Objective To study the efferts of influencing factors of Piractam permeating chitosan membrane.Methods Single-factor test used to determine the factors on the release of Piractam,using ultraviolet spectrophotometric to determinate the contents of Piractam permeating chitosan membrane.Results Chitosan membrane can control the release of the Piractam.The drug release rate was decreased significantly with a increase in thickness of chitosan membrane,a decrease in Static pressure difference and covering area.Co...