Aim To establish a UV spectrophotometry method for the determination of gliclazide sustained-release tablet.Methods Added ethanol to the powdered tablets,2 hours later ultrasounded it,filtered and diluted some of the filtrate to required concentration.Detector was set at 226 nm.Results The linearity range was 4.884~19.536 mg·L-1(r=0.999 9).The average recovery was 101.06% and RSD is 0.61%.The reproducibility(RSD=0.64%)is good.Conclusion The method is simple,rapid,accurate and selective,so this method is sui...