ATI RN Capstone Pharmacology Practice 2026/2027 |
Pharmacology 1 & 2 Nursing Study Guide, Practice
Questions & Answers, ATI Capstone Exam Prep,
Comprehensive Medication Review
Question 1: A nurse is reviewing a client's laboratory results before
administering a medication that is highly protein-bound. The
client's serum albumin level is 2.1 g/dL. The nurse should identify
that which of the following effects is most likely to occur?
A. Decreased therapeutic effect due to reduced free drug availability
B. Increased risk of toxicity due to elevated free drug levels
C. Prolonged elimination half-life due to enhanced hepatic metabolism
D. Reduced absorption due to decreased gastric pH
CORRECT ANSWER: B. Increased risk of toxicity due to elevated
free drug levels
Rationale: Albumin is the primary binding protein for many drugs,
particularly acidic drugs. When serum albumin is low (hypoalbuminemia, as
in malnutrition, liver disease, or nephrotic syndrome), fewer protein-binding
sites are available, resulting in an increased fraction of unbound (free) drug.
Only free drug is pharmacologically active, so low albumin leads to
exaggerated drug effects and potential toxicity even at standard doses.
Question 2: A nurse is teaching a client about the difference
between pharmacokinetics and pharmacodynamics. Which of the
following statements by the client indicates correct understanding?
A. "Pharmacodynamics is what my body does to the drug, and
pharmacokinetics is what the drug does to my body."
B. "Pharmacokinetics is what my body does to the drug, and
pharmacodynamics is what the drug does to my body."
C. "Both terms describe the same process of drug movement through the
body."
D. "Pharmacokinetics refers to drug toxicity, while pharmacodynamics
refers to drug effectiveness."
CORRECT ANSWER: B. "Pharmacokinetics is what my body does to
the drug, and pharmacodynamics is what the drug does to my
body."
Rationale: Pharmacokinetics encompasses absorption, distribution,
metabolism, and excretion (ADME) — the body's handling of the drug.
,Pharmacodynamics describes the drug's mechanism of action, therapeutic
effects, and adverse effects at target sites. This distinction is foundational
for predicting drug onset, duration, and individual response variability.
Question 3: A nurse is preparing to administer a medication with a
narrow therapeutic index. Which of the following actions should
the nurse prioritize?
A. Administer the medication with food to enhance absorption
B. Monitor serum drug levels closely and assess for signs of toxicity
C. Encourage the client to double the dose if a dose is missed
D. Administer the medication intramuscularly instead of orally
CORRECT ANSWER: B. Monitor serum drug levels closely and
assess for signs of toxicity
Rationale: A narrow therapeutic index means the toxic dose is close to the
therapeutic dose (e.g., digoxin, lithium, warfarin, phenytoin). Even small
fluctuations in serum concentration can cause toxicity or therapeutic
failure. Close monitoring of drug levels, along with vigilant assessment for
adverse effects, is essential to maintain safe and effective therapy.
Question 4: A nurse is administering a drug that undergoes
extensive first-pass metabolism. Which of the following routes of
administration would bypass this effect?
A. Oral tablet
B. Oral capsule
C. Intravenous injection
D. Sublingual tablet
CORRECT ANSWER: C. Intravenous injection
Rationale: First-pass metabolism occurs when orally administered drugs
are absorbed from the gastrointestinal tract and transported via the portal
vein to the liver, where they are metabolized before reaching systemic
circulation. IV administration delivers the drug directly into the
bloodstream, completely bypassing the liver's initial metabolic pass.
Sublingual absorption also partially bypasses first-pass but is not as
complete as IV.
Question 5: A nurse is calculating the half-life of a medication to
determine when steady-state concentration will be achieved. If the
,drug's half-life is 8 hours and no loading dose is given,
approximately how long will it take to reach steady state?
A. 8 hours
B. 16 hours
C. 40 hours
D. 80 hours
CORRECT ANSWER: C. 40 hours
Rationale: Steady-state plasma concentration is typically achieved after
approximately 4 to 5 half-lives. With a half-life of 8 hours, 5 × 8 = 40 hours.
A loading dose can achieve therapeutic levels more rapidly but does not
shorten the time to steady state; it simply raises the starting concentration.
Question 6: A nurse is reviewing the concept of bioavailability.
Which of the following formulations would be expected to have the
highest bioavailability?
A. Oral tablet
B. Oral enteric-coated tablet
C. Intravenous solution
D. Rectal suppository
CORRECT ANSWER: C. Intravenous solution
Rationale: Bioavailability is the fraction of an administered dose that
reaches systemic circulation in an active form. IV administration provides
100% bioavailability because the drug enters the bloodstream directly
without absorption barriers or first-pass metabolism. Oral formulations are
subject to variable absorption and hepatic first-pass effects, reducing
bioavailability.
Question 7: A nurse is assessing a client who takes a drug that is a
potent enzyme inducer. The nurse should anticipate that the
concurrent use of a drug metabolized by the same hepatic enzymes
will result in which of the following?
A. Increased therapeutic effect of the second drug
B. Decreased therapeutic effect of the second drug
C. No change in the second drug's metabolism
D. Immediate toxicity from the second drug
, CORRECT ANSWER: B. Decreased therapeutic effect of the second
drug
Rationale: Enzyme inducers (e.g., rifampin, carbamazepine, phenytoin)
increase the activity of hepatic cytochrome P450 enzymes, accelerating the
metabolism of drugs that use the same metabolic pathways. This reduces
the serum concentration and therapeutic effect of the second drug. The
nurse should monitor for decreased efficacy and anticipate possible dosage
adjustments.
Question 8: A nurse is caring for a client who has liver cirrhosis.
The nurse should anticipate that medications metabolized by the
liver will require which of the following adjustments?
A. Higher doses to achieve therapeutic effect
B. Lower doses to prevent toxicity
C. No change in dosing because the kidneys compensate
D. More frequent dosing to maintain levels
CORRECT ANSWER: B. Lower doses to prevent toxicity
Rationale: Liver cirrhosis impairs hepatic metabolism, reducing the
clearance of drugs metabolized by the liver. This leads to drug
accumulation and increased risk of toxicity. Dosages should typically be
reduced, and the nurse should monitor closely for adverse effects. The
kidneys do not fully compensate for impaired hepatic metabolism.
Question 9: A nurse is reviewing a medication order for a drug that
is excreted primarily by the kidneys. The client has a creatinine
clearance of 25 mL/min. The nurse should anticipate which of the
following?
A. An increased dose to overcome reduced absorption
B. A decreased dose to prevent accumulation and toxicity
C. No change in dose because renal function does not affect drug levels
D. More frequent dosing to maintain therapeutic levels
CORRECT ANSWER: B. A decreased dose to prevent accumulation
and toxicity
Rationale: When renal function is impaired (creatinine clearance of 25
mL/min indicates moderate-to-severe impairment), drugs eliminated by the
kidneys are cleared more slowly, leading to accumulation and potential
Pharmacology 1 & 2 Nursing Study Guide, Practice
Questions & Answers, ATI Capstone Exam Prep,
Comprehensive Medication Review
Question 1: A nurse is reviewing a client's laboratory results before
administering a medication that is highly protein-bound. The
client's serum albumin level is 2.1 g/dL. The nurse should identify
that which of the following effects is most likely to occur?
A. Decreased therapeutic effect due to reduced free drug availability
B. Increased risk of toxicity due to elevated free drug levels
C. Prolonged elimination half-life due to enhanced hepatic metabolism
D. Reduced absorption due to decreased gastric pH
CORRECT ANSWER: B. Increased risk of toxicity due to elevated
free drug levels
Rationale: Albumin is the primary binding protein for many drugs,
particularly acidic drugs. When serum albumin is low (hypoalbuminemia, as
in malnutrition, liver disease, or nephrotic syndrome), fewer protein-binding
sites are available, resulting in an increased fraction of unbound (free) drug.
Only free drug is pharmacologically active, so low albumin leads to
exaggerated drug effects and potential toxicity even at standard doses.
Question 2: A nurse is teaching a client about the difference
between pharmacokinetics and pharmacodynamics. Which of the
following statements by the client indicates correct understanding?
A. "Pharmacodynamics is what my body does to the drug, and
pharmacokinetics is what the drug does to my body."
B. "Pharmacokinetics is what my body does to the drug, and
pharmacodynamics is what the drug does to my body."
C. "Both terms describe the same process of drug movement through the
body."
D. "Pharmacokinetics refers to drug toxicity, while pharmacodynamics
refers to drug effectiveness."
CORRECT ANSWER: B. "Pharmacokinetics is what my body does to
the drug, and pharmacodynamics is what the drug does to my
body."
Rationale: Pharmacokinetics encompasses absorption, distribution,
metabolism, and excretion (ADME) — the body's handling of the drug.
,Pharmacodynamics describes the drug's mechanism of action, therapeutic
effects, and adverse effects at target sites. This distinction is foundational
for predicting drug onset, duration, and individual response variability.
Question 3: A nurse is preparing to administer a medication with a
narrow therapeutic index. Which of the following actions should
the nurse prioritize?
A. Administer the medication with food to enhance absorption
B. Monitor serum drug levels closely and assess for signs of toxicity
C. Encourage the client to double the dose if a dose is missed
D. Administer the medication intramuscularly instead of orally
CORRECT ANSWER: B. Monitor serum drug levels closely and
assess for signs of toxicity
Rationale: A narrow therapeutic index means the toxic dose is close to the
therapeutic dose (e.g., digoxin, lithium, warfarin, phenytoin). Even small
fluctuations in serum concentration can cause toxicity or therapeutic
failure. Close monitoring of drug levels, along with vigilant assessment for
adverse effects, is essential to maintain safe and effective therapy.
Question 4: A nurse is administering a drug that undergoes
extensive first-pass metabolism. Which of the following routes of
administration would bypass this effect?
A. Oral tablet
B. Oral capsule
C. Intravenous injection
D. Sublingual tablet
CORRECT ANSWER: C. Intravenous injection
Rationale: First-pass metabolism occurs when orally administered drugs
are absorbed from the gastrointestinal tract and transported via the portal
vein to the liver, where they are metabolized before reaching systemic
circulation. IV administration delivers the drug directly into the
bloodstream, completely bypassing the liver's initial metabolic pass.
Sublingual absorption also partially bypasses first-pass but is not as
complete as IV.
Question 5: A nurse is calculating the half-life of a medication to
determine when steady-state concentration will be achieved. If the
,drug's half-life is 8 hours and no loading dose is given,
approximately how long will it take to reach steady state?
A. 8 hours
B. 16 hours
C. 40 hours
D. 80 hours
CORRECT ANSWER: C. 40 hours
Rationale: Steady-state plasma concentration is typically achieved after
approximately 4 to 5 half-lives. With a half-life of 8 hours, 5 × 8 = 40 hours.
A loading dose can achieve therapeutic levels more rapidly but does not
shorten the time to steady state; it simply raises the starting concentration.
Question 6: A nurse is reviewing the concept of bioavailability.
Which of the following formulations would be expected to have the
highest bioavailability?
A. Oral tablet
B. Oral enteric-coated tablet
C. Intravenous solution
D. Rectal suppository
CORRECT ANSWER: C. Intravenous solution
Rationale: Bioavailability is the fraction of an administered dose that
reaches systemic circulation in an active form. IV administration provides
100% bioavailability because the drug enters the bloodstream directly
without absorption barriers or first-pass metabolism. Oral formulations are
subject to variable absorption and hepatic first-pass effects, reducing
bioavailability.
Question 7: A nurse is assessing a client who takes a drug that is a
potent enzyme inducer. The nurse should anticipate that the
concurrent use of a drug metabolized by the same hepatic enzymes
will result in which of the following?
A. Increased therapeutic effect of the second drug
B. Decreased therapeutic effect of the second drug
C. No change in the second drug's metabolism
D. Immediate toxicity from the second drug
, CORRECT ANSWER: B. Decreased therapeutic effect of the second
drug
Rationale: Enzyme inducers (e.g., rifampin, carbamazepine, phenytoin)
increase the activity of hepatic cytochrome P450 enzymes, accelerating the
metabolism of drugs that use the same metabolic pathways. This reduces
the serum concentration and therapeutic effect of the second drug. The
nurse should monitor for decreased efficacy and anticipate possible dosage
adjustments.
Question 8: A nurse is caring for a client who has liver cirrhosis.
The nurse should anticipate that medications metabolized by the
liver will require which of the following adjustments?
A. Higher doses to achieve therapeutic effect
B. Lower doses to prevent toxicity
C. No change in dosing because the kidneys compensate
D. More frequent dosing to maintain levels
CORRECT ANSWER: B. Lower doses to prevent toxicity
Rationale: Liver cirrhosis impairs hepatic metabolism, reducing the
clearance of drugs metabolized by the liver. This leads to drug
accumulation and increased risk of toxicity. Dosages should typically be
reduced, and the nurse should monitor closely for adverse effects. The
kidneys do not fully compensate for impaired hepatic metabolism.
Question 9: A nurse is reviewing a medication order for a drug that
is excreted primarily by the kidneys. The client has a creatinine
clearance of 25 mL/min. The nurse should anticipate which of the
following?
A. An increased dose to overcome reduced absorption
B. A decreased dose to prevent accumulation and toxicity
C. No change in dose because renal function does not affect drug levels
D. More frequent dosing to maintain therapeutic levels
CORRECT ANSWER: B. A decreased dose to prevent accumulation
and toxicity
Rationale: When renal function is impaired (creatinine clearance of 25
mL/min indicates moderate-to-severe impairment), drugs eliminated by the
kidneys are cleared more slowly, leading to accumulation and potential
