what is the therapeutic use of phenytoin
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Nursing Elites

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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 prescribed Isosorbide Mononitrate for chronic stable Angina develops reflex tachycardia. Which of the following medications should the nurse expect to administer?

Correct answer: D

Rationale: Metoprolol, a beta-adrenergic blocker, is commonly used to treat hypertension and stable angina pectoris. It is often prescribed to decrease heart rate in clients who develop tachycardia, such as in the case of reflex tachycardia induced by Isosorbide Mononitrate, making it the appropriate choice in this scenario. Furosemide (Choice A) is a loop diuretic used for conditions like heart failure and edema, not for reflex tachycardia. Captopril (Choice B) is an ACE inhibitor primarily used for hypertension and heart failure, not for reflex tachycardia. Ranolazine (Choice C) is used for chronic angina but does not specifically address reflex tachycardia.

3. When starting therapy with trastuzumab, which finding should the nurse instruct the client to report?

Correct answer: A

Rationale: The correct answer is A: Dyspnea. Dyspnea can indicate pulmonary toxicity, a severe adverse effect of trastuzumab. It is crucial for the client to report any breathing difficulties promptly to ensure timely intervention and prevent further complications. Choices B, C, and D are incorrect because constipation, tinnitus, and dry mouth are not commonly associated with trastuzumab therapy and are not indicative of serious adverse effects that require immediate attention.

4. A healthcare professional is preparing to administer Pamidronate to a client who has bone pain related to cancer. Which of the following precautions should the healthcare professional take when administering pamidronate?

Correct answer: B

Rationale: Pamidronate is administered through intravenous (IV) infusion. As this medication can be irritating to veins, the healthcare professional should carefully assess the IV site for thrombophlebitis during administration to prevent potential complications. Choice A is incorrect as Pamidronate is not administered via intradermal patch. Choice C is incorrect as it does not relate to the administration of Pamidronate. Choice D is incorrect as Pamidronate is not administered intramuscularly.

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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