Potassium chloride 10% is mainly used to replenish potassium, especially in patients applying diuretics, or in patients with reduced food intake, massive vomiting, diarrhea and other causes of hypokalemia, which often need to be replenished by potassium chloride 10%, it is available orally or intravenously, and when used intravenously, intravenous pushing is strictly prohibited. Low potassium can easily lead to various cardiac arrhythmias and even cardiac arrest, so it is important to pay attention to it. Of course, it is important not to overdo it, as high potassium can lead to arrhythmias and cardiac arrest. Therefore, when supplementing potassium, it is important to confirm through laboratory tests that the blood potassium is low before supplementing, and not to supplement casually.