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 client is prescribed phenytoin (Dilantin) for seizure control. Which statement by the client indicates an understanding of the medication?
- A. I should brush and floss my teeth regularly.
- B. I should take the medication with antacids.
- C. I can stop taking the medication once my seizures are controlled.
- D. I should avoid drinking milk while taking this medication.
Correct answer: A
Rationale: The correct statement is 'I should brush and floss my teeth regularly.' Phenytoin (Dilantin) can cause gingival hyperplasia, so maintaining good oral hygiene is essential. Taking the medication with antacids can affect its absorption, so it should not be done. It is crucial not to stop taking the medication abruptly, even if seizures are controlled. There is no specific requirement to avoid milk while taking phenytoin (Dilantin).
3. The client with small cell lung cancer is being treated with etoposide (VePesid). The nurse assisting in caring for the client during its administration understands that which side effect is specifically associated with this medication?
- A. Alopecia
- B. Chest pain
- C. Pulmonary fibrosis
- D. Orthostatic hypotension
Correct answer: D
Rationale: The correct answer is 'D: Orthostatic hypotension.' Etoposide is associated with orthostatic hypotension, a sudden drop in blood pressure that can occur when transitioning from lying down to standing up. It is important for the nurse to monitor the client's blood pressure during the infusion to detect and manage this potential side effect.
4. A client with coronary artery disease complains of substernal chest pain. After checking the client's heart rate and blood pressure, a nurse administers nitroglycerin, 0.4 mg, sublingually. After 5 minutes, the client states, 'My chest still hurts.' Select the appropriate actions that the nurse should take.
- A. Call a code blue.
- B. Contact the registered nurse.
- C. Contact the client's family.
- D. Assess the client's pain level.
Correct answer: B
Rationale: The correct action for the nurse to take in this situation is to contact the registered nurse. When a client with coronary artery disease experiences chest pain and does not achieve relief after the initial administration of nitroglycerin, it is crucial to inform the registered nurse promptly. Following the usual guideline for nitroglycerin administration, the nurse may administer a second tablet after assessing the client's pain level. The nurse should continue to assess the client's pain and monitor vital signs before each dose administration. Calling a code blue is not warranted at this point, as the client's condition does not indicate an immediate life-threatening emergency. Contacting the client's family is not necessary unless requested by the client.
5. Before administering Methylergonovine (Methergine) to a client with postpartum hemorrhage caused by uterine atony, the nurse checks which of the following as the important client parameter?
- A. Temperature
- B. Lochial flow
- C. Urine output
- D. Blood pressure
Correct answer: D
Rationale: Methylergonovine (Methergine) acts by stimulating uterine contractions and causing vasoconstriction. As vasoconstriction can potentially impact blood pressure, it is crucial to check the client's blood pressure before administering Methylergonovine to monitor for any hypertensive effects.
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