The specification of each potassium chloride extended-release tablet is usually 0.5g, and the adult medication is usually two tablets twice a day, each time to take two tablets, that is, 2g per day. Potassium chloride extended-release tablets are generally used for hypokalemia caused by various reasons, such as long-term fasting, severe vomiting, renal tubular diseases and other causes of blood potassium drop; in addition, for patients who take digitalis leading to poisoning, with polygenic premature beats and tachyarrhythmia, potassium chloride extended-release tablets can also be used for treatment. The usage of potassium chloride extended-release tablets is once in the morning and once in the evening, taking two tablets each time. If the condition is serious, it can be adjusted according to the severity of the condition, but the maximum dosage in a day generally should not exceed 6g, i.e. not more than 12 tablets. It should be noted that potassium chloride extended-release tablets may cause gastrointestinal discomfort such as nausea and vomiting, hyperkalemia and other side effects. Taking potassium chloride extended-release tablets should be under the guidance of a professional doctor, do not take medication without authorization, in order to avoid adverse consequences.