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  • Title: Comparison of efficacy, secondary failure rate, and complications of sulfonylureas.
    Author: Harrower AD.
    Journal: J Diabetes Complications; 1994; 8(4):201-3. PubMed ID: 7833494.
    Abstract:
    The data from three clinical trials are presented, comparing the efficacy of different sulfonylureas in the treatment of type II diabetes. In a multicenter study, gliclazide improved control in 49% of patients who had failed on other drugs. When five groups of type II diabetic patients were treated concurrently with five randomly allocated different sulfonylureas over 1 year, the percentage of patients achieving normal HbA1 levels was best with gliclazide (80%) and glibenclamide (74%), when compared with chlorpropamide (17%), glipizide (40%), and gliquidone (40%). Secondary failure rate over 5 years was assessed in 248 type II diabetic patients randomly allocated to three different sulfonylureas and found to be lowest with gliclazide (7%) compared with glibenclamide (17.9%): p < 0.1) and glipizide (25.6%: p < 0.005). The incidence of hypoglycemia was significantly higher with glibenclamide than with gliclazide (p < 0.05). The differences in efficacy and secondary failure rate between sulfonylureas may be related to the mechanism of insulin release from the beta-cell and the more physiological action of gliclazide could partly explain this. These trials suggest that gliclazide is a potent sulfonylurea with a low rate of secondary failure and a low incidence of side effects and may be a better choice in long-term sulfonylurea therapy.
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