Potassium and magnesium tablets are electrolyte supplementation agents used to correct electrolyte disorders i.e. low potassium and magnesium. In addition, after taking this medicine, potassium ions and magnesium ions are absorbed into the body, the intracellular concentration of potassium and magnesium is increased, and the normal excitability of cells of nerve tissue, cardiac muscle, smooth muscle, etc. and the stability of the internal environment are maintained. Therefore, potassium and magnesium tablets can be used to assist in the treatment of myocarditis, myocardial infarction, heart failure and other cardio-metabolic disorders. Gastrointestinal reactions such as abdominal discomfort, loss of appetite, nausea, vomiting and diarrhea may occur after taking this drug, but the gastrointestinal reactions will disappear after stopping the drug. Potassium and magnesium tablets should be taken to monitor blood potassium and magnesium concentrations, with hyperkalemia, hypermagnesemia, severe renal dysfunction, severe atrioventricular block and active peptic ulcer patients should be prohibited from using this drug.