WGU D116 Advanced Pharmacology OA &
ACTUAL EXAM 2026/2027 | Verified
Questions and Correct Detailed Answers
Pass Guaranteed - A+ Graded
Pharmacokinetics, Pharmacodynamics & Medication Safety (Questions 1–17)
Q1: A 72-year-old patient with mild renal impairment is prescribed a medication with a therapeutic
index of 2. The nurse practitioner recognizes this means which of the following?
A. The drug is safe to use in renal impairment without dose adjustment.
B. The drug requires close monitoring because the toxic dose is only twice the effective dose. [CORRECT]
C. The drug has a wide safety margin and rarely causes toxicity.
D. The therapeutic index refers only to the drug's half-life duration.
Correct Answer: B
Rationale: A narrow therapeutic index of 2 means the toxic concentration is dangerously close to the
effective concentration, so you need tight monitoring—think digoxin or lithium levels.
Q2: A patient on warfarin starts taking ciprofloxacin for a UTI. The nurse practitioner anticipates which
effect on warfarin metabolism?
A. Ciprofloxacin induces CYP2C9, decreasing warfarin's effect.
B. Ciprofloxacin inhibits CYP1A2, increasing warfarin levels and bleeding risk. [CORRECT]
C. Ciprofloxacin has no effect on warfarin metabolism.
D. Ciprofloxacin increases warfarin protein binding, reducing its free fraction.
Correct Answer: B
Rationale: Ciprofloxacin is a known CYP1A2 inhibitor that can bump up warfarin levels and increase
bleeding risk—check that INR closely.
,Q3: A patient asks why their extended-release metformin can be taken once daily while their regular
metformin was twice daily. The best explanation involves which pharmacokinetic concept?
A. The extended-release formulation alters the drug's chemical structure.
B. The extended-release formulation modifies absorption rate, maintaining therapeutic levels longer.
[CORRECT]
C. The extended-release formulation increases the drug's elimination half-life.
D. The extended-release formulation changes the drug's receptor binding affinity.
Correct Answer: B
Rationale: Extended-release formulations slow absorption through specialized coatings or matrices,
giving you steadier levels and less frequent dosing without changing the drug's half-life.
Q4: A nurse is reviewing a medication reconciliation for a patient transferred from another facility.
Which finding requires the most urgent intervention?
A. A patient on amlodipine also takes grapefruit juice daily.
B. A patient on warfarin is prescribed a new NSAID for arthritis pain. [CORRECT]
C. A patient on metformin is also taking a multivitamin with iron.
D. A patient on lisinopril is prescribed a thiazide diuretic.
Correct Answer: B
Rationale: Adding an NSAID to warfarin is a major bleeding risk—both affect clotting pathways and can
cause GI hemorrhage, so this needs immediate attention and an alternative plan.
Q5: A patient with hepatic cirrhosis is prescribed a drug that is 90% metabolized by the liver. What is the
most appropriate nursing action?
A. Administer the standard dose and monitor for therapeutic effect.
B. Reduce the dose and extend the dosing interval to prevent accumulation and toxicity. [CORRECT]
C. Increase the dose because liver disease increases drug metabolism.
D. Switch to the intravenous route to bypass hepatic first-pass metabolism.
, Correct Answer: B
Rationale: With 90% hepatic metabolism and cirrhosis, that drug is going to hang around way longer—
cut the dose and space it out to avoid toxicity.
Q6: A patient receiving digoxin has a serum level of 2.8 ng/mL. The therapeutic range is 0.5–2.0 ng/mL.
The patient reports nausea and visual disturbances. What is the nurse practitioner's priority action?
A. Continue the current dose and recheck the level in one week.
B. Hold the next dose, notify the provider, and assess for toxicity. [CORRECT]
C. Administer the next dose with food to reduce nausea.
D. Increase the dose to achieve a level closer to 2.0 ng/mL.
Correct Answer: B
Rationale: A level of 2.8 with nausea and visual changes screams digoxin toxicity—hold the dose, call the
provider, and get ready to manage this.
Q7: A 78-year-old patient is on 12 medications including a benzodiazepine, an anticholinergic, and an
opioid. The nurse practitioner recognizes this patient is at highest risk for which outcome?
A. Hyperglycemia
B. Falls, confusion, and adverse drug reactions [CORRECT]
C. Hypertension
D. Hypothyroidism
Correct Answer: B
Rationale: Polypharmacy with anticholinergics, benzodiazepines, and opioids in an older adult is a
perfect storm for falls, delirium, and ADRs—time for a thorough medication review.
Q8: A patient with a history of anaphylaxis to penicillin is prescribed a cephalosporin. The nurse
practitioner knows that cross-reactivity is most likely with which generation?
A. Third-generation cephalosporins like ceftriaxone
B. First-generation cephalosporins like cefazolin [CORRECT]
ACTUAL EXAM 2026/2027 | Verified
Questions and Correct Detailed Answers
Pass Guaranteed - A+ Graded
Pharmacokinetics, Pharmacodynamics & Medication Safety (Questions 1–17)
Q1: A 72-year-old patient with mild renal impairment is prescribed a medication with a therapeutic
index of 2. The nurse practitioner recognizes this means which of the following?
A. The drug is safe to use in renal impairment without dose adjustment.
B. The drug requires close monitoring because the toxic dose is only twice the effective dose. [CORRECT]
C. The drug has a wide safety margin and rarely causes toxicity.
D. The therapeutic index refers only to the drug's half-life duration.
Correct Answer: B
Rationale: A narrow therapeutic index of 2 means the toxic concentration is dangerously close to the
effective concentration, so you need tight monitoring—think digoxin or lithium levels.
Q2: A patient on warfarin starts taking ciprofloxacin for a UTI. The nurse practitioner anticipates which
effect on warfarin metabolism?
A. Ciprofloxacin induces CYP2C9, decreasing warfarin's effect.
B. Ciprofloxacin inhibits CYP1A2, increasing warfarin levels and bleeding risk. [CORRECT]
C. Ciprofloxacin has no effect on warfarin metabolism.
D. Ciprofloxacin increases warfarin protein binding, reducing its free fraction.
Correct Answer: B
Rationale: Ciprofloxacin is a known CYP1A2 inhibitor that can bump up warfarin levels and increase
bleeding risk—check that INR closely.
,Q3: A patient asks why their extended-release metformin can be taken once daily while their regular
metformin was twice daily. The best explanation involves which pharmacokinetic concept?
A. The extended-release formulation alters the drug's chemical structure.
B. The extended-release formulation modifies absorption rate, maintaining therapeutic levels longer.
[CORRECT]
C. The extended-release formulation increases the drug's elimination half-life.
D. The extended-release formulation changes the drug's receptor binding affinity.
Correct Answer: B
Rationale: Extended-release formulations slow absorption through specialized coatings or matrices,
giving you steadier levels and less frequent dosing without changing the drug's half-life.
Q4: A nurse is reviewing a medication reconciliation for a patient transferred from another facility.
Which finding requires the most urgent intervention?
A. A patient on amlodipine also takes grapefruit juice daily.
B. A patient on warfarin is prescribed a new NSAID for arthritis pain. [CORRECT]
C. A patient on metformin is also taking a multivitamin with iron.
D. A patient on lisinopril is prescribed a thiazide diuretic.
Correct Answer: B
Rationale: Adding an NSAID to warfarin is a major bleeding risk—both affect clotting pathways and can
cause GI hemorrhage, so this needs immediate attention and an alternative plan.
Q5: A patient with hepatic cirrhosis is prescribed a drug that is 90% metabolized by the liver. What is the
most appropriate nursing action?
A. Administer the standard dose and monitor for therapeutic effect.
B. Reduce the dose and extend the dosing interval to prevent accumulation and toxicity. [CORRECT]
C. Increase the dose because liver disease increases drug metabolism.
D. Switch to the intravenous route to bypass hepatic first-pass metabolism.
, Correct Answer: B
Rationale: With 90% hepatic metabolism and cirrhosis, that drug is going to hang around way longer—
cut the dose and space it out to avoid toxicity.
Q6: A patient receiving digoxin has a serum level of 2.8 ng/mL. The therapeutic range is 0.5–2.0 ng/mL.
The patient reports nausea and visual disturbances. What is the nurse practitioner's priority action?
A. Continue the current dose and recheck the level in one week.
B. Hold the next dose, notify the provider, and assess for toxicity. [CORRECT]
C. Administer the next dose with food to reduce nausea.
D. Increase the dose to achieve a level closer to 2.0 ng/mL.
Correct Answer: B
Rationale: A level of 2.8 with nausea and visual changes screams digoxin toxicity—hold the dose, call the
provider, and get ready to manage this.
Q7: A 78-year-old patient is on 12 medications including a benzodiazepine, an anticholinergic, and an
opioid. The nurse practitioner recognizes this patient is at highest risk for which outcome?
A. Hyperglycemia
B. Falls, confusion, and adverse drug reactions [CORRECT]
C. Hypertension
D. Hypothyroidism
Correct Answer: B
Rationale: Polypharmacy with anticholinergics, benzodiazepines, and opioids in an older adult is a
perfect storm for falls, delirium, and ADRs—time for a thorough medication review.
Q8: A patient with a history of anaphylaxis to penicillin is prescribed a cephalosporin. The nurse
practitioner knows that cross-reactivity is most likely with which generation?
A. Third-generation cephalosporins like ceftriaxone
B. First-generation cephalosporins like cefazolin [CORRECT]
