Potassium chloride is a commonly used clinical electrolyte supplement, mainly used for the treatment of hypokalemia and other diseases, but the use of this drug is prohibited for acute renal insufficiency and other conditions. 1. Indications (1) Hypokalemia caused by eating disorder or insufficiency, prolonged or severe vomiting and diarrhea, potassium-excreting drugs, long-term use of glucocorticoid and other reasons. (2) Hypokalemic familial periodic paralysis. (3) Cardiac manifestations in digitalis intoxication. (2) Prevention of hyperkalemia in cases of severe or chronic diarrhea. 2. Contraindications: Hyperkalemia, acute or chronic renal insufficiency is prohibited. 3.Precautions (1) Metabolic acidosis, reduced adrenocortical function, dehydration and other conditions, need to be used with caution under strict supervision. (2) Pay attention to the infusion rate when using. Potassium chloride needs to be used under the guidance of clinicians and unauthorized use is prohibited.