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A patient with chronic kidney disease (CKD) is prescribed erythropoietin. What is the primary action of this medication?
- A. Stimulate white blood cell production
- B. Increase platelet count
- C. Promote red blood cell production
- D. Enhance clotting factor production
Correct Answer: C
Rationale: The correct answer is C: Promote red blood cell production. Erythropoietin is a hormone that stimulates the production of red blood cells in the bone marrow. This is crucial for patients with CKD who often develop anemia due to decreased erythropoietin production.
A: Stimulating white blood cell production is the function of other medications, such as colony-stimulating factors, not erythropoietin.
B: Erythropoietin does not have an effect on platelet count.
D: Enhancing clotting factor production is not the primary action of erythropoietin.
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A client with heart failure is prescribed digoxin (Lanoxin). Which instruction should the nurse include in the client's teaching plan?
- A. Take your pulse before each dose and hold the medication if your pulse is below 60 beats per minute.
- B. Increase your intake of foods high in potassium.
- C. Take the medication with a high-fiber meal to enhance absorption.
- D. Skip a dose if you feel dizzy or lightheaded.
Correct Answer: A
Rationale: Correct Answer: A
Rationale:
1. Digoxin is a medication that can cause bradycardia as a side effect.
2. Instructing the client to take their pulse before each dose is crucial to monitor for bradycardia.
3. Holding the medication if the pulse is below 60 beats per minute helps prevent potential adverse effects.
4. This instruction ensures the client's safety and adherence to the prescribed regimen.
Summary:
- Choice B is incorrect because increasing potassium intake can lead to hyperkalemia when taking digoxin.
- Choice C is incorrect as taking digoxin with a high-fiber meal may affect absorption negatively.
- Choice D is incorrect because skipping a dose based on dizziness or lightheadedness may lead to suboptimal treatment outcomes.
A patient with chronic heart failure is prescribed furosemide. What is the primary action of this medication?
- A. Increase cardiac output
- B. Reduce fluid retention
- C. Decrease heart rate
- D. Lower blood pressure
Correct Answer: B
Rationale: The correct answer is B: Reduce fluid retention. Furosemide is a loop diuretic that works by increasing urine production, leading to the removal of excess fluid and sodium from the body. This helps reduce fluid volume overload in conditions like heart failure. Choice A is incorrect because while reducing fluid retention may indirectly improve cardiac output by reducing preload, furosemide itself does not directly increase cardiac output. Choice C is incorrect as furosemide does not have a direct effect on heart rate. Choice D is incorrect because while furosemide may lower blood pressure as a result of reducing fluid volume, its primary action is to reduce fluid retention, not specifically lower blood pressure.
What instruction should the nurse give regarding the administration of alendronate to a patient with osteoporosis?
- A. Take the medication with milk.
- B. Lie down for 30 minutes after taking the medication.
- C. Take the medication with a full glass of water.
- D. Take the medication before bedtime.
Correct Answer: C
Rationale: The correct answer is C: Take the medication with a full glass of water. Alendronate should be taken with a full glass of water on an empty stomach in the morning to enhance absorption. Option A is incorrect because taking alendronate with milk decreases its absorption. Option B is incorrect as lying down after taking alendronate can lead to esophageal irritation. Option D is incorrect because taking the medication before bedtime can cause esophageal irritation as well due to the risk of reflux when lying down.
What is the primary action of digoxin when prescribed to a patient with heart failure?
- A. Increase heart rate
- B. Decrease cardiac output
- C. Strengthen cardiac contractions
- D. Lower blood pressure
Correct Answer: C
Rationale: The primary action of digoxin in heart failure is to strengthen cardiac contractions. Digoxin inhibits the sodium-potassium pump, leading to an increase in intracellular calcium levels, which enhances the force of myocardial contractions. This helps improve cardiac output and symptoms of heart failure.
Explanation:
A: Incorrect - Digoxin does not increase heart rate, it mainly affects the strength of contractions.
B: Incorrect - Digoxin does not decrease cardiac output; it actually helps improve it by enhancing contractility.
D: Incorrect - Digoxin may have a slight effect on lowering blood pressure, but its primary action in heart failure is to strengthen cardiac contractions, not lower blood pressure.
What is the primary action of amlodipine when prescribed to a patient with hypertension?
- A. Increase heart rate
- B. Reduce blood pressure
- C. Lower cholesterol levels
- D. Decrease blood sugar levels
Correct Answer: B
Rationale: The primary action of amlodipine is to reduce blood pressure by relaxing and dilating blood vessels, leading to improved blood flow and lower blood pressure. This is achieved by blocking calcium channels in the blood vessels. Increasing heart rate (A), lowering cholesterol levels (C), and decreasing blood sugar levels (D) are not the primary actions of amlodipine and are not directly related to its mechanism of action in treating hypertension.