The understanding of the molecular mechanisms of neonatal diabetes has deeply changed the therapy of patients carrying mutations in the K-ATP channel. Indeed, those patients are not treated anymore by insulin injections but by glibenclamide an oral anti-diabetic drug widely used in type 2 diabetes. Anyway, its galenic form (pills of 5 mg) is not suitable for children and difficult to administrate to infants or young children. The purpose of this study is to determine if a new galenic form of this durg is more suitable and as efficient as pills in children with neonatal diabetes.