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 reports taking Aspirin four times daily for a sprained wrist. Which of the following prescribed medications taken by the client is contraindicated with aspirin?

Correct answer: C

Rationale: Aspirin inhibits platelet aggregation, which can increase the effect of anticoagulants like warfarin, leading to an elevated risk of bleeding. Therefore, the concurrent use of aspirin and warfarin is generally contraindicated due to this potential interaction. Digoxin is not contraindicated with aspirin in most cases. Metformin and nitroglycerin do not have significant interactions with aspirin, making them less likely to be contraindicated in this scenario.

3. A healthcare provider is caring for four clients who have Peptic Ulcer Disease. The healthcare provider should recognize Misoprostol is contraindicated for which of the following clients?

Correct answer: A

Rationale: Misoprostol is contraindicated in pregnancy due to its potential to induce labor. It is used to prevent ulcers in patients taking nonsteroidal anti-inflammatory drugs and is not indicated for osteoarthritis, kidney stones, or urinary tract infections. Therefore, the correct answer is A. Misoprostol should not be used in pregnant individuals as it can cause uterine contractions and potentially harm the fetus. Choices B, C, and D are incorrect as Misoprostol is not contraindicated for clients with osteoarthritis, kidney stones, or urinary tract infections.

4. A client is receiving moderate sedation with Diazepam IV and is oversedated. Which of the following medications should the nurse anticipate administering to this client?

Correct answer: C

Rationale: Flumazenil is a competitive benzodiazepine antagonist that can reverse the sedative effects of benzodiazepines like Diazepam. In cases of oversedation, administering Flumazenil can help counteract the excessive sedation and other effects of Diazepam, thereby promoting the client's recovery and preventing potential complications. Ketamine (Choice A) is a dissociative anesthetic and not used to reverse benzodiazepine sedation. Naltrexone (Choice B) is an opioid receptor antagonist, not indicated for benzodiazepine oversedation. Fluvoxamine (Choice D) is an antidepressant and not used to reverse the sedative effects of benzodiazepines.

5. In which patient could the drug Senna potentially be indicated?

Correct answer: B

Rationale: Senna is a stimulant laxative commonly used to treat constipation by stimulating bowel movements. It is typically indicated for patients who have not passed stool in several days, thereby helping to relieve constipation. Patients with eating disorders may require different treatments related to their condition. Patients with anal fissures or a history of hemorrhoids may need treatments targeted at those specific issues, which may not involve Senna.

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