A client in preterm labor has had an infusion of magnesium sulfate running for 8 hours. Current assessment findings are respirations of 14 breaths/minute, a urine output of 25 mL/hr, deep tendon reflexes of 1+, and a serum magnesium level of 8 mEq/L (4 mmol/L). Based on these assessment findings, which conclusion should the nurse reach? Reference Range: Magnesium [1.3 to 2.1 mEq/L (0.65 to 1.05 mmol/L)]