Potassium chloride Injection is a medicine used in the treatment of potassium deficiency in the body and This supplement can relieve muscle weakness, irregular heartbeat, nausea, and vomiting and It is an essential nutrient of the body which helps in the maintenance of good health. This medicine is usually well-tolerated, however, it may cause mild injection site reactions (like pain, swelling, or redness), nausea, muscle weakness, and tingling sensation. Consult your doctor if any of the side effects persist.