This relates to the pharmaceutical use of KOH, in forms of topical, oral drugs or intravenous drip, prepared for treating high blood uric acid, especially gout. The external application refers to footbath in soaking solution or embrocation on attack position. The action of the drugs is also to promote the excretion of uric acid. Compared with colchicine and other drugs, KOH has three notable features. First, it takes effect quickly. No matter being applied by footbath, oral or embrocation, it can relieve symptoms within ten minutes, and the pain during gout attack will be significantly reduced. Second, it takes curative effect quickly. After application of the drugs for 2-3 consecutive days, gout symptoms will completely disappear. Third, it has no side effects. In one respect, with a low concentration, the KOH will not corrode the skin. In a further respect, potassium ion itself is diuretic and it has no harm to kidney.