HESI RN
HESI Pharmacology Practice Exam
1. The camp nurse asks the children preparing to swim in the lake if they have applied sunscreen. The nurse reminds the children that chemical sunscreens are most effective when applied:
- A. Immediately before swimming
- B. 15 minutes before exposure to the sun
- C. Immediately before exposure to the sun
- D. At least 30 minutes before exposure to the sun
Correct answer: D
Rationale: Chemical sunscreens are most effective when applied at least 30 minutes before exposure to the sun to allow them to penetrate the skin and provide optimal protection. Applying sunscreen immediately before swimming (Choice A) or immediately before exposure to the sun (Choice C) may not provide sufficient time for the sunscreen to be absorbed and offer proper protection. Applying sunscreen 15 minutes before sun exposure (Choice B) is also not ideal as it may not allow enough time for the sunscreen to work effectively. Therefore, the correct answer is to apply chemical sunscreen at least 30 minutes before exposure to the sun to ensure it can be absorbed and offer the intended protection. It is important to reapply sunscreen after swimming or sweating to maintain its effectiveness.
2. A client is being taught about the use of enoxaparin (Lovenox) for the prevention of deep vein thrombosis. Which instruction should the nurse include in the teaching plan?
- A. Inject the medication subcutaneously.
- B. Avoid massaging the injection site after administration.
- C. Administer the medication at the same time each day.
- D. Do not expel the air bubble from the syringe before injection.
Correct answer: C
Rationale: Enoxaparin (Lovenox) is administered subcutaneously at the same time each day to maintain consistent blood levels. Injecting the medication into the muscle is incorrect, as it should be given subcutaneously. Massaging the injection site should be avoided to prevent bruising. The air bubble in the prefilled syringe should not be expelled, as it ensures the full dose is administered.
3. A client is receiving furosemide (Lasix) and is being discharged. What should the nurse include in the teaching plan?
- A. Consume potassium-rich foods.
- B. Take the medication in the morning.
- C. Change positions slowly to prevent dizziness.
- D. Maintain an adequate fluid intake.
Correct answer: C
Rationale: The correct answer is to instruct the client to change positions slowly to prevent dizziness. Furosemide (Lasix) is a diuretic that can lead to orthostatic hypotension, causing dizziness. Consuming potassium-rich foods is essential to prevent hypokalemia when taking furosemide. Taking the medication in the morning helps reduce the need for frequent urination at night. Encouraging the client to maintain an adequate fluid intake is crucial to prevent dehydration while on this medication.
4. A client with diabetes mellitus visits a health care clinic. The client's diabetes mellitus was previously well controlled with daily glyburide (DiaBeta). However, the fasting blood glucose level has recently been in the range of 180 to 200 mg/dL. Which medication, if added to the client's regimen, may have contributed to the hyperglycemia?
- A. Prednisone
- B. Phenelzine (Nardil)
- C. Atenolol (Tenormin)
- D. Allopurinol (Zyloprim)
Correct answer: A
Rationale: Prednisone is known to reduce the effectiveness of oral hypoglycemic medications like glyburide and insulin, which can result in hyperglycemia. Therefore, the addition of prednisone to the client's regimen could have contributed to the elevated fasting blood glucose levels observed.
5. A nurse preparing a client for surgery reviews the client's medication record. The client is to be nothing per mouth (NPO) after midnight. Which of the following medications, if noted on the client's record, should the nurse question?
- A. Cyclobenzaprine (Flexeril)
- B. Alendronate (Fosamax)
- C. Allopurinol (Zyloprim)
- D. Prednisone
Correct answer: D
Rationale: Prednisone is a corticosteroid that can cause adrenal atrophy, reducing the body's ability to withstand stress. During surgery, the dosage may need to be adjusted due to its impact on the body's stress response. Choices A, B, and C are not typically contraindicated before surgery and do not have the same potential impact on the body's stress response.
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