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. When starting therapy with raloxifene, a client should monitor for which of the following adverse effects?

Correct answer: B

Rationale: The correct answer is B: Hot flashes. When initiating therapy with raloxifene, clients should be advised to monitor for hot flashes as they are a common adverse effect associated with this medication. Hot flashes are a well-known side effect of raloxifene due to its action on estrogen receptors. Leg cramps (Choice A), urinary frequency (Choice C), and hair loss (Choice D) are not typically associated with raloxifene therapy. Therefore, monitoring for hot flashes is crucial to manage and address this common side effect appropriately.

3. A healthcare provider is providing discharge instructions to a client who is prescribed Warfarin. Which of the following dietary instructions should the provider include?

Correct answer: B

Rationale: The correct answer is to avoid foods high in vitamin K. Vitamin K can interfere with the effectiveness of Warfarin by counteracting its anticoagulant effects. Foods high in vitamin K, such as leafy green vegetables, should be limited in the diet of individuals taking Warfarin to maintain a consistent level of the medication's effectiveness. Choices A, C, and D are incorrect as increasing intake of leafy green vegetables (choice A) and dairy products (choice C) may increase the intake of vitamin K, which is not recommended, and avoiding foods high in iron (choice D) is not directly related to Warfarin therapy.

4. A client is starting therapy with Metformin. Which of the following instructions should be included by the healthcare provider?

Correct answer: A

Rationale: The correct answer is A: 'Take this medication with your first bite of food.' Metformin should be taken with meals to reduce gastrointestinal side effects and ensure better absorption. By taking the medication with the first bite of food, the client can help minimize potential stomach upset and improve the drug's effectiveness. Choice B is incorrect because taking Metformin on an empty stomach can increase the risk of gastrointestinal side effects. Choice C is incorrect as there is no specific recommendation to take Metformin before bedtime. Choice D is incorrect because Metformin is typically taken daily, not every other day, as prescribed by the healthcare provider.

5. To which pharmacologic classification does the drug propranolol belong?

Correct answer: A

Rationale: Propranolol belongs to the pharmacologic classification of Beta Blockers. Beta blockers work by blocking the action of adrenaline and other stress hormones on beta-adrenergic receptors. They are commonly used to manage conditions like high blood pressure, angina, and arrhythmias. Choice B, Cholinergics, is incorrect because cholinergics work by stimulating the parasympathetic nervous system, unlike beta blockers that block adrenergic receptors. Choice C, Immune globulins, is incorrect as it refers to antibodies used to boost the immune system, not the mechanism of action of propranolol. Choice D, Barbiturates, is incorrect as barbiturates are a different class of drugs that act as central nervous system depressants, primarily used as sedatives and anesthetics.

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