NSG 252 Exam 1 Complete Study Guide
(2026/2027)
200 NCLEX-Style Pharmacology & Medical-
Surgical Practice Questions with Answers
and Detailed Rationales
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
(Questions 1-25)
1. A nurse is preparing to administer a medication but notices the dosage on
the medication label differs from the provider's order. What is the nurse's
priority action?
Answer: Do not administer the medication and verify the order with the provider.
Rationale: This scenario tests the "right dose" and safety priority. Never assume or
attempt to "fix" discrepancies independently—always clarify with the provider
before administering any medication to prevent medication errors .
2. Which phase of pharmacokinetics describes how a drug moves from the
bloodstream into body tissues?
Answer: Distribution
Rationale: Pharmacokinetics follows the ADME framework: Absorption (entry
into bloodstream), Distribution (movement to tissues), Metabolism (breakdown,
primarily in the liver), and Excretion (removal, primarily via kidneys) .
3. A patient asks why a medication must be taken at the same time each day.
What is the nurse's best response?
,Answer: To maintain a consistent therapeutic drug level in the bloodstream.
Rationale: Consistent timing prevents peaks and troughs, ensuring effectiveness
while avoiding toxicity. Fluctuating levels can lead to subtherapeutic effects or
adverse reactions .
4. Which factor most affects drug metabolism in older adults?
Answer: Decreased liver function
Rationale: Aging reduces hepatic metabolism, causing drugs to remain in the body
longer and increasing the risk of toxicity. This is a key consideration when dosing
older adult patients .
5. A nurse is administering an oral medication that should not be crushed.
What is the priority rationale?
Answer: Crushing may alter drug absorption and increase risk of toxicity.
Rationale: Extended-release or enteric-coated medications depend on intact
structure for proper release and absorption. Crushing can cause rapid release,
leading to toxicity or reduced effectiveness .
6. Which route of administration provides the fastest drug absorption?
Answer: Intravenous (IV)
Rationale: IV administration delivers medication directly into the bloodstream,
producing an immediate effect without the need for absorption through tissues .
7. A patient receiving opioids becomes difficult to arouse with slow
respirations. What is the nurse's priority action?
Answer: Hold the medication and assess respiratory status immediately.
,Rationale: This presentation indicates respiratory depression, a life-threatening
opioid side effect. Immediate assessment and intervention are critical to prevent
respiratory arrest .
8. Which term describes the maximum response a drug can produce?
Answer: Efficacy
Rationale: Efficacy refers to the maximum therapeutic effect a drug can achieve,
regardless of dose. This is distinct from potency, which refers to the dose needed to
produce an effect .
9. A patient with low albumin levels is prescribed a highly protein-bound
medication. What is the nurse's primary concern?
Answer: Increased risk of toxicity due to more free (active) drug in circulation.
Rationale: Low albumin means fewer protein-binding sites, resulting in higher
concentrations of unbound (active) drug, which increases the risk of adverse
effects .
10. A medication has a narrow therapeutic range. What does this mean for
nursing care?
Answer: There is a small difference between therapeutic and toxic doses.
Rationale: Drugs with narrow therapeutic ranges require close monitoring of drug
levels (e.g., digoxin, lithium, warfarin) to prevent toxicity while maintaining
therapeutic benefit .
11. A nurse is educating a patient about a new medication. Which statement
demonstrates understanding of the medication's purpose?
Answer: "I will take this medication to control my blood pressure and prevent
complications."
, Rationale: Patient education must include the purpose of the medication and
expected outcomes to promote adherence and understanding .
12. A patient asks what "side effects" means. What is the nurse's best
response?
Answer: Side effects are expected, predictable reactions to a medication.
Rationale: Side effects are anticipated and often mild, while adverse effects are
unintended and harmful. This distinction is important for patient education .
13. A nurse is reviewing the "five rights" of medication administration. Which
are included?
Answer: Right patient, right drug, right dose, right route, right time
Rationale: The five rights form the core safety framework for medication
administration and are highly tested on NCLEX .
14. Which patient condition would most likely require a lower medication
dose?
Answer: Renal impairment
Rationale: Reduced kidney function slows drug excretion, leading to drug
accumulation and increased risk of toxicity. Doses must often be adjusted .
15. Which factor increases risk for medication toxicity in older adults?
Answer: Decreased kidney function
Rationale: Reduced renal clearance causes drugs to accumulate in older adults,
necessitating careful dosing and monitoring .
(2026/2027)
200 NCLEX-Style Pharmacology & Medical-
Surgical Practice Questions with Answers
and Detailed Rationales
SECTION 1: PHARMACOKINETICS & PHARMACODYNAMICS
(Questions 1-25)
1. A nurse is preparing to administer a medication but notices the dosage on
the medication label differs from the provider's order. What is the nurse's
priority action?
Answer: Do not administer the medication and verify the order with the provider.
Rationale: This scenario tests the "right dose" and safety priority. Never assume or
attempt to "fix" discrepancies independently—always clarify with the provider
before administering any medication to prevent medication errors .
2. Which phase of pharmacokinetics describes how a drug moves from the
bloodstream into body tissues?
Answer: Distribution
Rationale: Pharmacokinetics follows the ADME framework: Absorption (entry
into bloodstream), Distribution (movement to tissues), Metabolism (breakdown,
primarily in the liver), and Excretion (removal, primarily via kidneys) .
3. A patient asks why a medication must be taken at the same time each day.
What is the nurse's best response?
,Answer: To maintain a consistent therapeutic drug level in the bloodstream.
Rationale: Consistent timing prevents peaks and troughs, ensuring effectiveness
while avoiding toxicity. Fluctuating levels can lead to subtherapeutic effects or
adverse reactions .
4. Which factor most affects drug metabolism in older adults?
Answer: Decreased liver function
Rationale: Aging reduces hepatic metabolism, causing drugs to remain in the body
longer and increasing the risk of toxicity. This is a key consideration when dosing
older adult patients .
5. A nurse is administering an oral medication that should not be crushed.
What is the priority rationale?
Answer: Crushing may alter drug absorption and increase risk of toxicity.
Rationale: Extended-release or enteric-coated medications depend on intact
structure for proper release and absorption. Crushing can cause rapid release,
leading to toxicity or reduced effectiveness .
6. Which route of administration provides the fastest drug absorption?
Answer: Intravenous (IV)
Rationale: IV administration delivers medication directly into the bloodstream,
producing an immediate effect without the need for absorption through tissues .
7. A patient receiving opioids becomes difficult to arouse with slow
respirations. What is the nurse's priority action?
Answer: Hold the medication and assess respiratory status immediately.
,Rationale: This presentation indicates respiratory depression, a life-threatening
opioid side effect. Immediate assessment and intervention are critical to prevent
respiratory arrest .
8. Which term describes the maximum response a drug can produce?
Answer: Efficacy
Rationale: Efficacy refers to the maximum therapeutic effect a drug can achieve,
regardless of dose. This is distinct from potency, which refers to the dose needed to
produce an effect .
9. A patient with low albumin levels is prescribed a highly protein-bound
medication. What is the nurse's primary concern?
Answer: Increased risk of toxicity due to more free (active) drug in circulation.
Rationale: Low albumin means fewer protein-binding sites, resulting in higher
concentrations of unbound (active) drug, which increases the risk of adverse
effects .
10. A medication has a narrow therapeutic range. What does this mean for
nursing care?
Answer: There is a small difference between therapeutic and toxic doses.
Rationale: Drugs with narrow therapeutic ranges require close monitoring of drug
levels (e.g., digoxin, lithium, warfarin) to prevent toxicity while maintaining
therapeutic benefit .
11. A nurse is educating a patient about a new medication. Which statement
demonstrates understanding of the medication's purpose?
Answer: "I will take this medication to control my blood pressure and prevent
complications."
, Rationale: Patient education must include the purpose of the medication and
expected outcomes to promote adherence and understanding .
12. A patient asks what "side effects" means. What is the nurse's best
response?
Answer: Side effects are expected, predictable reactions to a medication.
Rationale: Side effects are anticipated and often mild, while adverse effects are
unintended and harmful. This distinction is important for patient education .
13. A nurse is reviewing the "five rights" of medication administration. Which
are included?
Answer: Right patient, right drug, right dose, right route, right time
Rationale: The five rights form the core safety framework for medication
administration and are highly tested on NCLEX .
14. Which patient condition would most likely require a lower medication
dose?
Answer: Renal impairment
Rationale: Reduced kidney function slows drug excretion, leading to drug
accumulation and increased risk of toxicity. Doses must often be adjusted .
15. Which factor increases risk for medication toxicity in older adults?
Answer: Decreased kidney function
Rationale: Reduced renal clearance causes drugs to accumulate in older adults,
necessitating careful dosing and monitoring .
