For potassium deficiency, the fastest way to replenish potassium is to identify the cause and take targeted treatment. Generally, it includes consumption of potassium-rich food, oral medication or intravenous potassium supplementation. If the hypokalemia is caused by primary disease, the primary disease should be actively treated. 1. Potassium-rich foods: such as lamb, pork, carp, eel and other meats, vegetables such as cabbage, spinach, seaweed, fungus and other fruits such as banana, tangerine, orange, mango, longan, etc.; applicable to patients with mild potassium deficiency caused by vomiting, diarrhea and other conditions. 2. Drug treatment: common drugs include potassium citrate tablets, potassium chloride tablets, etc. The drugs should be used under the guidance of doctors. 3. Intravenous drip treatment: If the potassium deficiency is serious, intravenous drip should be used to replenish potassium rapidly, and attention should be paid to the dynamic monitoring of urine volume and blood potassium level. When there are symptoms of potassium deficiency such as fatigue, drowsiness, panic, weakness, numbness of lips and mouth, etc., it is necessary to consult a doctor in time and follow the doctor’s instructions for treatment, and not to use drugs without authorization.