Get emergency medical help if you have signs of an allergic reaction to potassium chloride: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
severe throat irritation;
stomach bloating, severe vomiting, severe stomach pain;
high potassium level - nausea, weakness, tingly feeling, chest pain, irregular heartbeats, loss of movement; or
signs of stomach bleeding - bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds.
Common potassium chloride side effects may include:
nausea, vomiting, diarrhea;
gas, stomach pain; or
the appearance of a potassium chloride tablet in your stool.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Potassium chloride side effects (more detail)
