CHAMBERLAIN UNIVERSITY – NR 565 ADVANCED
PHARMACOLOGY FUNDAMENTALS FINAL EXAM –
QUESTIONS AND ANSWERS | 2026/2027 LATEST
UPDATE
SECTION 1: PHARMACOTHERAPY FOR ENDOCRINE DISORDERS
Questions 1–30
1. A patient beginning levothyroxine therapy asks when the medication should be taken for
optimal absorption. What instruction is most appropriate?
A) Take it with breakfast containing high-fiber cereal.
B) Take it in the morning on an empty stomach, 30–60 minutes before breakfast.
C) Take it immediately after dinner with calcium-containing foods.
D) Take it only when symptoms of hypothyroidism occur.
Correct Answer: Take it in the morning on an empty stomach, 30–60 minutes before
breakfast.
Rationale: Levothyroxine absorption is reduced by food and several supplements or medications.
Taking it consistently on an empty stomach before breakfast promotes predictable absorption
and stable thyroid replacement. Calcium, iron, and other interfering products should generally
be separated from levothyroxine by several hours. Consistency is especially important because
thyroid replacement requires precise dosing.
2. Which laboratory test is most useful for monitoring replacement therapy in a patient
with primary hypothyroidism?
A) Serum cortisol
B) Serum TSH
C) Serum aldosterone
D) Serum insulin
Correct Answer: Serum TSH
Rationale: TSH is the principal laboratory marker used to monitor levothyroxine therapy in most
patients with primary hypothyroidism. It reflects the pituitary response to circulating thyroid
hormone and helps determine whether the dose is adequate. TSH is generally reassessed about
,6–8 weeks after initiation or a dosage change because thyroid hormone levels require time to
stabilize.
3. Which adverse effect should a patient taking methimazole report immediately?
A) Mild appetite increase
B) Occasional thirst
C) Fever and sore throat
D) Mild temporary fatigue
Correct Answer: Fever and sore throat
Rationale: Methimazole can rarely cause agranulocytosis, a potentially serious reduction in
neutrophils. Fever and sore throat may be early manifestations of infection associated with
neutropenia and require prompt evaluation with a blood count. Patients should be instructed to
report these symptoms rather than simply continuing therapy and waiting for them to resolve.
4. Radioactive iodine therapy for hyperthyroidism requires which important patient
consideration?
A) It is appropriate during pregnancy.
B) It is routinely used during breastfeeding.
C) It immediately restores normal thyroid function.
D) It can produce delayed hypothyroidism.
Correct Answer: It can produce delayed hypothyroidism.
Rationale: Radioactive iodine destroys thyroid tissue and therefore can eventually reduce
thyroid hormone production below normal. Hypothyroidism is a common long-term consequence
and may require lifelong levothyroxine replacement. The therapeutic effect is not immediate, so
patients should understand that thyroid function and symptoms may take weeks or months to
change.
5. A patient taking levothyroxine also uses calcium carbonate daily. What is the best
administration instruction?
A) Take calcium and levothyroxine at the same time.
B) Take calcium only when hypothyroid symptoms appear.
C) Separate calcium administration from levothyroxine by several hours.
D) Double the levothyroxine dose when taking calcium.
,Correct Answer: Separate calcium administration from levothyroxine by several hours.
Rationale: Calcium can significantly reduce gastrointestinal absorption of levothyroxine.
Separating the products allows the thyroid medication to be absorbed more consistently and
reduces the risk of inadequate replacement. Similar precautions apply to iron, magnesium-
containing products, some antacids, and other agents that interfere with levothyroxine
absorption.
6. Which finding is most consistent with excessive levothyroxine replacement?
A) Bradycardia and cold intolerance
B) Tachycardia and heat intolerance
C) Weight gain and constipation
D) Slow speech and lethargy
Correct Answer: Tachycardia and heat intolerance
Rationale: Excess thyroid hormone produces symptoms resembling hyperthyroidism.
Tachycardia, tremor, sweating, nervousness, insomnia, and heat intolerance can indicate
excessive replacement. Persistent overtreatment is particularly concerning in older adults
because it may contribute to atrial fibrillation and accelerated bone loss. Dosage reassessment
should be guided by clinical findings and laboratory results.
7. Which statement best describes the mechanism of methimazole?
A) It directly replaces deficient thyroid hormone.
B) It destroys thyroid tissue through radiation.
C) It inhibits thyroid hormone synthesis.
D) It stimulates TSH secretion.
Correct Answer: It inhibits thyroid hormone synthesis.
Rationale: Methimazole inhibits thyroid peroxidase, reducing oxidation of iodide, incorporation
of iodine into tyrosine residues, and coupling reactions involved in thyroid hormone synthesis. It
does not destroy stored thyroid hormone immediately, so therapeutic improvement takes time.
This mechanism makes methimazole useful for controlling hyperthyroidism while the underlying
condition is being managed.
8. Which patient should generally avoid radioactive iodine therapy?
A) A nonpregnant adult with Graves disease
B) A patient with mild seasonal allergies
, C) An adult with controlled hypertension
D) A pregnant patient with hyperthyroidism
Correct Answer: A pregnant patient with hyperthyroidism
Rationale: Radioactive iodine crosses biological barriers and can damage fetal thyroid tissue. It
is therefore contraindicated during pregnancy and is also avoided during breastfeeding.
Alternative treatment is selected based on gestational status, disease severity, and other clinical
factors. Appropriate counseling is essential before radioactive iodine is administered.
9. A patient with type 2 diabetes is starting metformin. Which adverse effect is particularly
important to discuss?
A) Severe hypothermia
B) Gastrointestinal upset
C) Permanent hearing loss
D) Profound hypercalcemia
Correct Answer: Gastrointestinal upset
Rationale: Gastrointestinal effects such as nausea, abdominal discomfort, diarrhea, and reduced
appetite are common when metformin is initiated. Taking the medication with food and gradually
increasing the dose can improve tolerance. Metformin is not typically associated with
hypoglycemia when used alone because it does not directly stimulate pancreatic insulin release.
10. What is the primary mechanism of metformin in type 2 diabetes?
A) It increases hepatic glucose production.
B) It increases renal glucose reabsorption.
C) It reduces hepatic glucose production and improves insulin sensitivity.
D) It directly replaces endogenous insulin.
Correct Answer: It reduces hepatic glucose production and improves insulin sensitivity.
Rationale: Metformin primarily decreases hepatic gluconeogenesis and improves peripheral
insulin sensitivity. This lowers blood glucose without directly stimulating pancreatic insulin
secretion. Because its glucose-lowering action is glucose dependent rather than insulin
secretagogue based, metformin alone generally has a low risk of causing hypoglycemia.
PHARMACOLOGY FUNDAMENTALS FINAL EXAM –
QUESTIONS AND ANSWERS | 2026/2027 LATEST
UPDATE
SECTION 1: PHARMACOTHERAPY FOR ENDOCRINE DISORDERS
Questions 1–30
1. A patient beginning levothyroxine therapy asks when the medication should be taken for
optimal absorption. What instruction is most appropriate?
A) Take it with breakfast containing high-fiber cereal.
B) Take it in the morning on an empty stomach, 30–60 minutes before breakfast.
C) Take it immediately after dinner with calcium-containing foods.
D) Take it only when symptoms of hypothyroidism occur.
Correct Answer: Take it in the morning on an empty stomach, 30–60 minutes before
breakfast.
Rationale: Levothyroxine absorption is reduced by food and several supplements or medications.
Taking it consistently on an empty stomach before breakfast promotes predictable absorption
and stable thyroid replacement. Calcium, iron, and other interfering products should generally
be separated from levothyroxine by several hours. Consistency is especially important because
thyroid replacement requires precise dosing.
2. Which laboratory test is most useful for monitoring replacement therapy in a patient
with primary hypothyroidism?
A) Serum cortisol
B) Serum TSH
C) Serum aldosterone
D) Serum insulin
Correct Answer: Serum TSH
Rationale: TSH is the principal laboratory marker used to monitor levothyroxine therapy in most
patients with primary hypothyroidism. It reflects the pituitary response to circulating thyroid
hormone and helps determine whether the dose is adequate. TSH is generally reassessed about
,6–8 weeks after initiation or a dosage change because thyroid hormone levels require time to
stabilize.
3. Which adverse effect should a patient taking methimazole report immediately?
A) Mild appetite increase
B) Occasional thirst
C) Fever and sore throat
D) Mild temporary fatigue
Correct Answer: Fever and sore throat
Rationale: Methimazole can rarely cause agranulocytosis, a potentially serious reduction in
neutrophils. Fever and sore throat may be early manifestations of infection associated with
neutropenia and require prompt evaluation with a blood count. Patients should be instructed to
report these symptoms rather than simply continuing therapy and waiting for them to resolve.
4. Radioactive iodine therapy for hyperthyroidism requires which important patient
consideration?
A) It is appropriate during pregnancy.
B) It is routinely used during breastfeeding.
C) It immediately restores normal thyroid function.
D) It can produce delayed hypothyroidism.
Correct Answer: It can produce delayed hypothyroidism.
Rationale: Radioactive iodine destroys thyroid tissue and therefore can eventually reduce
thyroid hormone production below normal. Hypothyroidism is a common long-term consequence
and may require lifelong levothyroxine replacement. The therapeutic effect is not immediate, so
patients should understand that thyroid function and symptoms may take weeks or months to
change.
5. A patient taking levothyroxine also uses calcium carbonate daily. What is the best
administration instruction?
A) Take calcium and levothyroxine at the same time.
B) Take calcium only when hypothyroid symptoms appear.
C) Separate calcium administration from levothyroxine by several hours.
D) Double the levothyroxine dose when taking calcium.
,Correct Answer: Separate calcium administration from levothyroxine by several hours.
Rationale: Calcium can significantly reduce gastrointestinal absorption of levothyroxine.
Separating the products allows the thyroid medication to be absorbed more consistently and
reduces the risk of inadequate replacement. Similar precautions apply to iron, magnesium-
containing products, some antacids, and other agents that interfere with levothyroxine
absorption.
6. Which finding is most consistent with excessive levothyroxine replacement?
A) Bradycardia and cold intolerance
B) Tachycardia and heat intolerance
C) Weight gain and constipation
D) Slow speech and lethargy
Correct Answer: Tachycardia and heat intolerance
Rationale: Excess thyroid hormone produces symptoms resembling hyperthyroidism.
Tachycardia, tremor, sweating, nervousness, insomnia, and heat intolerance can indicate
excessive replacement. Persistent overtreatment is particularly concerning in older adults
because it may contribute to atrial fibrillation and accelerated bone loss. Dosage reassessment
should be guided by clinical findings and laboratory results.
7. Which statement best describes the mechanism of methimazole?
A) It directly replaces deficient thyroid hormone.
B) It destroys thyroid tissue through radiation.
C) It inhibits thyroid hormone synthesis.
D) It stimulates TSH secretion.
Correct Answer: It inhibits thyroid hormone synthesis.
Rationale: Methimazole inhibits thyroid peroxidase, reducing oxidation of iodide, incorporation
of iodine into tyrosine residues, and coupling reactions involved in thyroid hormone synthesis. It
does not destroy stored thyroid hormone immediately, so therapeutic improvement takes time.
This mechanism makes methimazole useful for controlling hyperthyroidism while the underlying
condition is being managed.
8. Which patient should generally avoid radioactive iodine therapy?
A) A nonpregnant adult with Graves disease
B) A patient with mild seasonal allergies
, C) An adult with controlled hypertension
D) A pregnant patient with hyperthyroidism
Correct Answer: A pregnant patient with hyperthyroidism
Rationale: Radioactive iodine crosses biological barriers and can damage fetal thyroid tissue. It
is therefore contraindicated during pregnancy and is also avoided during breastfeeding.
Alternative treatment is selected based on gestational status, disease severity, and other clinical
factors. Appropriate counseling is essential before radioactive iodine is administered.
9. A patient with type 2 diabetes is starting metformin. Which adverse effect is particularly
important to discuss?
A) Severe hypothermia
B) Gastrointestinal upset
C) Permanent hearing loss
D) Profound hypercalcemia
Correct Answer: Gastrointestinal upset
Rationale: Gastrointestinal effects such as nausea, abdominal discomfort, diarrhea, and reduced
appetite are common when metformin is initiated. Taking the medication with food and gradually
increasing the dose can improve tolerance. Metformin is not typically associated with
hypoglycemia when used alone because it does not directly stimulate pancreatic insulin release.
10. What is the primary mechanism of metformin in type 2 diabetes?
A) It increases hepatic glucose production.
B) It increases renal glucose reabsorption.
C) It reduces hepatic glucose production and improves insulin sensitivity.
D) It directly replaces endogenous insulin.
Correct Answer: It reduces hepatic glucose production and improves insulin sensitivity.
Rationale: Metformin primarily decreases hepatic gluconeogenesis and improves peripheral
insulin sensitivity. This lowers blood glucose without directly stimulating pancreatic insulin
secretion. Because its glucose-lowering action is glucose dependent rather than insulin
secretagogue based, metformin alone generally has a low risk of causing hypoglycemia.
