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 client is taking Sucralfate PO for Peptic Ulcer Disease and has a new prescription for phenytoin to control seizures. Which of the following instructions should the nurse include?

Correct answer: C

Rationale: Sucralfate can interfere with the absorption of phenytoin. To prevent this interaction, the client should allow a 2-hour interval between taking sucralfate and phenytoin. This timing helps to ensure adequate absorption and effectiveness of both medications without compromising therapeutic outcomes. Choices A, B, and D are incorrect because taking an antacid with sucralfate, taking sucralfate with a glass of milk, and chewing sucralfate thoroughly before swallowing do not address the need for a 2-hour interval between these medications to prevent interference with phenytoin absorption.

3. A client has a new prescription for Sucralfate to treat a duodenal ulcer. Which of the following instructions should be included?

Correct answer: C

Rationale: The correct instruction for taking Sucralfate is to take it 1 hour before meals. This timing allows the medication to coat the stomach lining, providing a protective barrier against stomach acid, which aids in healing the duodenal ulcer. Option A is incorrect as it contradicts the correct timing for taking Sucralfate. Option B is not necessary as it does not pertain to how the medication should be taken in relation to meals. Option D is incorrect as chewing the tablet before swallowing is not the correct administration method for Sucralfate.

4. Which of the following conditions is not typically treated with Hydrochlorothiazide?

Correct answer: C

Rationale: Nephritis is not commonly treated with Hydrochlorothiazide. Hydrochlorothiazide is primarily used for managing hypertension (HTN) and congestive heart failure (CHF) by reducing blood pressure and fluid retention. It is not a standard treatment for nephritis, which involves inflammation of the kidneys. Hypercalciuria, characterized by excessive calcium excretion in the urine, is not typically treated with Hydrochlorothiazide either.

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

Correct answer: B

Rationale: When educating a client about Digoxin, it is crucial to instruct them to monitor their pulse before taking the medication. Digoxin can lead to bradycardia, so monitoring the pulse is essential to ensure it is not below 60 beats per minute before taking each dose. If the pulse is low, the client should hold the dose and seek guidance from their healthcare provider. Choices A, C, and D are incorrect. Taking Digoxin with food may affect its absorption, Digoxin is not known to increase appetite, and feeling nauseated does not necessarily indicate the need to discontinue the medication.

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