic index. Which of the following is the
most important nursing intervention?
A. Administer the medication with food to enhance absorption
B. Monitor the client closely for therapeutic and toxic effects and check serum drug levels
C. Encourage the client to increase fluid intake to promote renal excretion
D. Teach the client to take the medication at the same time each day for consistency
Correct Answer: B
Rationale: A narrow therapeutic index means the difference between a therapeutic dose and a toxic dose is
very small, as seen with medications such as warfarin, digoxin, lithium, and aminoglycosides. The most
critical nursing intervention is close monitoring of serum drug levels and assessing for signs of both
therapeutic response and toxicity. Administering with food (A) may affect absorption but is not the priority
for narrow therapeutic index drugs. Increasing fluid intake (C) is a general measure that does not address the
primary safety concern. While timing consistency (D) is good practice, it does not replace the need for serum
level monitoring for narrow therapeutic index medications.
Q4: Which of the following factors most significantly affects drug absorption when a medication is
administered orally?
A. The client's body mass index
B. Gastrointestinal pH and blood flow to the absorption site
C. The client's resting heart rate
D. The amount of subcutaneous fat at the injection site
Correct Answer: B
Rationale: Drug absorption from the gastrointestinal tract is influenced by several factors, with pH and blood
flow being among the most significant. The pH of the GI tract affects the ionization state of a drug, and only
non-ionized (lipophilic) forms of drugs are readily absorbed across lipid membranes. Blood flow to the
absorption site also determines how quickly the absorbed drug is carried away into systemic circulation.
Body mass index (A) is more relevant to drug distribution volume. Heart rate (C) and subcutaneous fat (D)
do not directly impact oral drug absorption, though they may affect distribution or parenteral drug absorption
respectively.
Q5: A nurse is explaining bioavailability to a nursing student. Which statement by the student indicates
a correct understanding?
A. Bioavailability is the total amount of drug administered to the client
B. Bioavailability refers to the fraction of the administered drug that reaches systemic circulation in an
active form
C. Bioavailability is the rate at which a drug is metabolized by the liver
D. Bioavailability describes the protein-binding capacity of a drug in the bloodstream
Correct Answer: B
Rationale: Bioavailability is defined as the fraction or percentage of an administered drug that reaches the
systemic circulation in an active, unchanged form. Drugs administered intravenously have 100%
bioavailability since they are placed directly into the bloodstream. Oral drugs typically have lower
bioavailability due to incomplete absorption and the first-pass effect. It is not the total dose administered (A),
the rate of hepatic metabolism (C), or the protein-binding capacity (D). Understanding bioavailability is
essential when switching a patient between routes of administration to ensure equivalent therapeutic effects.
Q6: A client with liver cirrhosis is prescribed a medication that is extensively metabolized by the
cytochrome P450 enzyme system. What should the nurse anticipate?
2
, NUR210 Exam 3: Principles of Pharmacology Galen College of Nursing | 2025-2026
A. The drug will be eliminated more rapidly, requiring a higher dose
B. The drug may accumulate to toxic levels due to impaired hepatic metabolism, requiring a lower dose
C. The drug's absorption will be enhanced, leading to a faster onset of action
D. The drug's protein binding will increase, reducing its free (active) concentration
Correct Answer: B
Rationale: The liver is the primary site of drug metabolism, and the cytochrome P450 (CYP450) enzyme
system is responsible for the biotransformation of many drugs. In clients with liver cirrhosis, hepatic function
is significantly impaired, leading to reduced metabolic capacity. This means drugs that undergo extensive
hepatic metabolism will be metabolized more slowly, potentially accumulating to toxic levels. The nurse
should anticipate the need for a lower dose or longer dosing intervals. Rapid elimination (A) would not occur
with impaired liver function. Absorption (C) primarily occurs in the GI tract, not the liver. Protein binding
(D) may actually decrease in liver disease due to reduced albumin production, which would increase free
drug concentration.
Q7: The healthcare provider orders a loading dose of a medication for a client in an acute condition.
What is the purpose of a loading dose?
A. To maintain a steady therapeutic level over a prolonged period
B. To rapidly achieve a therapeutic drug concentration to produce an immediate effect
C. To compensate for increased renal excretion of the drug
D. To minimize the risk of drug toxicity by starting at a low dose
Correct Answer: B
Rationale: A loading dose is a higher-than-usual initial dose of a medication given to rapidly achieve
therapeutic drug concentrations. Without a loading dose, it would take four to five half-lives to reach steady
state, which may be unacceptable in acute situations. After the loading dose, a lower maintenance dose is
given to sustain therapeutic levels. Maintaining steady levels (A) is the purpose of the maintenance dose, not
the loading dose. Compensating for increased excretion (C) and minimizing toxicity (D) are not the purposes
of a loading dose; in fact, loading doses require careful calculation to avoid toxicity.
Q8: A nurse understands that highly protein-bound drugs have which characteristic?
A. They are rapidly excreted by the kidneys in their free form
B. Only the unbound (free) fraction of the drug is pharmacologically active and available for
metabolism
C. They have a large volume of distribution and are stored primarily in adipose tissue
D. They are not affected by drug-drug interactions involving protein binding
Correct Answer: B
Rationale: Drugs bind to plasma proteins (primarily albumin) to varying degrees. Only the unbound or free
fraction of a drug is pharmacologically active, able to cross cell membranes, and available for metabolism
and excretion. When two highly protein-bound drugs are administered together, they may compete for
binding sites, displacing each other and increasing the free fraction of one or both drugs, potentially leading
to toxicity. Protein-bound drugs are NOT rapidly excreted (A); binding actually slows elimination. Volume
of distribution (C) is a separate concept. Protein-binding drug interactions (D) are a significant clinical
concern and must be closely monitored.
Q9: A client is receiving a medication that is primarily excreted through the kidneys. The nurse notes the
client has a creatinine clearance of 25 mL/min. What nursing action is most appropriate?
A. Administer the medication as prescribed because the dose does not need adjustment
3
NUR210 / NUR 210 Exam 3 (Latest )
Principles of Pharmacology Tested Questions
with Revised Correct Answers
Institution: Galen College of Nursing
Course: NUR210 - Principles of Pharmacology
Total Questions: 50 Multiple Choice (A-D)
Content Coverage: Pharmacokinetics, Pharmacodynamics, Medication Administration, Drug Classifications, ADR and
Drug Interactions, Nursing Interventions
Cognitive Levels: 30% Recall, 50% Application, 20% Analysis
Section 1: Principles of Pharmacology and Pharmacokinetics (Q1 - Q10)
Topics: Absorption, Distribution, Metabolism, Excretion, Half-Life, Steady State, Bioavailability, Loading Dose,
Maintenance Dose, Therapeutic Index
Q1: A nurse is administering an oral medication to a client. The nurse understands that the first-pass
effect refers to which process?
A. The drug is metabolized in the liver before reaching systemic circulation, reducing bioavailability
B. The drug is distributed rapidly to highly perfused organs such as the brain and heart
C. The drug is excreted primarily by the kidneys through glomerular filtration
D. The drug is absorbed through the gastric mucosa directly into the portal vein
Correct Answer: A
Rationale: The first-pass effect occurs when orally administered drugs are absorbed through the
gastrointestinal tract and transported via the portal vein to the liver, where they undergo significant
metabolism before entering systemic circulation. This process substantially reduces the bioavailability of
many drugs, which is why some medications (e.g., nitroglycerin) must be given via sublingual or transdermal
routes to bypass hepatic first-pass metabolism. Distribution to organs (B) is a separate pharmacokinetic
phase. Renal excretion (C) is the primary elimination route, not first-pass metabolism. While gastric
absorption (D) does occur, it is the subsequent hepatic metabolism that defines the first-pass effect.
Q2: A client is prescribed a drug with a half-life of 12 hours. Approximately how long will it take for the
drug to reach steady-state concentration?
A. 12 hours
B. 24 hours
C. 48 to 60 hours
D. 120 hours
Correct Answer: C
Rationale: Steady state is achieved when the rate of drug administration equals the rate of elimination,
typically requiring four to five half-lives. With a half-life of 12 hours, four half-lives equals 48 hours and five
half-lives equals 60 hours, so steady state is reached in approximately 48 to 60 hours. One half-life (A) only
reduces the concentration by 50%. Two half-lives or 24 hours (B) reaches only 75% of steady state. Five full
days (D) would be 10 half-lives, which far exceeds the requirement and is not clinically necessary to achieve
steady-state concentration.
1
,NUR210 Exam 3: Principles of Pharmacology Galen College of Nursing | 2025-2026
Q3: A nurse is reviewing a medication that has a narrow therapeutic index. Which of the following is the
most important nursing intervention?
A. Administer the medication with food to enhance absorption
B. Monitor the client closely for therapeutic and toxic effects and check serum drug levels
C. Encourage the client to increase fluid intake to promote renal excretion
D. Teach the client to take the medication at the same time each day for consistency
Correct Answer: B
Rationale: A narrow therapeutic index means the difference between a therapeutic dose and a toxic dose is
very small, as seen with medications such as warfarin, digoxin, lithium, and aminoglycosides. The most
critical nursing intervention is close monitoring of serum drug levels and assessing for signs of both
therapeutic response and toxicity. Administering with food (A) may affect absorption but is not the priority
for narrow therapeutic index drugs. Increasing fluid intake (C) is a general measure that does not address the
primary safety concern. While timing consistency (D) is good practice, it does not replace the need for serum
level monitoring for narrow therapeutic index medications.
Q4: Which of the following factors most significantly affects drug absorption when a medication is
administered orally?
A. The client's body mass index
B. Gastrointestinal pH and blood flow to the absorption site
C. The client's resting heart rate
D. The amount of subcutaneous fat at the injection site
Correct Answer: B
Rationale: Drug absorption from the gastrointestinal tract is influenced by several factors, with pH and blood
flow being among the most significant. The pH of the GI tract affects the ionization state of a drug, and only
non-ionized (lipophilic) forms of drugs are readily absorbed across lipid membranes. Blood flow to the
absorption site also determines how quickly the absorbed drug is carried away into systemic circulation.
Body mass index (A) is more relevant to drug distribution volume. Heart rate (C) and subcutaneous fat (D)
do not directly impact oral drug absorption, though they may affect distribution or parenteral drug absorption
respectively.
Q5: A nurse is explaining bioavailability to a nursing student. Which statement by the student indicates
a correct understanding?
A. Bioavailability is the total amount of drug administered to the client
B. Bioavailability refers to the fraction of the administered drug that reaches systemic circulation in an
active form
C. Bioavailability is the rate at which a drug is metabolized by the liver
D. Bioavailability describes the protein-binding capacity of a drug in the bloodstream
Correct Answer: B
Rationale: Bioavailability is defined as the fraction or percentage of an administered drug that reaches the
systemic circulation in an active, unchanged form. Drugs administered intravenously have 100%
bioavailability since they are placed directly into the bloodstream. Oral drugs typically have lower
bioavailability due to incomplete absorption and the first-pass effect. It is not the total dose administered (A),
the rate of hepatic metabolism (C), or the protein-binding capacity (D). Understanding bioavailability is
essential when switching a patient between routes of administration to ensure equivalent therapeutic effects.
Q6: A client with liver cirrhosis is prescribed a medication that is extensively metabolized by the
cytochrome P450 enzyme system. What should the nurse anticipate?
2
, NUR210 Exam 3: Principles of Pharmacology Galen College of Nursing | 2025-2026
A. The drug will be eliminated more rapidly, requiring a higher dose
B. The drug may accumulate to toxic levels due to impaired hepatic metabolism, requiring a lower dose
C. The drug's absorption will be enhanced, leading to a faster onset of action
D. The drug's protein binding will increase, reducing its free (active) concentration
Correct Answer: B
Rationale: The liver is the primary site of drug metabolism, and the cytochrome P450 (CYP450) enzyme
system is responsible for the biotransformation of many drugs. In clients with liver cirrhosis, hepatic function
is significantly impaired, leading to reduced metabolic capacity. This means drugs that undergo extensive
hepatic metabolism will be metabolized more slowly, potentially accumulating to toxic levels. The nurse
should anticipate the need for a lower dose or longer dosing intervals. Rapid elimination (A) would not occur
with impaired liver function. Absorption (C) primarily occurs in the GI tract, not the liver. Protein binding
(D) may actually decrease in liver disease due to reduced albumin production, which would increase free
drug concentration.
Q7: The healthcare provider orders a loading dose of a medication for a client in an acute condition.
What is the purpose of a loading dose?
A. To maintain a steady therapeutic level over a prolonged period
B. To rapidly achieve a therapeutic drug concentration to produce an immediate effect
C. To compensate for increased renal excretion of the drug
D. To minimize the risk of drug toxicity by starting at a low dose
Correct Answer: B
Rationale: A loading dose is a higher-than-usual initial dose of a medication given to rapidly achieve
therapeutic drug concentrations. Without a loading dose, it would take four to five half-lives to reach steady
state, which may be unacceptable in acute situations. After the loading dose, a lower maintenance dose is
given to sustain therapeutic levels. Maintaining steady levels (A) is the purpose of the maintenance dose, not
the loading dose. Compensating for increased excretion (C) and minimizing toxicity (D) are not the purposes
of a loading dose; in fact, loading doses require careful calculation to avoid toxicity.
Q8: A nurse understands that highly protein-bound drugs have which characteristic?
A. They are rapidly excreted by the kidneys in their free form
B. Only the unbound (free) fraction of the drug is pharmacologically active and available for
metabolism
C. They have a large volume of distribution and are stored primarily in adipose tissue
D. They are not affected by drug-drug interactions involving protein binding
Correct Answer: B
Rationale: Drugs bind to plasma proteins (primarily albumin) to varying degrees. Only the unbound or free
fraction of a drug is pharmacologically active, able to cross cell membranes, and available for metabolism
and excretion. When two highly protein-bound drugs are administered together, they may compete for
binding sites, displacing each other and increasing the free fraction of one or both drugs, potentially leading
to toxicity. Protein-bound drugs are NOT rapidly excreted (A); binding actually slows elimination. Volume
of distribution (C) is a separate concept. Protein-binding drug interactions (D) are a significant clinical
concern and must be closely monitored.
Q9: A client is receiving a medication that is primarily excreted through the kidneys. The nurse notes the
client has a creatinine clearance of 25 mL/min. What nursing action is most appropriate?
A. Administer the medication as prescribed because the dose does not need adjustment
3
