Potassium Chloride Extended-Release Tablets are mainly used for the treatment and prevention of hypokalemia, but also for frequent, multiple premature beats or tachyarrhythmias due to digitalis toxicity. Adverse reactions such as gastrointestinal irritation symptoms and hyperkalemia symptoms can occur with the administration of potassium chloride. 1. Gastrointestinal irritation: nausea, vomiting, pharyngeal discomfort, chest pain (esophageal irritation), abdominal pain, diarrhea, and even peptic ulcer and bleeding; 2. Hyperkalemia: Hyperkalemia can occur with excessive application, manifested as weakness, fatigue, numbness of hands, feet, mouth and lips, unexplained anxiety, fuzzy consciousness, dyspnea, heart rate slowing, arrhythmia, conduction block, and so on. The electrocardiogram may show high and sharp T-waves, and gradually prolonged P-R interval. In severe cases, P wave disappears, QRS wave becomes wide and sinusoidal. Potassium chloride extended-release tablets are contraindicated in patients with hyperkalemia, oliguria and urinary incontinence. When taking potassium chloride delayed-release tablets, it should also be noted that metabolic acidosis with oliguria, adrenocortical function is weakened, acute renal failure, etc. Use with caution. If you are taking Potassium Chloride Extended-Release Tablets, the dosage should be set by the doctor, do not overdose.