HESI RN
Pharmacology HESI
1. Tamoxifen is prescribed for the client with metastatic breast carcinoma. The nurse understands that the primary action of this medication is to:
- A. Increase DNA and RNA synthesis.
- B. Promote the biosynthesis of nucleic acids.
- C. Increase estrogen concentration and estrogen response.
- D. Compete with estradiol for binding to estrogen in tissues containing high concentrations of receptors.
Correct answer: D
Rationale: The primary action of tamoxifen, an antineoplastic medication used in metastatic breast carcinoma, is to compete with estradiol for binding to estrogen receptors in tissues with high receptor concentrations. By doing so, tamoxifen reduces DNA synthesis and estrogen response, leading to its therapeutic effect in inhibiting the growth of estrogen-sensitive breast cancer cells.
2. A community health nurse visits a client at home. Prednisone 10 mg orally daily has been prescribed for the client. The nurse reinforces teaching for the client about the medication. Which statement, if made by the client, indicates that further teaching is necessary?
- A. I can take aspirin or my antihistamine if I need it.
- B. I need to take the medication every day at the same time.
- C. I need to avoid coffee, tea, cola, and chocolate in my diet.
- D. If I gain more than 5 pounds a week, I will call my doctor.
Correct answer: A
Rationale: Aspirin and other over-the-counter medications should not be taken without consulting the health care provider (HCP). The client needs to take the medication at the same time every day and avoid caffeine-containing foods and fluids to prevent steroid-ulcer development.
3. A client with hyperlipidemia is prescribed atorvastatin (Lipitor). Which instruction should the nurse include in the teaching plan?
- A. Take the medication in the morning.
- B. Avoid consuming grapefruit juice.
- C. Increase your intake of dairy products.
- D. Take the medication with food.
Correct answer: B
Rationale: The correct instruction for the nurse to include in the teaching plan is to advise the client to avoid consuming grapefruit juice. Grapefruit juice can increase the risk of atorvastatin (Lipitor) toxicity by inhibiting its metabolism. Atorvastatin is typically taken in the evening as cholesterol synthesis occurs at night. Increasing dairy intake is not specifically recommended for atorvastatin therapy, and the medication can be taken with or without food.
4. The client has a PRN prescription for ondansetron (Zofran). For which condition should this medication be administered to the postoperative client?
- A. Paralytic ileus
- B. Incisional pain
- C. Urinary retention
- D. Nausea and vomiting
Correct answer: D
Rationale: Ondansetron, also known as Zofran, is an antiemetic medication primarily used to treat nausea and vomiting. In the postoperative setting, it is commonly administered to manage postoperative nausea and vomiting, which are frequent occurrences after surgery. Ondansetron works by blocking serotonin, a natural substance in the body that can trigger nausea and vomiting. It is also utilized to manage chemotherapy-induced nausea and vomiting. Therefore, the correct condition for which ondansetron should be administered to the postoperative client is nausea and vomiting.
5. The client with acute myelocytic leukemia is being treated with busulfan (Myleran). Which laboratory value should the nurse specifically monitor during treatment with this medication?
- A. Clotting time
- B. Uric acid level
- C. Potassium level
- D. Blood glucose level
Correct answer: B
Rationale: The correct answer is B, Uric acid level. Busulfan can cause an increase in uric acid levels, leading to hyperuricemia, renal stones, and acute renal failure. Monitoring uric acid levels is crucial to detect and manage potential complications associated with busulfan therapy.
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