What are the side effects of KCl in D5W?

As with all injections, administering KCl in D5W (potassium chloride in 5% dextrose injection) may cause swelling or irritation at the site of the injection. Talk to a doctor immediately if the injection site develops an infection or if the patient receiving KCl in D5W develops a fever. Allergic reactions to KCl in D5W are possible. Seek emergency care if the person receiving KCl in D5W experiences difficulty breathing, hives, itchy rash or swelling in the face, mouth or throat. Since the solution contains dextrose, too much KCl in D5W may cause high blood sugar levels, particularly in people with diabetes. Common side effects to potassium-containing solutions like KCl D5W include: nausea, abdominal pain, vomiting and diarrhea. If too much KCl in D5W is administered, the result can be symptoms of an overdose of potassium, like muscle weakness, confusion or irregular or slow heart rate. Too much KCl in D5W can also cause dangerously high blood volume, which could cause cardiac problems or fluid buildup in the lungs. Overdoses should be promptly treated by a medical professional.