Objective To observe the curative effect of the combined use of pemirolast potassium and cetirizine on chronic urticaria.Methods 90 cases of chronic urticaria were randomly divided into the treatment and the contrast groups.The 45 cases in the treatment group were treated with the combined use of pemirolast potassium and cetirizine,while the 45 cases in the contast group were treated only with cetirizine.Results The curative rates in the treatment group and the contrast group were 88.9%and 71.1%respectively...