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 with active tuberculosis asks why he must take four different medications. Which of the following responses should the nurse make?

Correct answer: B

Rationale: The correct answer is B. When treating tuberculosis, using a combination of medications is crucial to reduce the risk of bacteria developing resistance to any single drug. This approach helps prevent treatment failure and ensures successful treatment outcomes. Choice A is incorrect because the primary purpose of using multiple medications is not related to allergic reactions. Choice C is incorrect as the risk reduction is mainly focused on bacterial resistance rather than adverse reactions. Choice D is not relevant as the purpose of taking multiple medications is not to affect the tuberculin skin test results.

3. What is a severe adverse effect of iron supplementation?

Correct answer: A

Rationale: A severe adverse effect of iron supplementation is seizures. Iron toxicity can lead to symptoms such as abdominal pain, vomiting, bloody diarrhea, lethargy, and in severe cases, seizures. It is important for individuals taking iron supplements to follow recommended dosages to prevent adverse effects.

4. A client is receiving treatment with capecitabine. Which of the following findings should the nurse monitor?

Correct answer: C

Rationale: Capecitabine is known to cause neutropenia as a common adverse effect due to bone marrow suppression. Neutropenia increases the risk of infections and requires close monitoring to prevent complications. Hyperglycemia (Choice A) is not typically associated with capecitabine. Hypocalcemia (Choice B) and Bradycardia (Choice D) are not commonly linked to capecitabine use, making them incorrect choices.

5. A nurse is reviewing the health history of a client who has a prescription for Propranolol. Which of the following findings should the nurse report to the provider?

Correct answer: C

Rationale: Propranolol is a nonselective beta-blocker that can cause bronchoconstriction, making it contraindicated for clients with a history of bronchial asthma.

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