Hyperkalemia can be managed in a variety of ways including calcium injections, high concentrations of glucose as well as intravenous insulin, potassium-excreting diuretics, dialysis treatment, and reduction of potassium intake. Hyperkalemia is generally defined as a blood potassium level higher than 5.5 mmol/L. Increased blood potassium is commonly associated with excess potassium in the body or metastatic hyperkalemia. Hyperkalemia develops rapidly and is prone to cardiac arrest or severe cardiac arrhythmia. Common treatments are as follows. 1. Calcium salt injection: When severe cardiac arrhythmia is caused by hyperkalemia, calcium salt, such as calcium gluconate, should be injected immediately to normalize the heart rhythm. 2. High concentration of glucose as well as intravenous drip of insulin: potassium can be temporarily transferred into the cells to lower the blood potassium. 3. Diuretics for potassium excretion: common diuretics such as furosemide and hydrochlorothiazide can rapidly expel potassium ions from the body. 4. Dialysis treatment: Hemodialysis is more effective when the patient has chronic renal failure or uremia and has symptoms of oliguria or even anuria. 5. Reduce potassium intake: Stop eating high potassium vegetables and fruits or drugs containing potassium. Eat high-calorie foods to ensure adequate calorie supply. The use of the above medications must follow the doctor’s instructions, and not blindly use the medication by yourself, so as to avoid causing adverse consequences.