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 with congestive heart failure taking digoxin refused breakfast and is complaining of nausea and weakness. Which action should the nurse take first?

Correct answer: A

Rationale: The nurse should check the client's vital signs first because nausea and weakness can be signs of digoxin toxicity. Vital signs can provide immediate information on the client's condition and help guide further interventions. Monitoring vital signs will allow the nurse to assess for bradycardia, a common sign of digoxin toxicity. Requesting a dietitian consult (choice B) may be necessary but addressing the immediate concern of toxicity is the priority. Suggesting rest before eating (choice C) may not address the underlying issue of digoxin toxicity. Requesting an antiemetic (choice D) can be considered later but is not the initial action needed in this situation.

3. A healthcare provider is caring for several clients who came to the clinic for a seasonal influenza immunization. The provider should identify that which of the following clients is a candidate to receive the vaccine via nasal spray rather than an injection?

Correct answer: B

Rationale: The correct answer is B. A 17-year-old can receive the influenza vaccine via nasal spray even if they have a hypersensitivity to penicillin, as this is not a contraindication for the influenza immunization. The nasal spray vaccine (LAIV) is a live attenuated vaccine that is suitable for healthy individuals aged 2-49 years. Pregnancy (choice C) is a contraindication for the nasal spray influenza vaccine. Children under 2 years of age (choice A) are also not candidates for the nasal spray. Taking a multivitamin supplement (choice D) is not a determining factor for the type of influenza vaccine a person should receive.

4. A client is starting therapy with paclitaxel. Which of the following adverse effects should the nurse instruct the client to monitor?

Correct answer: C

Rationale: Neutropenia is a common adverse effect of paclitaxel due to bone marrow suppression. Clients should be instructed to monitor for signs of infection and report any symptoms such as fever, chills, or sore throat immediately to their healthcare provider.

5. A healthcare provider is reviewing a client's health record and notes that the client experiences permanent extrapyramidal effects caused by a previous medication. The healthcare provider should recognize that the medication affected which of the following systems in the client?

Correct answer: C

Rationale: The correct answer is C: Central nervous. Extrapyramidal effects are movement disorders that can be caused by certain medications affecting the central nervous system, such as typical antipsychotic medications. These effects can lead to symptoms like tremors, muscle rigidity, and involuntary movements, which are all related to disruptions in the central nervous system. Choices A, B, and D are incorrect because extrapyramidal effects are specifically associated with the central nervous system and not the cardiovascular, immune, or gastrointestinal systems.

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