Ati Pharmacology Cms Proctored
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. A client with persistent atrial fibrillation is prescribed apixaban for stroke
prevention. The client develops acute kidney injury with a creatinine
clearance of 25 mL/min. Which adjustment to the anticoagulation regimen
is most appropriate?
A. Increase the apixaban dose to compensate for reduced renal clearance.
B. Continue the current apixaban dose but monitor for signs of bleeding.
C. Switch to warfarin with a target INR of 2.0 to 3.0.
D. Reduce the apixaban dose as per renal dosing guidelines.
Answer: D
Rationale: Apixaban is partially renally eliminated, and current guidelines
recommend a dose reduction in patients with at least two of the following: age
≥80 years, body weight ≤60 kg, or serum creatinine ≥1.5 mg/dL. In severe renal
impairment (CrCl 15-29 mL/min), the manufacturer recommends a reduced
dose. Increasing the dose would increase bleeding risk, while warfarin is not the
automatic next choice without assessing the patient's overall thromboembolic
risk and stability. Continuing the current dose without adjustment could lead to
accumulation and bleeding.
2. A nurse is providing education to a client prescribed phenelzine for
depression. The client asks about dietary restrictions. Which statement by
the client indicates a correct understanding of the teaching?
A. I can have a glass of red wine with dinner as long as I limit it to one glass.
, B. I need to avoid aged cheeses and cured meats because they can cause a
dangerous increase in blood pressure.
C. I should avoid grapefruit juice while taking this medication.
D. I must limit my intake of chocolate and caffeine to one serving per day.
Answer: B
Rationale: Phenelzine is a monoamine oxidase inhibitor (MAOI). It inhibits the
breakdown of tyramine, which is found in high concentrations in aged cheeses,
cured meats, and fermented products. Ingestion of these foods can precipitate a
hypertensive crisis. Red wine, grapefruit juice, and chocolate are not the primary
concerns for a hypertensive crisis with MAOIs, though grapefruit juice interacts
with many other medications. The focus of dietary teaching for an MAOI is
strictly avoiding tyramine-rich foods.
3. A client on a medical-surgical unit is receiving IV vancomycin for a
methicillin-resistant Staphylococcus aureus (MRSA) infection. Which
assessment finding is a priority for the nurse to report to the healthcare
provider?
A. A serum trough level of 18 mcg/mL.
B. A red rash on the face and upper torso during the infusion.
C. A serum creatinine level of 1.8 mg/dL.
D. A complaint of mild tinnitus.
Answer: C
Rationale: Vancomycin is nephrotoxic. A serum creatinine of 1.8 mg/dL indicates
significant renal impairment, which is a potentially serious adverse effect
requiring immediate dose adjustment or discontinuation. A trough level of 18
mcg/mL is within the target therapeutic range (10-20 mcg/mL) for most serious
infections. "Red Man Syndrome" (rash on face/upper torso) is an infusion-
related reaction that, while uncomfortable, is not typically life-threatening and
can be managed by slowing the infusion or premedicating with antihistamines.
Mild tinnitus is an early sign of ototoxicity but is less immediately life-
threatening than nephrotoxicity.
, 4. A client is prescribed clozapine for treatment-resistant schizophrenia. The
nurse is monitoring for adverse effects. Which laboratory parameter is the
most critical to monitor at baseline and throughout therapy?
A. Serum potassium levels.
B. Complete blood count with differential.
C. Hepatic function panel.
D. Thyroid-stimulating hormone level.
Answer: B
Rationale: Clozapine has a black box warning for severe neutropenia and
agranulocytosis. The absolute neutrophil count (ANC) must be monitored at
baseline and then regularly according to a specific REMS protocol to prevent
fatal infections. Monitoring potassium, hepatic function, and thyroid levels are
not the primary, life-threatening concerns associated with clozapine therapy.
5. A nurse is preparing to administer digoxin to a client with heart failure.
Which assessment finding would prompt the nurse to withhold the dose
and notify the healthcare provider?
A. Apical heart rate of 68 beats per minute.
B. Serum digoxin level of 1.8 ng/mL.
C. Serum potassium level of 3.1 mEq/L.
D. Blood pressure of 110/70 mm Hg.
Answer: C
Rationale: Hypokalemia increases the risk of digoxin toxicity by enhancing the
binding of digoxin to the sodium-potassium ATPase pump. The normal serum
potassium range is 3.5-5.0 mEq/L. A level of 3.1 mEq/L is low and a significant
risk factor. An apical heart rate of 68 is within the acceptable range for holding
digoxin (usually <60 bpm). A digoxin level of 1.8 ng/mL is within the therapeutic
range (0.8-2.0 ng/mL). A blood pressure of 110/70 is stable and not an
immediate contraindication.
6. A client is started on a continuous infusion of heparin for a deep vein
thrombosis. The activated partial thromboplastin time (aPTT) drawn 6 hours
after the infusion began is 45 seconds. The client's baseline aPTT is 25
, seconds. What is the nurse's priority action?
A. Decrease the heparin infusion rate by 2 units/kg/hr.
B. Increase the heparin infusion rate according to the facility's protocol.
C. Continue the infusion at the current rate and redraw the aPTT in 6 hours.
D. Stop the infusion and administer protamine sulfate.
Answer: B
Rationale: The therapeutic goal for a continuous heparin infusion is an aPTT that
is 1.5 to 2.5 times the control value. With a baseline of 25 seconds, the
therapeutic range is 37.5 to 62.5 seconds. An aPTT of 45 seconds is
subtherapeutic and requires an increase in the infusion rate. Continuing at the
same rate would not achieve therapeutic anticoagulation. Decreasing the rate
or stopping the infusion would increase the risk of clot progression.
7. A client is prescribed diltiazem for angina. The client is also taking
metoprolol. The nurse should monitor the client most closely for which
adverse effect?
A. Hypotension and bradycardia.
B. Hyperglycemia.
C. Bronchospasm.
D. QT interval prolongation.
Answer: A
Rationale: Diltiazem is a nondihydropyridine calcium channel blocker that has
negative chronotropic and inotropic effects. Metoprolol is a beta-blocker with
similar effects on heart rate and contractility. Combined use significantly
increases the risk of bradycardia, heart block, and hypotension. Hyperglycemia
is more common with non-selective beta-blockers, but metoprolol is
cardioselective. Bronchospasm is a risk with non-selective beta-blockers, less so
with metoprolol. QT prolongation is more commonly associated with other
antiarrhythmics, not this combination.
8. A client with type 1 diabetes mellitus is prescribed a basal-bolus insulin
regimen. Which insulin is correctly paired with its expected onset and
duration of action?
Examination Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. A client with persistent atrial fibrillation is prescribed apixaban for stroke
prevention. The client develops acute kidney injury with a creatinine
clearance of 25 mL/min. Which adjustment to the anticoagulation regimen
is most appropriate?
A. Increase the apixaban dose to compensate for reduced renal clearance.
B. Continue the current apixaban dose but monitor for signs of bleeding.
C. Switch to warfarin with a target INR of 2.0 to 3.0.
D. Reduce the apixaban dose as per renal dosing guidelines.
Answer: D
Rationale: Apixaban is partially renally eliminated, and current guidelines
recommend a dose reduction in patients with at least two of the following: age
≥80 years, body weight ≤60 kg, or serum creatinine ≥1.5 mg/dL. In severe renal
impairment (CrCl 15-29 mL/min), the manufacturer recommends a reduced
dose. Increasing the dose would increase bleeding risk, while warfarin is not the
automatic next choice without assessing the patient's overall thromboembolic
risk and stability. Continuing the current dose without adjustment could lead to
accumulation and bleeding.
2. A nurse is providing education to a client prescribed phenelzine for
depression. The client asks about dietary restrictions. Which statement by
the client indicates a correct understanding of the teaching?
A. I can have a glass of red wine with dinner as long as I limit it to one glass.
, B. I need to avoid aged cheeses and cured meats because they can cause a
dangerous increase in blood pressure.
C. I should avoid grapefruit juice while taking this medication.
D. I must limit my intake of chocolate and caffeine to one serving per day.
Answer: B
Rationale: Phenelzine is a monoamine oxidase inhibitor (MAOI). It inhibits the
breakdown of tyramine, which is found in high concentrations in aged cheeses,
cured meats, and fermented products. Ingestion of these foods can precipitate a
hypertensive crisis. Red wine, grapefruit juice, and chocolate are not the primary
concerns for a hypertensive crisis with MAOIs, though grapefruit juice interacts
with many other medications. The focus of dietary teaching for an MAOI is
strictly avoiding tyramine-rich foods.
3. A client on a medical-surgical unit is receiving IV vancomycin for a
methicillin-resistant Staphylococcus aureus (MRSA) infection. Which
assessment finding is a priority for the nurse to report to the healthcare
provider?
A. A serum trough level of 18 mcg/mL.
B. A red rash on the face and upper torso during the infusion.
C. A serum creatinine level of 1.8 mg/dL.
D. A complaint of mild tinnitus.
Answer: C
Rationale: Vancomycin is nephrotoxic. A serum creatinine of 1.8 mg/dL indicates
significant renal impairment, which is a potentially serious adverse effect
requiring immediate dose adjustment or discontinuation. A trough level of 18
mcg/mL is within the target therapeutic range (10-20 mcg/mL) for most serious
infections. "Red Man Syndrome" (rash on face/upper torso) is an infusion-
related reaction that, while uncomfortable, is not typically life-threatening and
can be managed by slowing the infusion or premedicating with antihistamines.
Mild tinnitus is an early sign of ototoxicity but is less immediately life-
threatening than nephrotoxicity.
, 4. A client is prescribed clozapine for treatment-resistant schizophrenia. The
nurse is monitoring for adverse effects. Which laboratory parameter is the
most critical to monitor at baseline and throughout therapy?
A. Serum potassium levels.
B. Complete blood count with differential.
C. Hepatic function panel.
D. Thyroid-stimulating hormone level.
Answer: B
Rationale: Clozapine has a black box warning for severe neutropenia and
agranulocytosis. The absolute neutrophil count (ANC) must be monitored at
baseline and then regularly according to a specific REMS protocol to prevent
fatal infections. Monitoring potassium, hepatic function, and thyroid levels are
not the primary, life-threatening concerns associated with clozapine therapy.
5. A nurse is preparing to administer digoxin to a client with heart failure.
Which assessment finding would prompt the nurse to withhold the dose
and notify the healthcare provider?
A. Apical heart rate of 68 beats per minute.
B. Serum digoxin level of 1.8 ng/mL.
C. Serum potassium level of 3.1 mEq/L.
D. Blood pressure of 110/70 mm Hg.
Answer: C
Rationale: Hypokalemia increases the risk of digoxin toxicity by enhancing the
binding of digoxin to the sodium-potassium ATPase pump. The normal serum
potassium range is 3.5-5.0 mEq/L. A level of 3.1 mEq/L is low and a significant
risk factor. An apical heart rate of 68 is within the acceptable range for holding
digoxin (usually <60 bpm). A digoxin level of 1.8 ng/mL is within the therapeutic
range (0.8-2.0 ng/mL). A blood pressure of 110/70 is stable and not an
immediate contraindication.
6. A client is started on a continuous infusion of heparin for a deep vein
thrombosis. The activated partial thromboplastin time (aPTT) drawn 6 hours
after the infusion began is 45 seconds. The client's baseline aPTT is 25
, seconds. What is the nurse's priority action?
A. Decrease the heparin infusion rate by 2 units/kg/hr.
B. Increase the heparin infusion rate according to the facility's protocol.
C. Continue the infusion at the current rate and redraw the aPTT in 6 hours.
D. Stop the infusion and administer protamine sulfate.
Answer: B
Rationale: The therapeutic goal for a continuous heparin infusion is an aPTT that
is 1.5 to 2.5 times the control value. With a baseline of 25 seconds, the
therapeutic range is 37.5 to 62.5 seconds. An aPTT of 45 seconds is
subtherapeutic and requires an increase in the infusion rate. Continuing at the
same rate would not achieve therapeutic anticoagulation. Decreasing the rate
or stopping the infusion would increase the risk of clot progression.
7. A client is prescribed diltiazem for angina. The client is also taking
metoprolol. The nurse should monitor the client most closely for which
adverse effect?
A. Hypotension and bradycardia.
B. Hyperglycemia.
C. Bronchospasm.
D. QT interval prolongation.
Answer: A
Rationale: Diltiazem is a nondihydropyridine calcium channel blocker that has
negative chronotropic and inotropic effects. Metoprolol is a beta-blocker with
similar effects on heart rate and contractility. Combined use significantly
increases the risk of bradycardia, heart block, and hypotension. Hyperglycemia
is more common with non-selective beta-blockers, but metoprolol is
cardioselective. Bronchospasm is a risk with non-selective beta-blockers, less so
with metoprolol. QT prolongation is more commonly associated with other
antiarrhythmics, not this combination.
8. A client with type 1 diabetes mellitus is prescribed a basal-bolus insulin
regimen. Which insulin is correctly paired with its expected onset and
duration of action?
