Potassium citrate granules have rapid replenishment of ions in body fluids and are mainly used in: i. Treatment of hypokalemia caused by various reasons, such as insufficient feeding, vomiting, severe diarrhea, application of potassium-removing diuretics, hypokalemic familial periodic paralysis, long-term application of glucocorticoids and supplementation of hypertonic glucose; ii. Prevention of hypokalemia, when patients have potassium loss and when hypokalemia is more harmful to patients if it occurs, such as Patients taking digitalis drugs need prophylactic potassium supplementation, such as those with little food, severe or chronic diarrhea, long-term use of adrenocorticotropic hormones, potassium loss nephropathy, etc.; iii. This product can also be applied to frequent, multiple sources of premature beats or tachyarrhythmias caused by digitalis toxicity.