[Answered]: Four hours after the magnesium sulfate infusion…

Four hours after the magnesium sulfate infusion is initiated, the nurse obtains a specimen for a serum magnesium level. The laboratory calls to report a critical magnesium value of 6.2 mEq/L. What is the most appropriate intervention by the nurse? A. Notify the practitioner that a therapeutic level of magnesium has been achieved. B. Notify the practitioner of a critical level of magnesium. C. Stop the magnesium infusion because the patient has a toxic level of magnesium. D. Continue the magnesium infusion but reduce the rate by half.