Hypokalemia is also relatively common in clinical settings. If the blood potassium level falls below 3.5 mmol, it indicates that the patient has hypokalemia. Clinically, this can affect related systems. For instance, patients may experience general weakness, nausea, vomiting, loss of appetite, and even disorientation. If the patient remains hypokalemic for an extended period, it can lead to arrhythmias, such as premature atrial and ventricular contractions. Once hypokalemia occurs, it must be actively managed by correcting the low potassium levels. Clinically, this can be done by administering potassium chloride sustained-release tablets via nasogastric feeding, as well as consuming potassium-rich vegetables and fruits.