what is the therapeutic use of phenytoin
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Nursing Elites

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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 has a new prescription for radioactive iodine to treat Hyperthyroidism. Which of the following instructions should the nurse include?

Correct answer: B

Rationale: When a client undergoes radioactive iodine treatment for hyperthyroidism, they can emit radiation for a short time. To prevent radiation exposure to others, especially pregnant women, infants, and small children, clients should avoid close contact for about 1 week following therapy. This precaution is essential to protect vulnerable individuals from potential harm. Choice A is incorrect because a metallic taste in the mouth is not a common side effect of radioactive iodine treatment. Choice C is incorrect because administering iodine solution using a straw is not a standard practice in this treatment. Choice D is incorrect because taking thyroid replacement medication for 3 weeks after treatment is not a typical instruction associated with radioactive iodine therapy for hyperthyroidism.

3. A client is starting therapy with Metformin. Which of the following instructions should the nurse include?

Correct answer: A

Rationale: Metformin should be taken with meals to reduce gastrointestinal side effects and ensure better absorption. Instructing the client to take the medication with the first bite of food helps in achieving optimal effectiveness and minimizes the risk of side effects like nausea or upset stomach. Choice B is incorrect because taking Metformin on an empty stomach can lead to increased gastrointestinal side effects. Choice C is incorrect as there is no specific timing requirement for taking Metformin before bedtime. Choice D is incorrect as Metformin is usually taken daily, not every other day.

4. What information should you provide to your patient if they are taking sennosides? Select All That Apply.

Correct answer: A

Rationale: When educating a patient taking sennosides, it is important to emphasize that these laxatives should be used for short-term therapy only. The medication does not address hypothyroidism, so this information is not relevant. Patients should be informed that the color of their urine may change to various colors like pink, red, violet, yellow, or brown, which is a common side effect of sennosides. It is advisable to incorporate other forms of bowel regulation alongside sennosides for optimal bowel health. Choice A is correct as it provides essential guidance on the duration of sennosides use. Choice B is incorrect because sennosides are not used to cure hypothyroidism. Choice C is correct as it highlights a common side effect of sennosides. Choice D is incorrect because it does not specifically relate to sennosides but rather suggests using other forms of bowel regulation in general.

5. When caring for a client receiving treatment with irinotecan, which of the following findings should the nurse monitor?

Correct answer: A

Rationale: The correct answer is diarrhea. Irinotecan commonly causes diarrhea as an adverse effect due to its impact on the gastrointestinal tract. Monitoring for diarrhea is essential to prevent dehydration and manage this side effect effectively. Choices B, C, and D are incorrect as hypertension, ototoxicity, and neutropenia are not commonly associated with irinotecan therapy.

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