ATI LPN
LPN Pharmacology Practice Test
1. A healthcare professional is reviewing laboratory results for a client with rheumatoid arthritis prescribed methotrexate. Which of the following laboratory results should the healthcare professional report to the provider?
- A. WBC count 1,200/mm³
- B. Hemoglobin 14 g/dL
- C. Platelets 150,000/mm³
- D. Blood glucose 110 mg/dL
Correct answer: A
Rationale: A WBC count of 1,200/mm³ indicates leukopenia, a serious side effect of methotrexate that can lead to increased risk of infections. It is crucial to report this finding promptly to the provider for further evaluation and possible adjustments in the treatment plan. Choices B, C, and D are within normal ranges and do not represent significant concerns related to methotrexate therapy in this context.
2. A client has been taking levothyroxine for 6 months. Which of the following findings indicates that the medication is effective?
- A. Weight gain
- B. Increased heart rate
- C. Decreased TSH levels
- D. Elevated blood pressure
Correct answer: C
Rationale: In a client taking levothyroxine for thyroid hormone replacement, decreased TSH levels indicate that the medication is effective. TSH levels decrease as the thyroid hormone levels are adequately replaced by levothyroxine, signaling a positive response to treatment. Choices A, B, and D are incorrect because weight gain, increased heart rate, and elevated blood pressure are not expected findings indicating the effectiveness of levothyroxine therapy. Weight gain may suggest inadequate dosing, while increased heart rate and elevated blood pressure could indicate over-replacement or side effects of the medication.
3. A client is taking haloperidol. Which of the following findings should the nurse report to the provider?
- A. Weight gain
- B. Dry mouth
- C. Tremors
- D. Tardive dyskinesia
Correct answer: D
Rationale: The correct answer is D: Tardive dyskinesia. Tardive dyskinesia is a serious side effect associated with the long-term use of haloperidol. It is characterized by involuntary movements of the face, tongue, and extremities. Early detection is crucial as tardive dyskinesia may be irreversible and should be reported promptly to the healthcare provider for further evaluation and management. Choices A, B, and C are incorrect because weight gain, dry mouth, and tremors are common side effects of haloperidol but are not as concerning as tardive dyskinesia. While they should still be monitored and managed, tardive dyskinesia requires immediate attention due to its potentially irreversible nature.
4. A healthcare professional is assessing a client who has been taking isoniazid to treat tuberculosis. The healthcare professional should monitor the client for which of the following findings as an adverse effect of the medication?
- A. Diarrhea
- B. Blurred vision
- C. Hearing loss
- D. Jaundice
Correct answer: D
Rationale: Correct. Jaundice is a serious adverse effect of isoniazid due to liver damage. It is essential to monitor for signs of liver toxicity, such as jaundice, while the client is on this medication. Diarrhea is a common side effect of isoniazid, but it is not as serious as liver damage. Blurred vision and hearing loss are not typically associated with isoniazid use.
5. The client with heart failure is prescribed furosemide (Lasix). Which electrolyte imbalance is the nurse most likely to monitor for?
- A. Hyperkalemia
- B. Hypernatremia
- C. Hypokalemia
- D. Hyponatremia
Correct answer: C
Rationale: The correct answer is C: Hypokalemia. Furosemide, a loop diuretic, commonly causes potassium loss, leading to hypokalemia. The nurse should closely monitor for decreased potassium levels in a client receiving furosemide to prevent complications such as cardiac arrhythmias or muscle weakness. Hyperkalemia (Choice A) is not typically associated with furosemide use. Hypernatremia (Choice B) refers to high sodium levels and is not the primary concern with furosemide. Hyponatremia (Choice D) is low sodium levels, which can occur but is less common than hypokalemia in clients taking furosemide.
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