The etiology for a patient’s potassium derangement should be identified and treated before a final disposition is made. Patients with mild hypokalemia and without any ECG changes can be safely discharged home with follow-up potassium testing to be completed within 1 week. They should be instructed to increase their dietary potassium and to return to the ED for any concerning symptoms. However, patients with moderate or severe hypokalemia with or without QT prolongation require admission to a monitored bed for intravenous potassium replacement.
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