ATI RN
ATI Pharmacology
1. A healthcare provider in a clinic is monitoring serum electrolytes for four older adult clients who take digoxin. Which of the following electrolyte values increases a client's risk for Digoxin toxicity?
- A. Calcium 9.2 mg/dL
- B. Calcium 10.3 mg/dL
- C. Potassium 3.4 mEq/L
- D. Potassium 4.8 mEq/L
Correct answer: C
Rationale: Potassium 3.4 mEq/L is below the expected reference range, which increases the risk for digoxin toxicity. Low potassium levels can lead to fatal dysrhythmias, particularly in older clients taking Digoxin. Hypokalemia potentiates the effects of Digoxin, making the heart more sensitive to its toxic effects. Monitoring and correcting electrolyte imbalances, especially low potassium levels, are crucial to prevent adverse effects of digoxin therapy. Calcium levels do not directly influence digoxin toxicity, so choices A and B are incorrect. High potassium levels, as in choice D, are less likely to increase the risk of digoxin toxicity compared to low potassium levels.
2. When administering Phenytoin, what should you monitor?
- A. Behavior
- B. Therapeutic blood levels
- C. For signs of Stevens-Johnson syndrome
- D. All of the above
Correct answer: D
Rationale: When administering Phenytoin, monitoring the patient's behavior is important to assess for any changes that may indicate adverse effects. Monitoring therapeutic blood levels helps ensure the medication is within the effective range and not causing toxicity. Additionally, being vigilant for signs of Stevens-Johnson syndrome, a severe skin reaction associated with Phenytoin use, is crucial for early detection and intervention. Therefore, monitoring behavior, therapeutic blood levels, and for signs of Stevens-Johnson syndrome are all essential when administering Phenytoin.
3. A client with heart failure is being instructed on laxative use. Which of the following laxatives should the client avoid?
- A. Sodium phosphate
- B. Psyllium
- C. Bisacodyl
- D. Polyethylene glycol
Correct answer: A
Rationale: The correct answer is A: Sodium phosphate. Clients with heart failure often follow a sodium-restricted diet. Sodium phosphate laxatives can lead to sodium absorption, causing fluid retention, which is contraindicated in heart failure. It is crucial to avoid sodium phosphate laxatives in these clients to prevent exacerbation of fluid overload and heart failure symptoms. Psyllium (choice B), Bisacodyl (choice C), and Polyethylene glycol (choice D) are not contraindicated in clients with heart failure and can be used safely for bowel management.
4. A client is being assessed by a healthcare provider while taking Digoxin to manage heart failure. Which of the following findings is a manifestation of digoxin toxicity?
- A. Bruising
- B. Report of metallic taste
- C. Muscle pain
- D. Report of anorexia
Correct answer: D
Rationale: The correct manifestation of digoxin toxicity is anorexia, not bruising, metallic taste, or muscle pain. Other symptoms of digoxin toxicity include blurred vision, stomach pain, and diarrhea. It is crucial for healthcare providers to promptly identify these signs to prevent severe complications.
5. When teaching a client with a new prescription for Sulfasalazine, which instruction should the nurse include?
- A. Expect orange discoloration of urine and skin.
- B. Increase your intake of high-sodium foods.
- C. Take the medication with a full glass of milk.
- D. Expect your stools to be black and tarry.
Correct answer: A
Rationale: The correct instruction to include when teaching a client with a new prescription for Sulfasalazine is to expect orange discoloration of urine and skin. Sulfasalazine can cause this harmless side effect, which does not necessitate discontinuation of the medication. It is crucial for the nurse to educate the client about this expected outcome to prevent unnecessary concern or discontinuation of the medication. Choices B, C, and D are incorrect. Increasing intake of high-sodium foods is not recommended with Sulfasalazine, as it can worsen certain side effects. Taking the medication with a full glass of milk is not necessary for Sulfasalazine administration. Expecting stools to be black and tarry is not an expected side effect of Sulfasalazine.
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