NUR 210 Exam 1 V1 | NUR 210 Pharmacology | Actual Q&A with
Rationale (NUR 210 Exam 1) | Galen
1. When an oral medication is largely inactivated in the liver before reaching the systemic
circulation, what is this process called?
A. First-pass effect
B. Bioavailability
C. Half-life
D. Enzymatic induction
Answer: A
Rationale: The first-pass effect describes the metabolism of a drug by the liver
immediately after absorption from the gastrointestinal tract. This process significantly
reduces the amount of active drug that enters the bloodstream for systemic distribution.
Medications with a high first-pass effect often require higher oral doses or alternative
routes of administration like intravenous injection.
2. A nurse is administering a medication that has a high affinity for albumin. If the patient has
low albumin levels, what is the expected clinical result?
A. Decreased risk of toxicity
B. Decreased drug distribution
C. Increased levels of free drug in the blood
D. Faster excretion of the drug
Answer: C
Rationale: Albumin is the most common blood protein that binds to drug molecules, and
only unbound ‘free’ drug is pharmacologically active. When albumin levels are low, such as
in malnutrition or liver disease, there are fewer binding sites available. This results in an
increased concentration of free drug, which can lead to therapeutic or toxic effects
depending on the drug’s index.
3. Which pharmacokinetic process is most likely to be impaired in a patient with chronic renal
failure?
A. Excretion
B. Distribution
C. Metabolism
D. Absorption
,Answer: A
Rationale: The kidneys are the primary organs responsible for the excretion of drugs and
their metabolites. In patients with renal failure, the glomerular filtration rate is decreased,
causing drugs to remain in the body longer. This increases the risk of toxicity and
necessitates dosage adjustments to maintain safe serum levels.
4. The nurse is preparing to administer an enteric-coated tablet. Which action by the nurse is
correct?
A. Instructing the patient to swallow the tablet whole
B. Dissolving the tablet in water prior to administration
C. Crushing the tablet to facilitate swallowing
D. Cutting the tablet in half for a smaller dose
Answer: A
Rationale: Enteric-coated tablets are designed to bypass the stomach and dissolve in the
more alkaline environment of the small intestine to protect the stomach lining or the drug
itself. Crushing or cutting these tablets destroys the protective coating, which can lead to
gastric irritation or premature drug degradation. Nurses must ensure these medications
are swallowed whole to maintain their intended pharmacokinetic properties.
5. A drug has a half-life of 4 hours. If 100 mg of the drug is administered, how much remains
in the body after 12 hours?
A. 50 mg
B. 12.5 mg
C. 25 mg
D. 6.25 mg
Answer: B
Rationale: Half-life is the time required for the concentration of a drug to decrease by half.
After 4 hours, 50 mg remains; after 8 hours (two half-lives), 25 mg remains; and after 12
hours (three half-lives), 12.5 mg remains. Understanding half-life is crucial for determining
dosing intervals and the time required to reach steady state.
6. Which term describes a drug that binds to a receptor and produces a maximal biological
response?
A. Antagonist
B. Partial agonist
C. Agonist
, D. Inhibitor
Answer: C
Rationale: An agonist is a medication that mimics the action of endogenous substances by
binding to a receptor and triggering a physiological response. In contrast, an antagonist
binds to the receptor but blocks the response. Nurses must understand these mechanisms
to predict how a drug will affect a patient’s body systems.
7. The nurse is reviewing a drug with a narrow therapeutic index. What does this indicate
about the drug’s safety?
A. The difference between the effective dose and the toxic dose is small.
B. The drug is very safe and requires no monitoring.
C. The drug has a long half-life and is excreted slowly.
D. The drug is easily metabolized by the liver.
Answer: A
Rationale: A narrow therapeutic index means that the margin between a dose that is
beneficial and a dose that is harmful is very thin. Patients taking these drugs require close
monitoring of serum drug levels to prevent toxicity. Examples include lithium, digoxin, and
warfarin, which all necessitate frequent laboratory follow-ups.
8. A patient experiences an unexpected and unique response to a drug that is not an allergy.
How is this documented?
A. Side effect
B. Adverse drug reaction
C. Idiosyncratic reaction
D. Teratogenic effect
Answer: C
Rationale: An idiosyncratic reaction is an unpredictable and individual-specific response
to a medication, often linked to genetic differences. It is distinct from an allergic reaction
because it is not mediated by the immune system. Accurate documentation of such
reactions is vital for future medication safety for that specific patient.
9. Which of the following is the most accurate definition of pharmacokinetics?
A. The study of what the body does to the drug
B. The study of what the drug does to the body
C. The study of drug interactions
D. The study of the side effects of medications
Rationale (NUR 210 Exam 1) | Galen
1. When an oral medication is largely inactivated in the liver before reaching the systemic
circulation, what is this process called?
A. First-pass effect
B. Bioavailability
C. Half-life
D. Enzymatic induction
Answer: A
Rationale: The first-pass effect describes the metabolism of a drug by the liver
immediately after absorption from the gastrointestinal tract. This process significantly
reduces the amount of active drug that enters the bloodstream for systemic distribution.
Medications with a high first-pass effect often require higher oral doses or alternative
routes of administration like intravenous injection.
2. A nurse is administering a medication that has a high affinity for albumin. If the patient has
low albumin levels, what is the expected clinical result?
A. Decreased risk of toxicity
B. Decreased drug distribution
C. Increased levels of free drug in the blood
D. Faster excretion of the drug
Answer: C
Rationale: Albumin is the most common blood protein that binds to drug molecules, and
only unbound ‘free’ drug is pharmacologically active. When albumin levels are low, such as
in malnutrition or liver disease, there are fewer binding sites available. This results in an
increased concentration of free drug, which can lead to therapeutic or toxic effects
depending on the drug’s index.
3. Which pharmacokinetic process is most likely to be impaired in a patient with chronic renal
failure?
A. Excretion
B. Distribution
C. Metabolism
D. Absorption
,Answer: A
Rationale: The kidneys are the primary organs responsible for the excretion of drugs and
their metabolites. In patients with renal failure, the glomerular filtration rate is decreased,
causing drugs to remain in the body longer. This increases the risk of toxicity and
necessitates dosage adjustments to maintain safe serum levels.
4. The nurse is preparing to administer an enteric-coated tablet. Which action by the nurse is
correct?
A. Instructing the patient to swallow the tablet whole
B. Dissolving the tablet in water prior to administration
C. Crushing the tablet to facilitate swallowing
D. Cutting the tablet in half for a smaller dose
Answer: A
Rationale: Enteric-coated tablets are designed to bypass the stomach and dissolve in the
more alkaline environment of the small intestine to protect the stomach lining or the drug
itself. Crushing or cutting these tablets destroys the protective coating, which can lead to
gastric irritation or premature drug degradation. Nurses must ensure these medications
are swallowed whole to maintain their intended pharmacokinetic properties.
5. A drug has a half-life of 4 hours. If 100 mg of the drug is administered, how much remains
in the body after 12 hours?
A. 50 mg
B. 12.5 mg
C. 25 mg
D. 6.25 mg
Answer: B
Rationale: Half-life is the time required for the concentration of a drug to decrease by half.
After 4 hours, 50 mg remains; after 8 hours (two half-lives), 25 mg remains; and after 12
hours (three half-lives), 12.5 mg remains. Understanding half-life is crucial for determining
dosing intervals and the time required to reach steady state.
6. Which term describes a drug that binds to a receptor and produces a maximal biological
response?
A. Antagonist
B. Partial agonist
C. Agonist
, D. Inhibitor
Answer: C
Rationale: An agonist is a medication that mimics the action of endogenous substances by
binding to a receptor and triggering a physiological response. In contrast, an antagonist
binds to the receptor but blocks the response. Nurses must understand these mechanisms
to predict how a drug will affect a patient’s body systems.
7. The nurse is reviewing a drug with a narrow therapeutic index. What does this indicate
about the drug’s safety?
A. The difference between the effective dose and the toxic dose is small.
B. The drug is very safe and requires no monitoring.
C. The drug has a long half-life and is excreted slowly.
D. The drug is easily metabolized by the liver.
Answer: A
Rationale: A narrow therapeutic index means that the margin between a dose that is
beneficial and a dose that is harmful is very thin. Patients taking these drugs require close
monitoring of serum drug levels to prevent toxicity. Examples include lithium, digoxin, and
warfarin, which all necessitate frequent laboratory follow-ups.
8. A patient experiences an unexpected and unique response to a drug that is not an allergy.
How is this documented?
A. Side effect
B. Adverse drug reaction
C. Idiosyncratic reaction
D. Teratogenic effect
Answer: C
Rationale: An idiosyncratic reaction is an unpredictable and individual-specific response
to a medication, often linked to genetic differences. It is distinct from an allergic reaction
because it is not mediated by the immune system. Accurate documentation of such
reactions is vital for future medication safety for that specific patient.
9. Which of the following is the most accurate definition of pharmacokinetics?
A. The study of what the body does to the drug
B. The study of what the drug does to the body
C. The study of drug interactions
D. The study of the side effects of medications
