NR565 | NR565 Advanced Pharmacology
Fundamentals Exam 3 v1 | Questions with Correct
Answers and Expert Explanation for Each Question
| Chamberlain
1. A patient with heart failure is prescribed Lisinopril. Which electrolyte imbalance is
most commonly associated with this medication?
A. Hypokalemia
B. Hyperkalemia
C. Hyponatremia
D. Hypocalcemia
Correct Answer: B
Expert Explanation: ACE inhibitors like Lisinopril block the conversion of
Angiotensin I to Angiotensin II, which leads to decreased aldosterone secretion. This
reduction in aldosterone causes the kidneys to retain potassium while excreting
sodium and water. Therefore, clinicians must monitor serum potassium levels
closely to avoid life-threatening arrhythmias associated with hyperkalemia.
2. Which instruction should a nurse practitioner provide to a patient starting
Levothyroxine for hypothyroidism?
A. Take the medication with a full meal to increase absorption.
,B. Take the medication at bedtime with a glass of milk.
C. Take the medication only when feeling symptomatic.
D. Take the medication on an empty stomach, 30-60 minutes before breakfast.
Correct Answer: D
Expert Explanation: Levothyroxine is best absorbed in an acidic environment and
should be taken on an empty stomach to ensure consistent blood levels. Taking it
with food or calcium-containing products can significantly impair its bioavailability.
Patients are advised to wait at least 30 to 60 minutes before consuming food or
other medications to maintain therapeutic efficacy.
3. A patient with Type 2 Diabetes is prescribed Metformin. What is the most serious,
though rare, adverse effect associated with this drug?
A. Hypoglycemia
B. Lactic Acidosis
C. Weight gain
D. Hepatotoxicity
Correct Answer: B
Expert Explanation: Metformin inhibits mitochondrial oxidation of lactic acid,
which can lead to the accumulation of lactate in the blood. While rare, lactic acidosis
,is a medical emergency with a high mortality rate if not treated promptly. Patients
with renal impairment are at the highest risk, which is why monitoring creatinine
clearance is essential.
4. When prescribing Amiodarone, which of the following baseline tests is NOT
required?
A. Pulmonary function tests
B. Bone density scan
C. Liver function tests
D. Thyroid function tests
Correct Answer: B
Expert Explanation: Amiodarone is associated with significant toxicities in
multiple organ systems, necessitating baseline pulmonary, thyroid, and liver tests. It
contains iodine, which can lead to thyroid dysfunction, and can cause pulmonary
fibrosis or hepatotoxicity. Bone density is not typically affected by Amiodarone
therapy, so a scan is not required.
5. A patient is taking Warfarin for atrial fibrillation. Which lab value is used to monitor
the therapeutic effect?
A. INR
B. Platelet count
, C. PTT
D. HgbA1c
Correct Answer: A
Expert Explanation: The International Normalized Ratio (INR) is the standard
method for monitoring the anticoagulant effect of Warfarin. It provides a consistent
measurement regardless of the reagents used by different laboratories. A typical
therapeutic range for atrial fibrillation is between 2.0 and 3.0.
6. Which class of antihypertensive medications is contraindicated in patients with a
history of bilateral renal artery stenosis?
A. ACE Inhibitors
B. Calcium Channel Blockers
C. Beta Blockers
D. Thiazide Diuretics
Correct Answer: A
Expert Explanation: In patients with bilateral renal artery stenosis, renal perfusion
is highly dependent on the efferent arteriolar vasoconstriction mediated by
Angiotensin II. ACE inhibitors block this mechanism, leading to a sharp decline in
Fundamentals Exam 3 v1 | Questions with Correct
Answers and Expert Explanation for Each Question
| Chamberlain
1. A patient with heart failure is prescribed Lisinopril. Which electrolyte imbalance is
most commonly associated with this medication?
A. Hypokalemia
B. Hyperkalemia
C. Hyponatremia
D. Hypocalcemia
Correct Answer: B
Expert Explanation: ACE inhibitors like Lisinopril block the conversion of
Angiotensin I to Angiotensin II, which leads to decreased aldosterone secretion. This
reduction in aldosterone causes the kidneys to retain potassium while excreting
sodium and water. Therefore, clinicians must monitor serum potassium levels
closely to avoid life-threatening arrhythmias associated with hyperkalemia.
2. Which instruction should a nurse practitioner provide to a patient starting
Levothyroxine for hypothyroidism?
A. Take the medication with a full meal to increase absorption.
,B. Take the medication at bedtime with a glass of milk.
C. Take the medication only when feeling symptomatic.
D. Take the medication on an empty stomach, 30-60 minutes before breakfast.
Correct Answer: D
Expert Explanation: Levothyroxine is best absorbed in an acidic environment and
should be taken on an empty stomach to ensure consistent blood levels. Taking it
with food or calcium-containing products can significantly impair its bioavailability.
Patients are advised to wait at least 30 to 60 minutes before consuming food or
other medications to maintain therapeutic efficacy.
3. A patient with Type 2 Diabetes is prescribed Metformin. What is the most serious,
though rare, adverse effect associated with this drug?
A. Hypoglycemia
B. Lactic Acidosis
C. Weight gain
D. Hepatotoxicity
Correct Answer: B
Expert Explanation: Metformin inhibits mitochondrial oxidation of lactic acid,
which can lead to the accumulation of lactate in the blood. While rare, lactic acidosis
,is a medical emergency with a high mortality rate if not treated promptly. Patients
with renal impairment are at the highest risk, which is why monitoring creatinine
clearance is essential.
4. When prescribing Amiodarone, which of the following baseline tests is NOT
required?
A. Pulmonary function tests
B. Bone density scan
C. Liver function tests
D. Thyroid function tests
Correct Answer: B
Expert Explanation: Amiodarone is associated with significant toxicities in
multiple organ systems, necessitating baseline pulmonary, thyroid, and liver tests. It
contains iodine, which can lead to thyroid dysfunction, and can cause pulmonary
fibrosis or hepatotoxicity. Bone density is not typically affected by Amiodarone
therapy, so a scan is not required.
5. A patient is taking Warfarin for atrial fibrillation. Which lab value is used to monitor
the therapeutic effect?
A. INR
B. Platelet count
, C. PTT
D. HgbA1c
Correct Answer: A
Expert Explanation: The International Normalized Ratio (INR) is the standard
method for monitoring the anticoagulant effect of Warfarin. It provides a consistent
measurement regardless of the reagents used by different laboratories. A typical
therapeutic range for atrial fibrillation is between 2.0 and 3.0.
6. Which class of antihypertensive medications is contraindicated in patients with a
history of bilateral renal artery stenosis?
A. ACE Inhibitors
B. Calcium Channel Blockers
C. Beta Blockers
D. Thiazide Diuretics
Correct Answer: A
Expert Explanation: In patients with bilateral renal artery stenosis, renal perfusion
is highly dependent on the efferent arteriolar vasoconstriction mediated by
Angiotensin II. ACE inhibitors block this mechanism, leading to a sharp decline in
