which of the following is considered a class ia sodium channel blocker
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Nursing Elites

ATI RN

ATI Pharmacology Proctored

1. Which of the following is considered a class IA Sodium Channel blocker?

Correct answer: D

Rationale: Procainamide is a class IA antiarrhythmic drug that acts as a sodium channel blocker by blocking fast sodium channels. Mexiletine is a class IB antiarrhythmic drug, not class IA. Amiodarone is a class III antiarrhythmic, and Quinidine is a class IA antiarrhythmic but not a sodium channel blocker.

2. A client in a substance abuse clinic is being assessed by a nurse after discontinuing disulfiram due to severe nausea and vomiting. What is the likely cause of the client's distress?

Correct answer: C

Rationale: Disulfiram, when combined with alcohol, leads to a severe reaction causing nausea and vomiting. Since the client experienced these symptoms after starting disulfiram, it is likely that they consumed alcohol while taking the medication. Choice A is incorrect because the symptoms are more indicative of the interaction with alcohol rather than an allergic response. Choice B is incorrect as severe nausea and vomiting are not common side effects of disulfiram alone. Choice D is incorrect as there is no indication of an overdose based on the symptoms described.

3. A client has a new prescription for Verapamil to treat angina. The nurse should instruct the client to monitor for which of the following adverse effects?

Correct answer: C

Rationale: Verapamil, a calcium channel blocker, can cause peripheral edema due to vasodilation. Clients should monitor for this adverse effect characterized by swelling in the extremities. Muscle pain (choice A) is not a common adverse effect of Verapamil. Dry cough (choice B) is more commonly associated with ACE inhibitors. Increased urination (choice D) is not a typical adverse effect of Verapamil. Therefore, the correct answer is monitoring for peripheral edema.

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

Correct answer: A

Rationale: The correct instruction for a client with a new prescription for nitroglycerin sublingual tablets is to take one tablet at the first sign of chest pain. If the pain is not relieved after 5 minutes, the client should call 911 and take a second tablet. Taking more than the recommended dose can lead to serious side effects, and swallowing the tablet would not provide the rapid effect needed in cases of chest pain. Choice A is correct because it aligns with the standard protocol for nitroglycerin use in treating angina. Choice B is incorrect as the second tablet should be taken after 5 minutes, not 10 minutes. Choice C is incorrect as taking up to five tablets in 15 minutes is excessive and can result in serious complications. Choice D is incorrect as nitroglycerin sublingual tablets should be placed under the tongue for rapid absorption, not swallowed.

5. A client is starting a new prescription for furosemide. Which of the following instructions should the nurse include?

Correct answer: B

Rationale: When a client is prescribed furosemide, it is important to monitor for fluid loss. Weighing oneself daily helps track changes in weight due to fluid loss, which can indicate the effectiveness of the medication. This monitoring assists in managing fluid balance and adjusting the dosage if necessary to achieve the desired therapeutic effect. Choice A is incorrect because furosemide is usually recommended to be taken on an empty stomach. Choice C is incorrect because potassium supplements should only be taken if prescribed by a healthcare provider due to the risk of hyperkalemia with furosemide. Choice D is incorrect because decreasing sodium intake is generally a good dietary practice but not a specific instruction related to furosemide therapy.

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