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. Reteplase (Retavase) has been ordered for a client diagnosed with an MI. The nurse understands that this drug needs to be administered within which time frame following the onset of symptoms?

Correct answer: B

Rationale: Reteplase (Retavase) is a thrombolytic medication used in the treatment of myocardial infarction (MI). It is crucial to administer this drug within 30 minutes to 12 hours following the onset of symptoms to achieve optimal therapeutic effects and improve patient outcomes. Administering Reteplase within this time frame helps in restoring blood flow to the affected areas of the heart by dissolving blood clots, reducing myocardial damage, and potentially preventing further complications associated with MI.

3. A client has a new prescription for Nitroglycerin sublingual tablets. Which of the following instructions should the nurse include?

Correct answer: B

Rationale: The correct administration of Nitroglycerin sublingual tablets involves taking one tablet at the onset of chest pain and repeating every 5 minutes for up to three doses. This protocol helps in managing angina episodes effectively. Choice A suggests taking a tablet every 15 minutes until pain relief, which may delay appropriate intervention. Choice C, taking a tablet at bedtime, is not suitable for immediate relief during angina attacks. Choice D, taking a tablet on an empty stomach, is unrelated to the correct administration of Nitroglycerin sublingual tablets.

4. A client has a new prescription for combination oral NRTIs for the treatment of HIV. Which of the following statements should the nurse include in discharge teaching?

Correct answer: A

Rationale: The correct answer is A. NRTI antiretroviral medications inhibit the enzyme reverse transcriptase, which is essential for HIV replication. By blocking this enzyme, the medications prevent the virus from replicating and spreading. This mechanism of action helps to control the progression of HIV infection in the body. Choices B, C, and D are incorrect because NRTIs do not work by preventing protein synthesis, weakening the cell wall of the virus, or blocking HIV entry into cells. These mechanisms are associated with different classes of antiretroviral medications used in HIV treatment.

5. A client with early Parkinson's disease has been prescribed pramipexole. What adverse effect should the nurse instruct the client to monitor for?

Correct answer: A

Rationale: The correct answer is A: Hallucinations. Pramipexole can lead to hallucinations within 9 months of the initial dose, which may necessitate discontinuation of the medication. Monitoring for hallucinations is crucial to ensure early detection and management to prevent any adverse outcomes. Choice B, increased salivation, is not a common adverse effect of pramipexole. Choice C, diarrhea, is not typically associated with pramipexole use. Choice D, discoloration of urine, is not a known adverse effect of pramipexole and is not typically a concern with this medication.

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