When assessing a pregnant client with eclampsia who is receiving IV magnesium sulphate, which finding should the nurse report to the health care provider immediately?

A. The client has been sleeping most of the day: Magnesium sulfate has a central nervous system depressant effect, so drowsiness and increased sleepiness are expected therapeutic effects. It reduces neuromuscular excitability and helps prevent seizures in eclampsia. Mild sedation alone is not an immediate sign of toxicity. B. The client's respiratory rate is 6: A respiratory rate of 6 breaths/min indicates severe respiratory depression, which is a critical sign of magnesium toxicity. Magnesium inhibits neuromuscular transmission and can suppress the respiratory center in the brainstem. Respiratory depression can rapidly progress to respiratory arrest, making this a life-threatening emergency. C. The patellar and triceps reflexes are decreased: Diminished deep tendon reflexes are an early sign of magnesium sulfate effect and can precede toxicity. However, slightly decreased reflexes may be expected at therapeutic levels. Complete absence of reflexes would be more concerning, but decreased reflexes alone are not as immediately life-threatening. D. The client reports feeling "sick to my stomach": Nausea is a common side effect of magnesium sulfate and may occur due to its systemic effects on smooth muscle and the gastrointestinal tract. While it should be monitored and managed for comfort, it is not an indicator of severe toxicity requiring urgent intervention.