A nurse is caring for a client who has severe preeclampsia and is receiving magnesium sulfate intravenously. The nurse discontinues the magnesium sulfate after the client displays toxicity. Which of the following actions should the nurse take?

Choice A reason: Calcium gluconate IV reverses magnesium sulfate toxicity, which causes respiratory depression or arrhythmias due to excessive magnesium. Calcium restores neuromuscular and cardiac function by competing with magnesium, preventing life-threatening complications like respiratory arrest in preeclampsia management. Choice B reason: Positioning supine is inappropriate, as it does not address magnesium toxicity and may worsen respiration in preeclampsia. Semi-Fowler’s position optimizes breathing, while toxicity requires pharmacological reversal with calcium gluconate, not positional changes, to manage life-threatening symptoms effectively. Choice C reason: IV dextrose is irrelevant for magnesium toxicity, which affects neuromuscular function, not glucose levels. Dextrose treats hypoglycemia, not applicable here. Magnesium overdose requires calcium to counteract effects, making dextrose an ineffective intervention in preeclampsia-related toxicity management. Choice D reason: Methylergonovine, a uterotonic, is contraindicated in preeclampsia, as it increases blood pressure, risking hypertensive crisis. It treats postpartum hemorrhage, not magnesium toxicity, which requires calcium gluconate to reverse neuromuscular depression, ensuring safety in preeclampsia management.