Potassium Chloride Solution has the effect of treating and preventing hypokalemia and digitalis poisoning caused by various reasons. Potassium chloride solution is a commonly used electrolyte balance regulator in clinical practice and is widely used in various clinical departments. It is useful for the treatment and prevention of hypokalemia caused by insufficient food intake, vomiting, severe diarrhea, application of potassium-excreting diuretics, long-term application of glucocorticoid-stimulating hormone and adrenocorticotropic hormone, and potassium-losing nephropathy. Potassium chloride solutions may cause adverse reactions such as phlebitis, venous spasm, hyperkalemia, atrial or intraventricular conduction block, and sinus arrest. Potassium chloride solution should be contraindicated in patients with anuria, hyperkalemia, and significant atrioventricular block. It is recommended that it be used under the supervision of a physician to avoid self-administration of the drug to avoid adverse effects.