The physician has ordered amiodarone (Cordarone). Prior to starting this medication, the nurse would alert the physician to which laboratory result?
1. Sodium 140 mEq/L
2. Potassium 3.1 mEq/L
3. Potassium 5.1 mEq/L
4. International normalized ratio (INR) of 12 seconds
Correct Answer: 2
Rationale: Hypokalemia and hypomagnesemia should be corrected prior to initiating therapy with amiodarone (Cordarone). 5.1 mEq/L is a normal potassium level. 140 mEq/L is a normal sodium level. Twelve seconds is a normal international normalized ratio (INR) level.
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