Answer: A

Colchicine is the drug of choice for the treatment of acute gout. There are two ways to use it: ① Take the first dose of 0.5 to 1 mg once, then 0.5 mg every 2 hours. Until pain is relieved or vomiting or diarrhea occurs, the maximum dose within 24 hours is 6 mg. After symptoms are relieved, 0.5 mg, 2 to 3 times/day, maintain for a few days and then discontinue. ②1mg, 3 times/day, the dose is halved after 1 week, and the course of treatment is 2 to 3 weeks. It is suitable for elderly patients. Most patients experience relief of acute symptoms within 24 to 48 hours. For preventing gout attacks, colchicine 0.5~1mg/d. The specific effects of colchicine also have characteristic diagnostic significance.