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 with Bipolar disorder has a new prescription for Carbamazepine. Which of the following instructions should the nurse include in the teaching? (Select all that apply.)

Correct answer: B

Rationale: The correct answer is B: "Eliminate grapefruit juice from your diet." Grapefruit juice affects carbamazepine metabolism and should be avoided. It can lead to increased levels of the medication, potentially causing toxicity. Monitoring carbamazepine blood levels and the complete blood count (CBC) is essential to ensure the medication's efficacy and safety. Although choice A is incorrect (This medication can safely be taken during pregnancy), carbamazepine is classified as a Pregnancy Category D drug, which means there is positive evidence of human fetal risk. Choice D (Notify your provider if you develop a rash) is also important because carbamazepine can cause serious adverse effects like Stevens-Johnson syndrome, which can be life-threatening. Regular monitoring and prompt reporting of any rash are crucial. Therefore, choices C and D are also relevant instructions for the client.

3. A client is withdrawing from alcohol and has a new prescription for Propranolol. Which of the following information should be included in the teaching?

Correct answer: C

Rationale: The correct answer is C: 'Decreases cravings.' Propranolol is commonly used as an adjunct medication during alcohol withdrawal to help reduce cravings for alcohol. It does not increase the risk for seizure activity, provide aversion therapy, or result in mild hypertension. By decreasing cravings, Propranolol can support the client in managing alcohol withdrawal symptoms and promoting abstinence. Therefore, it is important to educate the client on how Propranolol can help them cope with alcohol cravings effectively.

4. A client has a prescription for Levothyroxine. Which of the following instructions should the nurse include?

Correct answer: A

Rationale: Levothyroxine should be taken on an empty stomach to increase absorption and efficacy. Taking it with food or antacids can interfere with its absorption, leading to reduced effectiveness of the medication.

5. A client in an acute care facility is receiving IV Nitroprusside for hypertensive crisis. The nurse should monitor the client for which of the following adverse reactions to this medication?

Correct answer: C

Rationale: The correct answer is C: Delirium. When IV Nitroprusside is infused at high dosages, it can lead to thiocyanate toxicity, causing mental status changes such as delirium. It is crucial to monitor the thiocyanate levels to ensure they remain below 10 mg/dL during therapy to prevent adverse effects. Choices A, B, and D are incorrect because IV Nitroprusside is not commonly associated with intestinal ileus, neutropenia, or hyperthermia. Monitoring for delirium is crucial due to the risk of thiocyanate toxicity.

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