In conclusion, this head-to-head comparison of dapagliflozin versus glipizide added to metformin in type 2 diabetic patients inadequately controlled with metformin monotherapy demonstrated similar glycemic efficacy at 52 weeks but markedly divergent effects on weight and hypoglycemia. Whereas glipizide treatment led to weight gain and more hypoglycemicepisodes,dapagliflozinproduced significant weight loss and significantly fewer hypoglycemic episodes. Dapagliflozin treatment was generally safe and well tolerated, but events suggestive of genital and lower UTIs were observed more frequently in this study. Dapagliflozin is a potential valuable alternative to sulfonylureas as add-on therapy when metformin monotherapy fails to maintain adequate glycemic control.