what is the therapeutic use of phenytoin
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Nursing Elites

ATI RN

ATI Pharmacology Test Bank

1. What is the therapeutic use of Phenytoin?

Correct answer: C

Rationale: Phenytoin is primarily used to diminish seizure activity and is effective in terminating ventricular arrhythmias. It works by stabilizing neuronal membranes, reducing repetitive neuronal firing, and limiting the spread of seizure activity in the brain. While phenytoin does not have a direct role in preventing thrombus formation or extending existing thrombi, it is crucial in managing seizures and certain arrhythmias.

2. A healthcare professional is reviewing a new prescription for Ondansetron 4 mg PO PRN for nausea and vomiting for a client who has Hyperemesis Gravidarum. The healthcare professional should clarify which of the following parts of the prescription with the provider?

Correct answer: D

Rationale: The prescription provided includes the medication name, dosage, and route of administration. However, it lacks information about the frequency or timing of the medication administration. In this case, it is crucial to clarify the frequency with the provider to ensure the safe and effective use of the medication for the client with Hyperemesis Gravidarum.

3. A client has a new prescription for Digoxin. Which of the following instructions should the nurse provide?

Correct answer: A

Rationale: Clients prescribed Digoxin should monitor their heart rate before each dose. This is essential to identify any potential bradycardia, defined as a heart rate below 60 bpm, which can be a side effect of Digoxin. Any significant changes in heart rate should be reported promptly to the healthcare provider for further evaluation and management. Choice B is incorrect because increasing intake of high-potassium foods can lead to hyperkalemia, a condition that can be exacerbated by Digoxin. Choice C is incorrect as taking Digoxin with a full glass of milk is not necessary. Choice D is incorrect as black, tarry stools are not an expected side effect of Digoxin.

4. A client in the emergency department has Benzodiazepine toxicity due to an overdose. Which of the following actions is the nurse's priority?

Correct answer: B

Rationale: In a situation where a client presents with Benzodiazepine toxicity, the priority action for the nurse is to assess the client. By identifying the client's level of orientation, the nurse can gather crucial information about the client's mental status, which is essential for determining the appropriate care and interventions needed. Administering flumazenil is used to reverse the effects of benzodiazepines but should be based on a comprehensive assessment. Infusing IV fluids and preparing for gastric lavage may be necessary interventions but should follow a thorough assessment of the client's condition to ensure proper prioritization of care.

5. A client has a new prescription for Amiodarone. Which of the following instructions should the nurse include?

Correct answer: B

Rationale: The correct instruction the nurse should include is to advise the client to avoid drinking grapefruit juice while taking Amiodarone. Grapefruit juice can inhibit the metabolism of Amiodarone, leading to increased blood levels of the medication and raising the risk of adverse effects, such as cardiac toxicity. Choices A, C, and D are incorrect. Taking Amiodarone with meals, at bedtime, or increasing intake of sodium-rich foods are not necessary instructions for this medication.

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