NEWEST 2025/2026 WGU D027
OBJECTIVE ASSESSMENT EXAM
TESTBANK AND A COMPREHENSIVE
STUDY GUIDE COMPLETE ACCURATE
TEST QUESTIONS AND CORRECT
VERIFIED ANSWERS (A NEW
UPDATED VERSIONS) |GUARANTEED
PASS A+ (BRAND NEW
1. A patient with heart failure is prescribed digoxin. Which lab
value is most critical to monitor before administration?
A. Serum creatinine
B. Serum potassium
C. Hemoglobin
D. Prothrombin time
Answer: B.
Rationale: Hypokalemia increases the risk of digoxin toxicity.
Digoxin binds to the Na⁺/K⁺-ATPase pump; low potassium
enhances this binding, leading to arrhythmias.
,2. A nurse is reviewing the medication list of an 80-year-old
patient. Which age-related change most affects drug distribution?
A. Increased gastric pH
B. Decreased total body water
C. Reduced liver blood flow
D. Decreased glomerular filtration rate
Answer: B.
Rationale: Older adults have decreased total body water and
increased body fat, altering volume of distribution for water- and
fat-soluble drugs. (Reduced liver blood flow and GFR affect
metabolism/excretion, not distribution.)
3. A patient with type 2 diabetes has been prescribed metformin.
What is the primary mechanism of action?
A. Increases insulin secretion from beta cells
B. Decreases hepatic glucose production
C. Slows carbohydrate absorption in the gut
D. Increases peripheral glucose uptake directly
Answer: B.
Rationale: Metformin decreases hepatic gluconeogenesis and
improves peripheral insulin sensitivity. It does not directly increase
insulin secretion (sulfonylureas do that).
,4. Which drug interaction would most likely lead to increased risk
of bleeding when warfarin is started?
A. Amiodarone
B. Metoprolol
C. Lisinopril
D. Levothyroxine
Answer: A.
Rationale: Amiodarone inhibits CYP2C9 and CYP1A2, reducing
warfarin metabolism, thus increasing INR and bleeding risk.
5. A patient with chronic kidney disease (CKD) stage 4 is
prescribed enoxaparin for DVT prophylaxis. Which adjustment is
appropriate?
A. No dose adjustment needed
B. Dose reduction by 50%
C. Contraindicated; use unfractionated heparin
D. Increase dose due to altered protein binding
Answer: C.
Rationale: Enoxaparin is renally cleared. In severe CKD (CrCl <30
mL/min), it is generally avoided or used with extreme caution;
unfractionated heparin is preferred due to shorter half-life and
reversibility.
, 6. A patient on a monoamine oxidase inhibitor (MAOI) eats aged
cheese and develops severe hypertension. What is the
mechanism?
A. Tyramine-induced norepinephrine release
B. Direct alpha-1 agonism
C. Serotonin syndrome
D. Anticholinergic crisis
Answer: A.
Rationale: MAOIs block metabolism of tyramine, which is present
in aged cheese. Tyramine enters nerve terminals and causes
massive norepinephrine release → hypertensive crisis.
7. Which medication requires a “black box warning” for increased
risk of suicidal thoughts in young adults?
A. Fluoxetine
B. Venlafaxine
C. Bupropion
D. All of the above
Answer: D.
Rationale: All antidepressants, especially SSRIs and SNRIs, carry a
black box warning for increased suicidality in children,
adolescents, and young adults aged 18–24.
OBJECTIVE ASSESSMENT EXAM
TESTBANK AND A COMPREHENSIVE
STUDY GUIDE COMPLETE ACCURATE
TEST QUESTIONS AND CORRECT
VERIFIED ANSWERS (A NEW
UPDATED VERSIONS) |GUARANTEED
PASS A+ (BRAND NEW
1. A patient with heart failure is prescribed digoxin. Which lab
value is most critical to monitor before administration?
A. Serum creatinine
B. Serum potassium
C. Hemoglobin
D. Prothrombin time
Answer: B.
Rationale: Hypokalemia increases the risk of digoxin toxicity.
Digoxin binds to the Na⁺/K⁺-ATPase pump; low potassium
enhances this binding, leading to arrhythmias.
,2. A nurse is reviewing the medication list of an 80-year-old
patient. Which age-related change most affects drug distribution?
A. Increased gastric pH
B. Decreased total body water
C. Reduced liver blood flow
D. Decreased glomerular filtration rate
Answer: B.
Rationale: Older adults have decreased total body water and
increased body fat, altering volume of distribution for water- and
fat-soluble drugs. (Reduced liver blood flow and GFR affect
metabolism/excretion, not distribution.)
3. A patient with type 2 diabetes has been prescribed metformin.
What is the primary mechanism of action?
A. Increases insulin secretion from beta cells
B. Decreases hepatic glucose production
C. Slows carbohydrate absorption in the gut
D. Increases peripheral glucose uptake directly
Answer: B.
Rationale: Metformin decreases hepatic gluconeogenesis and
improves peripheral insulin sensitivity. It does not directly increase
insulin secretion (sulfonylureas do that).
,4. Which drug interaction would most likely lead to increased risk
of bleeding when warfarin is started?
A. Amiodarone
B. Metoprolol
C. Lisinopril
D. Levothyroxine
Answer: A.
Rationale: Amiodarone inhibits CYP2C9 and CYP1A2, reducing
warfarin metabolism, thus increasing INR and bleeding risk.
5. A patient with chronic kidney disease (CKD) stage 4 is
prescribed enoxaparin for DVT prophylaxis. Which adjustment is
appropriate?
A. No dose adjustment needed
B. Dose reduction by 50%
C. Contraindicated; use unfractionated heparin
D. Increase dose due to altered protein binding
Answer: C.
Rationale: Enoxaparin is renally cleared. In severe CKD (CrCl <30
mL/min), it is generally avoided or used with extreme caution;
unfractionated heparin is preferred due to shorter half-life and
reversibility.
, 6. A patient on a monoamine oxidase inhibitor (MAOI) eats aged
cheese and develops severe hypertension. What is the
mechanism?
A. Tyramine-induced norepinephrine release
B. Direct alpha-1 agonism
C. Serotonin syndrome
D. Anticholinergic crisis
Answer: A.
Rationale: MAOIs block metabolism of tyramine, which is present
in aged cheese. Tyramine enters nerve terminals and causes
massive norepinephrine release → hypertensive crisis.
7. Which medication requires a “black box warning” for increased
risk of suicidal thoughts in young adults?
A. Fluoxetine
B. Venlafaxine
C. Bupropion
D. All of the above
Answer: D.
Rationale: All antidepressants, especially SSRIs and SNRIs, carry a
black box warning for increased suicidality in children,
adolescents, and young adults aged 18–24.
