Question: A preschooler has vomiting, diarrhea, and a potassium level of 3 mEq/L (3 mmol/L). Which prescribed order will the nurse implement first? Want Online Help? IV infusion of 500 ml of dextrose 5% in water and half-normal saline solution with 20 mEq (20 mmol/L) of potassium chloride at 100 ml/hr loperamide 15 ml by mouth promethazine topical gel 12.5 mg nasogastric tube to low intermittent suction