Final answer:
The nurse should report decreased breath sounds in a pregnant woman with eclampsia receiving IV magnesium sulfate immediately.
Explanation:
The symptom that the nurse should report immediately in a pregnant woman with eclampsia receiving IV magnesium sulfate is decreased breath sounds in both lung bases. This is a crucial sign that could indicate magnesium toxicity, as one of the serious side effects of IV magnesium sulfate is respiratory depression. If left untreated, this can progress to respiratory arrest, making it essential to address promptly.
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