Potassium citrate granules is a kind of potassium supplements, mainly to prevent the occurrence of hypokalemia in patients, because potassium is the main electrolyte for the metabolism of human cells, and also the electrolyte necessary for the contraction of muscle and heart muscle, potassium is very important to the human body. For example, many patients with heart failure usually take oral potassium-excreting diuretics, and such patients may need usual oral potassium supplementation therapy to prevent hypokalemia. Patients should pay attention to gastrointestinal reactions when applying drugs, some patients may have nausea and vomiting, gastrointestinal dysfunction after long-term oral intake, while some patients may have hyperkalemia after long-term oral intake without regular monitoring of potassium, most of these patients manifested as slow heart rate, fatigue, numbness of lips and lips, etc., and they should go to the hospital in time to monitor their blood pressure indexes.