1|Page
Pharmacology Made Easy 5 0 The Endocrine System
Test Newest Exam Preparation With Complete
Questions And Correct Answers With Rationales
Already Graded A+Brand New Version!!
1. A patient with type 1 diabetes mellitus is admitted to the emergency
department in diabetic ketoacidosis. Which intravenous fluid and
insulin regimen is most appropriate for initial management?
A) 0.9% normal saline with a continuous intravenous infusion of regular
insulin
B) 0.45% normal saline with a subcutaneous injection of lispro insulin
C) Lactated Ringer's solution with a continuous infusion of NPH insulin
D) 5% dextrose in water with a bolus of glargine insulin
Answer: A
Explanation: Diabetic ketoacidosis requires aggressive fluid
resuscitation with isotonic saline (0.9% NS) to restore intravascular
volume and correct dehydration. Regular insulin is the only insulin
preparation approved for intravenous use due to its rapid onset and
short duration, allowing for precise titration. Subcutaneous insulin is not
appropriate in DKA because of poor peripheral perfusion. NPH and
glargine are not for intravenous use.
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2. A 65-year-old male with hypothyroidism is started on levothyroxine.
What is the most important counseling point regarding administration?
A) Take the medication with food to enhance absorption
B) Take the medication at bedtime to minimize side effects
C) Take the medication on an empty stomach, 30 to 60 minutes before
breakfast
D) Take the medication with a glass of milk to prevent gastric irritation
Answer: C
Explanation: Levothyroxine absorption is significantly impaired by food,
particularly calcium, iron, and fiber. It should be taken consistently on
an empty stomach 30-60 minutes before the first meal of the day to
ensure predictable absorption and therapeutic efficacy. Bedtime
administration is not standard. Milk and food reduce absorption.
3. A patient with Cushing's syndrome is receiving ketoconazole. What is
the primary therapeutic mechanism of this drug in this condition?
A) Inhibition of aldosterone synthesis in the adrenal zona glomerulosa
B) Blockade of glucocorticoid receptors in the peripheral tissues
C) Inhibition of multiple cytochrome P450 enzymes involved in adrenal
steroidogenesis
D) Enhancement of cortisol metabolism in the liver
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Answer: C
Explanation: Ketoconazole is an antifungal agent that also inhibits
several CYP450 enzymes, including CYP11A1 and CYP17, which are
critical for adrenal cortisol synthesis. This makes it useful in managing
hypercortisolism in Cushing's syndrome when surgery is not an option. It
does not directly block receptors or enhance metabolism.
4. Which of the following is a contraindication to the use of
propylthiouracil in the treatment of hyperthyroidism?
A) Pregnancy in the first trimester
B) History of agranulocytosis
C) Type 2 diabetes mellitus
D) Mild hepatic steatosis
Answer: B
Explanation: Propylthiouracil carries a risk of agranulocytosis, a
potentially fatal drop in neutrophil count. A history of this adverse effect
is an absolute contraindication. PTU is actually preferred in the first
trimester of pregnancy due to lower risk of embryopathy compared to
methimazole, though it is still used cautiously.
5. A patient on long-term corticosteroid therapy for rheumatoid
arthritis presents with sudden onset of severe abdominal pain. What is
the most likely associated complication?
A) Peptic ulcer perforation
, 4|Page
B) Acute pancreatitis
C) Cholecystitis
D) Appendicitis
Answer: A
Explanation: Long-term glucocorticoid use suppresses prostaglandin
synthesis, reducing gastric mucosal protection and increasing the risk of
peptic ulcer disease. The abrupt onset of severe abdominal pain raises
concern for perforation, a medical emergency, because corticosteroids
can mask typical inflammatory signs.
6. A 48-year-old female with osteoporosis is prescribed alendronate.
What instruction is essential for preventing esophageal irritation?
A) Take the medication with a full glass of water and remain upright for
at least 30 minutes
B) Take the medication with orange juice to enhance absorption
C) Crush the tablet and mix with applesauce for easier swallowing
D) Take the medication immediately before lying down for the night
Answer: A
Explanation: Alendronate is a bisphosphonate that can cause severe
esophagitis. Patients must take it with a full glass of plain water and
remain upright for at least 30 minutes to prevent reflux and mucosal
injury. Orange juice, crushing, or lying down increases the risk of
esophageal damage.
Pharmacology Made Easy 5 0 The Endocrine System
Test Newest Exam Preparation With Complete
Questions And Correct Answers With Rationales
Already Graded A+Brand New Version!!
1. A patient with type 1 diabetes mellitus is admitted to the emergency
department in diabetic ketoacidosis. Which intravenous fluid and
insulin regimen is most appropriate for initial management?
A) 0.9% normal saline with a continuous intravenous infusion of regular
insulin
B) 0.45% normal saline with a subcutaneous injection of lispro insulin
C) Lactated Ringer's solution with a continuous infusion of NPH insulin
D) 5% dextrose in water with a bolus of glargine insulin
Answer: A
Explanation: Diabetic ketoacidosis requires aggressive fluid
resuscitation with isotonic saline (0.9% NS) to restore intravascular
volume and correct dehydration. Regular insulin is the only insulin
preparation approved for intravenous use due to its rapid onset and
short duration, allowing for precise titration. Subcutaneous insulin is not
appropriate in DKA because of poor peripheral perfusion. NPH and
glargine are not for intravenous use.
,2|Page
2. A 65-year-old male with hypothyroidism is started on levothyroxine.
What is the most important counseling point regarding administration?
A) Take the medication with food to enhance absorption
B) Take the medication at bedtime to minimize side effects
C) Take the medication on an empty stomach, 30 to 60 minutes before
breakfast
D) Take the medication with a glass of milk to prevent gastric irritation
Answer: C
Explanation: Levothyroxine absorption is significantly impaired by food,
particularly calcium, iron, and fiber. It should be taken consistently on
an empty stomach 30-60 minutes before the first meal of the day to
ensure predictable absorption and therapeutic efficacy. Bedtime
administration is not standard. Milk and food reduce absorption.
3. A patient with Cushing's syndrome is receiving ketoconazole. What is
the primary therapeutic mechanism of this drug in this condition?
A) Inhibition of aldosterone synthesis in the adrenal zona glomerulosa
B) Blockade of glucocorticoid receptors in the peripheral tissues
C) Inhibition of multiple cytochrome P450 enzymes involved in adrenal
steroidogenesis
D) Enhancement of cortisol metabolism in the liver
,3|Page
Answer: C
Explanation: Ketoconazole is an antifungal agent that also inhibits
several CYP450 enzymes, including CYP11A1 and CYP17, which are
critical for adrenal cortisol synthesis. This makes it useful in managing
hypercortisolism in Cushing's syndrome when surgery is not an option. It
does not directly block receptors or enhance metabolism.
4. Which of the following is a contraindication to the use of
propylthiouracil in the treatment of hyperthyroidism?
A) Pregnancy in the first trimester
B) History of agranulocytosis
C) Type 2 diabetes mellitus
D) Mild hepatic steatosis
Answer: B
Explanation: Propylthiouracil carries a risk of agranulocytosis, a
potentially fatal drop in neutrophil count. A history of this adverse effect
is an absolute contraindication. PTU is actually preferred in the first
trimester of pregnancy due to lower risk of embryopathy compared to
methimazole, though it is still used cautiously.
5. A patient on long-term corticosteroid therapy for rheumatoid
arthritis presents with sudden onset of severe abdominal pain. What is
the most likely associated complication?
A) Peptic ulcer perforation
, 4|Page
B) Acute pancreatitis
C) Cholecystitis
D) Appendicitis
Answer: A
Explanation: Long-term glucocorticoid use suppresses prostaglandin
synthesis, reducing gastric mucosal protection and increasing the risk of
peptic ulcer disease. The abrupt onset of severe abdominal pain raises
concern for perforation, a medical emergency, because corticosteroids
can mask typical inflammatory signs.
6. A 48-year-old female with osteoporosis is prescribed alendronate.
What instruction is essential for preventing esophageal irritation?
A) Take the medication with a full glass of water and remain upright for
at least 30 minutes
B) Take the medication with orange juice to enhance absorption
C) Crush the tablet and mix with applesauce for easier swallowing
D) Take the medication immediately before lying down for the night
Answer: A
Explanation: Alendronate is a bisphosphonate that can cause severe
esophagitis. Patients must take it with a full glass of plain water and
remain upright for at least 30 minutes to prevent reflux and mucosal
injury. Orange juice, crushing, or lying down increases the risk of
esophageal damage.
