what is the therapeutic action of phenytoin
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Nursing Elites

ATI RN

ATI Pharmacology Proctored Exam 2024

1. What is the therapeutic action of Phenytoin?

Correct answer: B

Rationale: Phenytoin is primarily used as an anticonvulsant to prevent and control seizures. It works by stabilizing electrical activity in the brain, making it effective in managing conditions like epilepsy. Antidiabetic medications are used to regulate blood sugar levels, mood stabilizers help manage mood disorders, and antianxiety agents are used to reduce anxiety symptoms, none of which are the primary therapeutic action of Phenytoin.

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

Correct answer: B

Rationale: The correct answer is B: 'Avoid taking this medication with dairy products.' Ciprofloxacin should not be taken with dairy products because calcium can interfere with the absorption of the medication. Instructing the client to take it 1 hour before or 2 hours after consuming dairy products will ensure optimal effectiveness of the medication. Choice A is incorrect because Ciprofloxacin is usually recommended to be taken on an empty stomach or with a full glass of water. Choice C is incorrect as there is no specific requirement to take Ciprofloxacin at bedtime. Choice D is also incorrect as there is no need to increase intake of potassium-rich foods in relation to taking Ciprofloxacin.

3. A client with Angina Pectoris asks the nurse about the next step if they take one tablet, wait 5 minutes, but still have Anginal pain. Which response should the nurse provide?

Correct answer: B

Rationale: If anginal pain persists after taking the first tablet and waiting 5 minutes, the priority step is to call emergency services (911) and then take a second sublingual tablet. Persistent pain could indicate a myocardial infarction, and immediate medical attention is crucial. Taking two more tablets at the same time (Choice A) can lead to excessive vasodilation and hypotension. Taking a sustained-release nitroglycerin capsule (Choice C) is not appropriate for immediate relief during an acute episode. Waiting another 5 minutes and then taking a second tablet (Choice D) is not advisable in this emergency situation where prompt action is necessary.

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

Correct answer: A

Rationale: The correct instruction for a client prescribed allopurinol is to drink 2 liters of water daily. This helps reduce the risk of kidney stones, a potential side effect of allopurinol use. Adequate hydration is essential to prevent kidney stone formation and maintain kidney function while taking this medication.

5. A client is receiving warfarin therapy. Which of the following findings should the nurse identify as an adverse effect of warfarin?

Correct answer: B

Rationale: Epistaxis, or nosebleeds, can be an indication of excessive anticoagulation while on warfarin therapy. Warfarin is a blood thinner that helps prevent blood clots. Epistaxis can occur as a result of the blood-thinning effects of warfarin, leading to increased bleeding tendencies, including nosebleeds. Nausea, diarrhea, and dyspepsia are not typically associated with warfarin therapy; therefore, they are not the adverse effects the nurse should identify in a client receiving warfarin.

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