1
Diabetes Mellitus NCLEX Test Bank
Questions & Answers 2025
Why Choose This Document?
● Updated and Relevant: Questions compiled from recent and frequently asked NCLEX
exams to ensure you’re studying what matters most.
● Thorough Coverage: Covers all critical areas of Diabetes Mellitus nursing care, including
pathophysiology, management, complications, patient education, and pharmacology.
● Detailed Explanations: Each question includes clear explanations designed to deepen
understanding and improve critical thinking.
● Exam-Ready Format: Multiple-choice questions formatted exactly as in the NCLEX for
effective practice and confidence building.
● Trusted Source: Compiled and reviewed by a Registered Nurse and experienced NCLEX
tutor, ensuring clinical accuracy and educational quality.
Compiled by:
RN, NCLEX Tutor
Dedicated to empowering nursing students to succeed on their licensing exams and excel in
clinical practice.
, 2
Diabetes Mellitus NCLEX Test Bank Questions & Answers 2025
1. Which of the following is the earliest symptom of Type 1 diabetes mellitus?
A. Blurred vision
B. Polyuria
C. Weight gain
D. Fatigue
The answer is: B
Explanation: Polyuria, or frequent urination, is an early symptom of Type 1 diabetes caused by
osmotic diuresis due to high blood glucose levels. Excess glucose in the blood spills into urine,
pulling water along, which increases urine output. This leads to dehydration and polydipsia
(increased thirst). Early recognition of polyuria is crucial for timely diagnosis and treatment of
Type 1 diabetes, preventing complications like diabetic ketoacidosis. Weight gain is uncommon
initially, while blurred vision and fatigue occur later as hyperglycemia persists and affects body
systems.
2. What is the primary goal of diabetic ketoacidosis (DKA) treatment?
A. Administer oral hypoglycemics
B. Correct hyperglycemia and acidosis
C. Restrict fluid intake
D. Provide high-calorie diet
The answer is: B
Explanation: DKA treatment focuses on correcting hyperglycemia, metabolic acidosis, and
dehydration. This involves intravenous insulin to reduce blood glucose, fluid replacement to
restore volume, and electrolyte management, especially potassium. Oral hypoglycemics are
ineffective in emergencies. Restricting fluids worsens dehydration, and high-calorie diets are
inappropriate during acute management. Rapid intervention prevents life-threatening
complications like cerebral edema or cardiac arrhythmias, improving patient outcomes.
3. Which laboratory test is the best indicator of long-term glucose control?
A. Fasting blood glucose
B. Glycosylated hemoglobin (HbA1c)
C. Random blood glucose
D. Oral glucose tolerance test (OGTT)
The answer is: B
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Explanation: HbA1c reflects average blood glucose over the past 2 to 3 months by measuring
the percentage of glucose attached to hemoglobin. It is a reliable indicator of long-term glycemic
control and predicts risks of complications. Fasting and random glucose tests show current
levels but not trends. OGTT diagnoses diabetes but doesn’t track control over time. Monitoring
HbA1c guides therapy adjustments to optimize diabetes management and reduce microvascular
and macrovascular complications.
4. A diabetic patient complains of numbness and tingling in the feet. What is the most
likely cause?
A. Peripheral neuropathy
B. Hyperglycemia
C. Hypoglycemia
D. Diabetic ketoacidosis
The answer is: A
Explanation: Peripheral neuropathy is a common complication of chronic hyperglycemia where
high blood glucose damages peripheral nerves. Symptoms include numbness, tingling, burning
sensations, and loss of sensation, primarily in the feet and hands. It increases risk for injury and
infection due to decreased protective sensation. Hyperglycemia causes the neuropathy but is
not the direct symptom. Hypoglycemia causes different neurological signs, and diabetic
ketoacidosis presents acutely with different symptoms.
5. Which of the following insulin types has the fastest onset of action?
A. Regular insulin
B. NPH insulin
C. Lispro insulin
D. Glargine insulin
The answer is: C
Explanation: Lispro insulin is a rapid-acting insulin analog with an onset of action within 15
minutes, making it ideal for controlling postprandial blood glucose spikes. Regular insulin has a
slower onset (~30 minutes), NPH is intermediate-acting, and glargine is long-acting with no
pronounced peak. Rapid onset insulins provide flexible dosing around meals, improving
glycemic control and reducing hypoglycemia risk.
11. Which of the following is a common symptom of hypoglycemia?
A. Increased thirst
B. Sweating and shakiness
C. Polyuria
D. Blurred vision
Diabetes Mellitus NCLEX Test Bank
Questions & Answers 2025
Why Choose This Document?
● Updated and Relevant: Questions compiled from recent and frequently asked NCLEX
exams to ensure you’re studying what matters most.
● Thorough Coverage: Covers all critical areas of Diabetes Mellitus nursing care, including
pathophysiology, management, complications, patient education, and pharmacology.
● Detailed Explanations: Each question includes clear explanations designed to deepen
understanding and improve critical thinking.
● Exam-Ready Format: Multiple-choice questions formatted exactly as in the NCLEX for
effective practice and confidence building.
● Trusted Source: Compiled and reviewed by a Registered Nurse and experienced NCLEX
tutor, ensuring clinical accuracy and educational quality.
Compiled by:
RN, NCLEX Tutor
Dedicated to empowering nursing students to succeed on their licensing exams and excel in
clinical practice.
, 2
Diabetes Mellitus NCLEX Test Bank Questions & Answers 2025
1. Which of the following is the earliest symptom of Type 1 diabetes mellitus?
A. Blurred vision
B. Polyuria
C. Weight gain
D. Fatigue
The answer is: B
Explanation: Polyuria, or frequent urination, is an early symptom of Type 1 diabetes caused by
osmotic diuresis due to high blood glucose levels. Excess glucose in the blood spills into urine,
pulling water along, which increases urine output. This leads to dehydration and polydipsia
(increased thirst). Early recognition of polyuria is crucial for timely diagnosis and treatment of
Type 1 diabetes, preventing complications like diabetic ketoacidosis. Weight gain is uncommon
initially, while blurred vision and fatigue occur later as hyperglycemia persists and affects body
systems.
2. What is the primary goal of diabetic ketoacidosis (DKA) treatment?
A. Administer oral hypoglycemics
B. Correct hyperglycemia and acidosis
C. Restrict fluid intake
D. Provide high-calorie diet
The answer is: B
Explanation: DKA treatment focuses on correcting hyperglycemia, metabolic acidosis, and
dehydration. This involves intravenous insulin to reduce blood glucose, fluid replacement to
restore volume, and electrolyte management, especially potassium. Oral hypoglycemics are
ineffective in emergencies. Restricting fluids worsens dehydration, and high-calorie diets are
inappropriate during acute management. Rapid intervention prevents life-threatening
complications like cerebral edema or cardiac arrhythmias, improving patient outcomes.
3. Which laboratory test is the best indicator of long-term glucose control?
A. Fasting blood glucose
B. Glycosylated hemoglobin (HbA1c)
C. Random blood glucose
D. Oral glucose tolerance test (OGTT)
The answer is: B
, 3
Explanation: HbA1c reflects average blood glucose over the past 2 to 3 months by measuring
the percentage of glucose attached to hemoglobin. It is a reliable indicator of long-term glycemic
control and predicts risks of complications. Fasting and random glucose tests show current
levels but not trends. OGTT diagnoses diabetes but doesn’t track control over time. Monitoring
HbA1c guides therapy adjustments to optimize diabetes management and reduce microvascular
and macrovascular complications.
4. A diabetic patient complains of numbness and tingling in the feet. What is the most
likely cause?
A. Peripheral neuropathy
B. Hyperglycemia
C. Hypoglycemia
D. Diabetic ketoacidosis
The answer is: A
Explanation: Peripheral neuropathy is a common complication of chronic hyperglycemia where
high blood glucose damages peripheral nerves. Symptoms include numbness, tingling, burning
sensations, and loss of sensation, primarily in the feet and hands. It increases risk for injury and
infection due to decreased protective sensation. Hyperglycemia causes the neuropathy but is
not the direct symptom. Hypoglycemia causes different neurological signs, and diabetic
ketoacidosis presents acutely with different symptoms.
5. Which of the following insulin types has the fastest onset of action?
A. Regular insulin
B. NPH insulin
C. Lispro insulin
D. Glargine insulin
The answer is: C
Explanation: Lispro insulin is a rapid-acting insulin analog with an onset of action within 15
minutes, making it ideal for controlling postprandial blood glucose spikes. Regular insulin has a
slower onset (~30 minutes), NPH is intermediate-acting, and glargine is long-acting with no
pronounced peak. Rapid onset insulins provide flexible dosing around meals, improving
glycemic control and reducing hypoglycemia risk.
11. Which of the following is a common symptom of hypoglycemia?
A. Increased thirst
B. Sweating and shakiness
C. Polyuria
D. Blurred vision
