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 received IV Verapamil to treat supraventricular tachycardia (SVT). The client's pulse rate is now 98/min, and blood pressure is 74/44 mm Hg. The nurse should anticipate a prescription for which of the following IV medications?

Correct answer: A

Rationale: In this situation, where the client's blood pressure is significantly lowered due to Verapamil administration, the nurse should anticipate a prescription for Calcium gluconate. Calcium gluconate is used to reverse severe hypotension caused by Verapamil. It should be given slowly intravenously as it counteracts the vasodilation caused by Verapamil, helping to normalize blood pressure levels. Sodium bicarbonate is not indicated for low blood pressure. Potassium chloride and magnesium sulfate are not the appropriate choices to address hypotension caused by Verapamil.

3. A client is taking atorvastatin for hyperlipidemia. Which of the following findings should the nurse report to the provider immediately?

Correct answer: C

Rationale: Muscle pain should be reported immediately as it can indicate rhabdomyolysis, a severe adverse effect of atorvastatin. Rhabdomyolysis is characterized by muscle pain, weakness, and can lead to serious complications such as kidney damage, making it crucial for the nurse to notify the provider promptly. Headache, nausea, and diarrhea are common side effects of atorvastatin and do not require immediate reporting unless severe or persistent.

4. Which drug undergoes extensive first-pass hepatic metabolism?

Correct answer: C

Rationale: Propranolol undergoes extensive first-pass hepatic metabolism in the liver. When administered orally, propranolol is extensively metabolized by the liver before reaching systemic circulation, leading to reduced bioavailability. This process is known as first-pass hepatic metabolism, which significantly affects the drug's effectiveness and necessitates higher oral doses compared to other routes of administration. Heparin (Choice A) is not metabolized by the liver but excreted unchanged by the kidneys. Insulin (Choice B) is a peptide hormone that is not subject to significant first-pass metabolism. Nitroglycerin (Choice D) is primarily metabolized in the blood and tissues, bypassing significant first-pass metabolism in the liver.

5. A client has a new prescription for Enalapril. Which of the following adverse effects should the nurse instruct the client to monitor?

Correct answer: A

Rationale: The correct answer is A: Dry cough. A common adverse effect of Enalapril, an ACE inhibitor, is a persistent dry cough. This occurs due to the accumulation of bradykinin. It is essential for the client to monitor for this side effect and report it to their healthcare provider promptly. Choices B, C, and D are incorrect because hyperglycemia, weight gain, and increased urination are not typically associated with Enalapril use.

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