Home » Ortho Related » Medications » MAGNESIUM CITRATE MAGNESIUM CITRATE - Discussion: - for vigorous bowel prep; constipation; is a saline cathartic; - Adult: 120-240ml PO prn; : 4 ml/kg/dose, upto max 200 ml PO; - Precautions: - do not use in renal insufficiency, intestinal obstruction