NU 623 EXAM 200 ACTUAL QUESTIONS AND CORRECT
ANSWERS WITH RATIONALE LATEST 2026 ALREADY
GRADED A+
This comprehensive 200-question bank is designed for the NU 623 Adult
Health exam, covering essential topics in diabetes management,
endocrinology, and related comorbidities. Each question presents a unique,
clinically relevant scenario requiring application of evidence-based guidelines.
Topics include pharmacology (metformin, insulin types, SGLT2 inhibitors,
GLP-1 receptor agonists, sulfonylureas, DPP-4 inhibitors), acute
complications (DKA, HHS, hypoglycemia), chronic complications
(neuropathy, nephropathy, retinopathy, cardiovascular disease), patient
education, foot care, sick-day management, and medication adjustments in
renal impairment. The questions also address hypertension, dyslipidemia,
obesity, and special populations. No questions are repeated, ensuring broad
content coverage for exam preparation.
1. A 45-year-old obese patient with type 2 diabetes is currently on metformin 500
mg twice daily. Routine HbA1c reveals a level of 5.8%. What is the most
appropriate intervention?
A. Add a sulfonylurea
B. Decrease metformin to once daily
C. Increase metformin to 1000 mg twice daily
D. No pharmacologic changes at this time
Answer: D. No pharmacologic changes at this time
Rationale: An HbA1c of 5.8% indicates excellent glycemic control (goal typically
<7%). Metformin is appropriately dosed, and no adjustment is needed. Adding or
increasing medications would risk hypoglycemia without benefit.
2. After administration, the onset of action of lispro (Humalog) occurs in how
long?
A. Less than 30 minutes
B. Approximately 1 hour
C. 1 to 2 hours
D. 3 to 4 hours
Answer: A. Less than 30 minutes
,Rationale: Lispro is a rapid-acting insulin analogue with onset within 15-30
minutes. It should be given immediately before meals to match postprandial
glucose rise.
3. Which medication should be used with caution in a patient with suspected or
known sulfa allergy?
A. Metformin
B. Glyburide
C. Rosiglitazone
D. NPH insulin
Answer: B. Glyburide
Rationale: Glyburide is a sulfonylurea that contains a sulfonamide moiety. Cross-
reactivity with sulfa antibiotics can occur; alternative agents should be considered.
4. The mechanism of action of metformin (Glucophage) is best described as which
of the following?
A. An insulin-production enhancer
B. A product virtually identical in action to sulfonylureas
C. A drug that increases insulin action in peripheral tissues and reduces hepatic
glucose production
D. A facilitator of renal glucose excretion
Answer: C. A drug that increases insulin action in peripheral tissues and reduces
hepatic glucose production
Rationale: Metformin primarily decreases hepatic gluconeogenesis and increases
peripheral insulin sensitivity without stimulating insulin secretion.
5. Hemoglobin A1c best provides information on glucose control over which time
period?
A. 1 to 29 days
B. 21 to 47 days
C. 48 to 63 days
D. 64 to 90 days
Answer: D. 64 to 90 days
Rationale: HbA1c reflects average blood glucose over the preceding 2-3 months
(approximately 120 days) due to the lifespan of red blood cells.
6. In caring for a patient with diabetes mellitus, how often should
microalbuminuria measurement be obtained?
A. Annually if urine protein is present
B. Periodically in relationship to glycemia control
,C. Yearly
D. With each office visit related to DM
Answer: C. Yearly
Rationale: Annual microalbuminuria screening is recommended for early detection
of diabetic nephropathy, allowing for timely intervention with ACE inhibitors or
ARBs.
7. A patient with type 2 diabetes reports waking up with headaches and excessive
sweating. Which of the following is the most likely cause?
A. Dawn phenomenon
B. Somogyi effect
C. Diabetic ketoacidosis
D. Hyperosmolar hyperglycemic state
Answer: B. Somogyi effect
Rationale: The Somogyi effect is rebound hyperglycemia following nocturnal
hypoglycemia, which triggers a counterregulatory hormone surge causing morning
hyperglycemia with accompanying symptoms like sweating and headaches.
8. Which of the following is a contraindication to metformin use?
A. Hypertension
B. Renal disease
C. Obesity
D. Hyperlipidemia
Answer: B. Renal disease
Rationale: Metformin is contraindicated in renal disease due to the risk of lactic
acidosis. It should be avoided when serum creatinine is ≥1.5 mg/dL in males or
≥1.4 mg/dL in females.
9. A patient with newly diagnosed type 2 diabetes has an HbA1c of 9.5%. What is
the most appropriate initial pharmacologic therapy?
A. Lifestyle modification alone
B. Metformin
C. Insulin glargine
D. A GLP-1 receptor agonist
Answer: B. Metformin
Rationale: Metformin is the first-line pharmacologic agent for type 2 diabetes
regardless of HbA1c level at diagnosis, unless contraindicated.
10. Which patient statement indicates an understanding of proper foot care for
diabetes?
, A. "I should soak my feet daily in warm water."
B. "I will use a heating pad to warm my feet at night."
C. "I will trim my own corns and calluses with a razor blade."
D. "I will apply a moisturizing lotion but not between my toes."
Answer: D. "I will apply a moisturizing lotion but not between my toes."
Rationale: Moisturizing prevents dry skin and cracking, but applying lotion
between the toes increases moisture and fungal infection risk. Soaking, heating
pads, and self-trimming calluses are dangerous and can lead to injury and
ulceration.
11. A patient with type 1 diabetes is experiencing nausea, vomiting, abdominal
pain, and fruity breath odor. Which condition is most likely?
A. Hypoglycemia
B. Hyperosmolar hyperglycemic state
C. Diabetic ketoacidosis
D. Lactic acidosis
Answer: C. Diabetic ketoacidosis
Rationale: DKA presents with nausea, vomiting, abdominal pain, and fruity breath
(acetone) due to ketone production from fatty acid breakdown in the absence of
insulin. HHS typically lacks significant ketosis.
12. What is the target HbA1c goal for most nonpregnant adults with diabetes
according to ADA guidelines?
A. Less than 5.5%
B. Less than 6.0%
C. Less than 7.0%
D. Less than 8.0%
Answer: C. Less than 7.0%
Rationale: The ADA recommends an HbA1c goal of less than 7% for most
nonpregnant adults to balance glycemic control with hypoglycemia risk, though
individualization may be appropriate.
13. A patient on insulin glargine (Lantus) asks when the medication peaks. What is
the correct response?
A. It peaks in 1 to 2 hours
B. It peaks in 4 to 6 hours
C. It peaks in 8 to 10 hours
D. It has no pronounced peak
Answer: D. It has no pronounced peak
ANSWERS WITH RATIONALE LATEST 2026 ALREADY
GRADED A+
This comprehensive 200-question bank is designed for the NU 623 Adult
Health exam, covering essential topics in diabetes management,
endocrinology, and related comorbidities. Each question presents a unique,
clinically relevant scenario requiring application of evidence-based guidelines.
Topics include pharmacology (metformin, insulin types, SGLT2 inhibitors,
GLP-1 receptor agonists, sulfonylureas, DPP-4 inhibitors), acute
complications (DKA, HHS, hypoglycemia), chronic complications
(neuropathy, nephropathy, retinopathy, cardiovascular disease), patient
education, foot care, sick-day management, and medication adjustments in
renal impairment. The questions also address hypertension, dyslipidemia,
obesity, and special populations. No questions are repeated, ensuring broad
content coverage for exam preparation.
1. A 45-year-old obese patient with type 2 diabetes is currently on metformin 500
mg twice daily. Routine HbA1c reveals a level of 5.8%. What is the most
appropriate intervention?
A. Add a sulfonylurea
B. Decrease metformin to once daily
C. Increase metformin to 1000 mg twice daily
D. No pharmacologic changes at this time
Answer: D. No pharmacologic changes at this time
Rationale: An HbA1c of 5.8% indicates excellent glycemic control (goal typically
<7%). Metformin is appropriately dosed, and no adjustment is needed. Adding or
increasing medications would risk hypoglycemia without benefit.
2. After administration, the onset of action of lispro (Humalog) occurs in how
long?
A. Less than 30 minutes
B. Approximately 1 hour
C. 1 to 2 hours
D. 3 to 4 hours
Answer: A. Less than 30 minutes
,Rationale: Lispro is a rapid-acting insulin analogue with onset within 15-30
minutes. It should be given immediately before meals to match postprandial
glucose rise.
3. Which medication should be used with caution in a patient with suspected or
known sulfa allergy?
A. Metformin
B. Glyburide
C. Rosiglitazone
D. NPH insulin
Answer: B. Glyburide
Rationale: Glyburide is a sulfonylurea that contains a sulfonamide moiety. Cross-
reactivity with sulfa antibiotics can occur; alternative agents should be considered.
4. The mechanism of action of metformin (Glucophage) is best described as which
of the following?
A. An insulin-production enhancer
B. A product virtually identical in action to sulfonylureas
C. A drug that increases insulin action in peripheral tissues and reduces hepatic
glucose production
D. A facilitator of renal glucose excretion
Answer: C. A drug that increases insulin action in peripheral tissues and reduces
hepatic glucose production
Rationale: Metformin primarily decreases hepatic gluconeogenesis and increases
peripheral insulin sensitivity without stimulating insulin secretion.
5. Hemoglobin A1c best provides information on glucose control over which time
period?
A. 1 to 29 days
B. 21 to 47 days
C. 48 to 63 days
D. 64 to 90 days
Answer: D. 64 to 90 days
Rationale: HbA1c reflects average blood glucose over the preceding 2-3 months
(approximately 120 days) due to the lifespan of red blood cells.
6. In caring for a patient with diabetes mellitus, how often should
microalbuminuria measurement be obtained?
A. Annually if urine protein is present
B. Periodically in relationship to glycemia control
,C. Yearly
D. With each office visit related to DM
Answer: C. Yearly
Rationale: Annual microalbuminuria screening is recommended for early detection
of diabetic nephropathy, allowing for timely intervention with ACE inhibitors or
ARBs.
7. A patient with type 2 diabetes reports waking up with headaches and excessive
sweating. Which of the following is the most likely cause?
A. Dawn phenomenon
B. Somogyi effect
C. Diabetic ketoacidosis
D. Hyperosmolar hyperglycemic state
Answer: B. Somogyi effect
Rationale: The Somogyi effect is rebound hyperglycemia following nocturnal
hypoglycemia, which triggers a counterregulatory hormone surge causing morning
hyperglycemia with accompanying symptoms like sweating and headaches.
8. Which of the following is a contraindication to metformin use?
A. Hypertension
B. Renal disease
C. Obesity
D. Hyperlipidemia
Answer: B. Renal disease
Rationale: Metformin is contraindicated in renal disease due to the risk of lactic
acidosis. It should be avoided when serum creatinine is ≥1.5 mg/dL in males or
≥1.4 mg/dL in females.
9. A patient with newly diagnosed type 2 diabetes has an HbA1c of 9.5%. What is
the most appropriate initial pharmacologic therapy?
A. Lifestyle modification alone
B. Metformin
C. Insulin glargine
D. A GLP-1 receptor agonist
Answer: B. Metformin
Rationale: Metformin is the first-line pharmacologic agent for type 2 diabetes
regardless of HbA1c level at diagnosis, unless contraindicated.
10. Which patient statement indicates an understanding of proper foot care for
diabetes?
, A. "I should soak my feet daily in warm water."
B. "I will use a heating pad to warm my feet at night."
C. "I will trim my own corns and calluses with a razor blade."
D. "I will apply a moisturizing lotion but not between my toes."
Answer: D. "I will apply a moisturizing lotion but not between my toes."
Rationale: Moisturizing prevents dry skin and cracking, but applying lotion
between the toes increases moisture and fungal infection risk. Soaking, heating
pads, and self-trimming calluses are dangerous and can lead to injury and
ulceration.
11. A patient with type 1 diabetes is experiencing nausea, vomiting, abdominal
pain, and fruity breath odor. Which condition is most likely?
A. Hypoglycemia
B. Hyperosmolar hyperglycemic state
C. Diabetic ketoacidosis
D. Lactic acidosis
Answer: C. Diabetic ketoacidosis
Rationale: DKA presents with nausea, vomiting, abdominal pain, and fruity breath
(acetone) due to ketone production from fatty acid breakdown in the absence of
insulin. HHS typically lacks significant ketosis.
12. What is the target HbA1c goal for most nonpregnant adults with diabetes
according to ADA guidelines?
A. Less than 5.5%
B. Less than 6.0%
C. Less than 7.0%
D. Less than 8.0%
Answer: C. Less than 7.0%
Rationale: The ADA recommends an HbA1c goal of less than 7% for most
nonpregnant adults to balance glycemic control with hypoglycemia risk, though
individualization may be appropriate.
13. A patient on insulin glargine (Lantus) asks when the medication peaks. What is
the correct response?
A. It peaks in 1 to 2 hours
B. It peaks in 4 to 6 hours
C. It peaks in 8 to 10 hours
D. It has no pronounced peak
Answer: D. It has no pronounced peak
