Potassium chloride extended-release tablets are usually taken by adults 1~2 tablets at a time, 2~4 times a day, the specific dosage needs to be decided by the doctor according to the condition, and patients should follow the doctor’s instructions to use the drug. Potassium chloride extended-release tablets are electrolyte balance regulating drugs, mainly used for the treatment and prevention of hypokalemia, digitalis intoxication caused by frequent, multiple sources of premature beats or tachyarrhythmia. Potassium chloride extended-release tablets is 0.5g/tablet, adults once 0.5~1g, 2~4 times a day, the specific dosage can be adjusted by the doctor according to the needs of the disease. Generally, the maximum daily dose for adults is 6g, overdose may cause hyperkalemia, too little may affect the therapeutic effect of the drug, patients should follow the doctor’s instructions to use the drug, do not arbitrarily increase or decrease the dose. Potassium chloride extended-release tablets belong to oral tablets, those who have gastrointestinal reactions to oral tablets can switch to oral solution, diluted in cold boiled water or drinks for internal use. Potassium chloride extended-release tablets must be swallowed whole, not chewed or ground and taken after meals, and should be taken after meals to avoid gastrointestinal tract irritation on an empty stomach. In the process of medication, patients may experience nausea, vomiting, chest pain or even gastrointestinal ulcers or bleeding, and need to closely monitor the changes of indicators such as blood potassium, magnesium, sodium, renal function and urinary output, etc. In case of serious discomfort or test abnormality, patients should consult the doctor in time for adjustment of the medication, and discontinuation of the medication is also necessary. In addition, the use of this drug should be prohibited in patients with hyperkalemia, little urine output or urinary closure. Patients should take the drug strictly according to the doctor’s requirements to avoid serious consequences.