ATI RN
ATI Pharmacology Proctored Exam 2023
1. While caring for a client receiving Heparin therapy, which of the following laboratory tests should the nurse monitor to evaluate the effectiveness of the therapy?
- A. PT
- B. INR
- C. aPTT
- D. Platelet count
Correct answer: C
Rationale: The nurse should monitor the aPTT (activated partial thromboplastin time) when caring for a client receiving Heparin therapy. The aPTT reflects the intrinsic pathway of the clotting cascade and is used to monitor the effectiveness of heparin, which primarily affects this pathway by potentiating antithrombin III. Monitoring the aPTT helps ensure that the client's blood is within the therapeutic range to prevent thrombus formation. Choices A, B, and D are incorrect. PT (Prothrombin Time) and INR (International Normalized Ratio) are used to monitor Warfarin therapy, not Heparin. Platelet count is important in assessing for thrombocytopenia but is not a specific indicator of Heparin therapy effectiveness.
2. A nurse is evaluating teaching for a client who has Rheumatoid Arthritis and a new prescription for Methotrexate. Which of the following statements by the client indicates understanding of the teaching?
- A. I will be sure to return to the clinic at least once a year to have my blood drawn while I'm taking methotrexate.
- B. I will take this medication on an empty stomach.
- C. I'll let the doctor know if I develop sores in my mouth while taking this medication.
- D. I should stop taking oral contraceptives while I'm taking methotrexate.
Correct answer: C
Rationale: Ulcerations in the mouth, tongue, or throat are often the first signs of methotrexate toxicity and should be reported to the provider immediately.
3. A client is prescribed Propylthiouracil (PTU) for the treatment of Graves' disease. Which adverse effect should the client be instructed to report?
- A. Sore throat.
- B. Drowsiness.
- C. Urinary retention.
- D. Heat intolerance.
Correct answer: A
Rationale: The correct answer is A: Sore throat. A sore throat and fever can indicate agranulocytosis, a serious adverse effect of PTU that can lead to a decreased white blood cell count. This condition requires immediate medical attention to prevent complications. Choice B, drowsiness, is not typically associated with PTU and is not a common adverse effect that needs to be reported. Choice C, urinary retention, is not a typical adverse effect of PTU; therefore, it is not the correct answer. Choice D, heat intolerance, is a symptom commonly seen in hyperthyroidism, which PTU is used to treat, so it is not an adverse effect that needs to be specifically reported.
4. A client is prescribed Spironolactone. Which of the following laboratory findings should the nurse monitor and report to the provider?
- A. Sodium level of 138 mEq/L
- B. Potassium level of 5.2 mEq/L
- C. Chloride level of 100 mEq/L
- D. Calcium level of 9.5 mg/dL
Correct answer: B
Rationale: Spironolactone is a potassium-sparing diuretic, causing potassium retention, potentially leading to elevated potassium levels. A potassium level of 5.2 mEq/L is above the normal range (3.5-5.0 mEq/L), indicating hyperkalemia, a serious condition. Elevated potassium levels can lead to life-threatening cardiac arrhythmias. Monitoring and reporting high potassium levels promptly to the healthcare provider are crucial to prevent potential complications. Sodium, chloride, and calcium levels are not directly influenced by Spironolactone, making choices A, C, and D incorrect.
5. A client has a new prescription for nitroglycerin sublingual tablets. Which of the following instructions should the nurse include?
- A. Take one tablet at the first sign of chest pain.
- B. If pain is not relieved, take another tablet in 10 minutes.
- C. You can take up to five tablets in 15 minutes.
- D. Swallow the tablet with water.
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 persists after 5 minutes, the client should call 911 and take a second tablet. Choice A is correct because taking one tablet at the onset of chest pain helps to relieve symptoms by dilating blood vessels and improving blood flow to the heart. Choices B and C are incorrect as they suggest taking multiple tablets without waiting for the initial dose to take effect, which can lead to hypotension and other adverse effects. Choice D is incorrect as nitroglycerin sublingual tablets should not be swallowed but instead placed under the tongue for rapid absorption.
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