ATI PN Pharmacology Proctored Exam 2026 |
Level 3 Practice Questions and Answers with
Rationales | Complete Review
Section 1: Basic Pharmacology Principles (Questions 1–20)
1. A nurse is providing teaching to a client about the pharmacokinetics of a
newly prescribed medication. Which statement correctly describes the term
“absorption”?
• A. The process by which a drug is transported throughout the body
• B. The process by which a drug moves from the site of administration into
the bloodstream
• C. The process by which a drug is chemically altered by the liver
• D. The process by which a drug is eliminated from the body
o Correct Answer: B. The process by which a drug moves from the site
of administration into the bloodstream
o Rationale: Absorption is the movement of a drug from its site of
administration into the bloodstream. Distribution transports the drug
throughout the body, metabolism chemically alters it, and excretion
eliminates it.
2. A nurse is reviewing a medication order for a client who has severe liver
disease. Which pharmacokinetic process is primarily affected?
• A. Absorption
• B. Distribution
• C. Metabolism
• D. Excretion
, o Correct Answer: C. Metabolism
o Rationale: The liver is the primary site of drug metabolism. When
liver function is compromised, drugs metabolized by the liver
accumulate, potentially causing toxicity.
3. A client is prescribed a medication with a narrow therapeutic index. The nurse
understands that this means:
• A. The drug is very safe with a wide margin of safety
• B. There is a small margin between the effective dose and the toxic dose,
requiring close monitoring
• C. The drug is ineffective at low doses
• D. The drug has no adverse effects
o Correct Answer: B. There is a small margin between the effective
dose and the toxic dose, requiring close monitoring
o Rationale: Narrow therapeutic index drugs like digoxin, warfarin,
and lithium require close monitoring because small changes can push
levels into the toxic range.
4. Which organ is primarily responsible for the first-pass metabolism of many
oral medications?
• A. Stomach
• B. Liver
• C. Lung
• D. Kidney
o Correct Answer: B. Liver
o Rationale: Orally administered drugs absorbed from the GI tract
travel via the portal circulation to the liver, where a significant portion
may be metabolized before reaching systemic circulation.
,5. A client has impaired renal function. Why is this significant when
administering a medication that is primarily renally excreted?
• A. Renal function has no effect on medication dosing
• B. Reduced renal function can cause drug accumulation and toxicity
• C. The medication will be metabolized faster
• D. Renal impairment only affects topical medications
o Correct Answer: B. Reduced renal function can cause drug
accumulation and toxicity
o Rationale: When the kidneys cannot adequately clear a renally
excreted drug, blood levels rise, increasing the risk of toxicity.
6. A nurse is teaching a client about a sustained-release medication. Which
instruction is most important?
• A. “Chew the tablet for faster absorption”
• B. “Swallow the tablet whole; do not crush or chew”
• C. “Take with grapefruit juice for better absorption”
• D. “Dissolve the tablet in water before taking”
o Correct Answer: B. “Swallow the tablet whole; do not crush or chew”
o Rationale: Sustained-release medications should never be
crushed or chewed because doing so releases the entire dose at
once, risking toxicity.
7. A client who takes warfarin, a highly protein-bound anticoagulant, is newly
prescribed a second medication that is also highly protein bound. Which nursing
intervention is the priority?
• A. Monitor the client closely for bleeding such as bruising and dark tarry
stools
, • B. Teach the client that the anticoagulant effect of warfarin will be
decreased
• C. Explain that protein-bound drugs never interact with one another
• D. Encourage additional protein intake to bind both medications completely
o Correct Answer: A. Monitor the client closely for bleeding
o Rationale: Two highly protein-bound drugs compete for binding
sites, displacing warfarin and raising the level of free, active drug,
which increases the risk of bleeding.
8. A client begins an oral antibiotic that has a half-life of 8 hours and will take it
every 8 hours. The nurse should instruct the client that steady-state serum
concentration will generally be reached in approximately how long?
• A. 16 to 24 hours
• B. 32 to 40 hours
• C. 48 to 56 hours
• D. 64 to 72 hours
o Correct Answer: B. 32 to 40 hours
o Rationale: Steady state is reached after about 4 to 5 half-lives of
consistent dosing, so a drug with an 8-hour half-life reaches steady
state in roughly 32 to 40 hours.
9. A nurse is preparing to administer eye drops to a client. Which of the
following actions should the nurse take?
• A. Have the client lie on her side
• B. Ask the client to look up at the ceiling
• C. Tell the client to blink when the drops enter her eye
• D. Drop the medication into the center of the client‘s conjunctival sac
Level 3 Practice Questions and Answers with
Rationales | Complete Review
Section 1: Basic Pharmacology Principles (Questions 1–20)
1. A nurse is providing teaching to a client about the pharmacokinetics of a
newly prescribed medication. Which statement correctly describes the term
“absorption”?
• A. The process by which a drug is transported throughout the body
• B. The process by which a drug moves from the site of administration into
the bloodstream
• C. The process by which a drug is chemically altered by the liver
• D. The process by which a drug is eliminated from the body
o Correct Answer: B. The process by which a drug moves from the site
of administration into the bloodstream
o Rationale: Absorption is the movement of a drug from its site of
administration into the bloodstream. Distribution transports the drug
throughout the body, metabolism chemically alters it, and excretion
eliminates it.
2. A nurse is reviewing a medication order for a client who has severe liver
disease. Which pharmacokinetic process is primarily affected?
• A. Absorption
• B. Distribution
• C. Metabolism
• D. Excretion
, o Correct Answer: C. Metabolism
o Rationale: The liver is the primary site of drug metabolism. When
liver function is compromised, drugs metabolized by the liver
accumulate, potentially causing toxicity.
3. A client is prescribed a medication with a narrow therapeutic index. The nurse
understands that this means:
• A. The drug is very safe with a wide margin of safety
• B. There is a small margin between the effective dose and the toxic dose,
requiring close monitoring
• C. The drug is ineffective at low doses
• D. The drug has no adverse effects
o Correct Answer: B. There is a small margin between the effective
dose and the toxic dose, requiring close monitoring
o Rationale: Narrow therapeutic index drugs like digoxin, warfarin,
and lithium require close monitoring because small changes can push
levels into the toxic range.
4. Which organ is primarily responsible for the first-pass metabolism of many
oral medications?
• A. Stomach
• B. Liver
• C. Lung
• D. Kidney
o Correct Answer: B. Liver
o Rationale: Orally administered drugs absorbed from the GI tract
travel via the portal circulation to the liver, where a significant portion
may be metabolized before reaching systemic circulation.
,5. A client has impaired renal function. Why is this significant when
administering a medication that is primarily renally excreted?
• A. Renal function has no effect on medication dosing
• B. Reduced renal function can cause drug accumulation and toxicity
• C. The medication will be metabolized faster
• D. Renal impairment only affects topical medications
o Correct Answer: B. Reduced renal function can cause drug
accumulation and toxicity
o Rationale: When the kidneys cannot adequately clear a renally
excreted drug, blood levels rise, increasing the risk of toxicity.
6. A nurse is teaching a client about a sustained-release medication. Which
instruction is most important?
• A. “Chew the tablet for faster absorption”
• B. “Swallow the tablet whole; do not crush or chew”
• C. “Take with grapefruit juice for better absorption”
• D. “Dissolve the tablet in water before taking”
o Correct Answer: B. “Swallow the tablet whole; do not crush or chew”
o Rationale: Sustained-release medications should never be
crushed or chewed because doing so releases the entire dose at
once, risking toxicity.
7. A client who takes warfarin, a highly protein-bound anticoagulant, is newly
prescribed a second medication that is also highly protein bound. Which nursing
intervention is the priority?
• A. Monitor the client closely for bleeding such as bruising and dark tarry
stools
, • B. Teach the client that the anticoagulant effect of warfarin will be
decreased
• C. Explain that protein-bound drugs never interact with one another
• D. Encourage additional protein intake to bind both medications completely
o Correct Answer: A. Monitor the client closely for bleeding
o Rationale: Two highly protein-bound drugs compete for binding
sites, displacing warfarin and raising the level of free, active drug,
which increases the risk of bleeding.
8. A client begins an oral antibiotic that has a half-life of 8 hours and will take it
every 8 hours. The nurse should instruct the client that steady-state serum
concentration will generally be reached in approximately how long?
• A. 16 to 24 hours
• B. 32 to 40 hours
• C. 48 to 56 hours
• D. 64 to 72 hours
o Correct Answer: B. 32 to 40 hours
o Rationale: Steady state is reached after about 4 to 5 half-lives of
consistent dosing, so a drug with an 8-hour half-life reaches steady
state in roughly 32 to 40 hours.
9. A nurse is preparing to administer eye drops to a client. Which of the
following actions should the nurse take?
• A. Have the client lie on her side
• B. Ask the client to look up at the ceiling
• C. Tell the client to blink when the drops enter her eye
• D. Drop the medication into the center of the client‘s conjunctival sac
