Transition from insulin to glyburide in a 4-month-old girl with neonatal diabetes mellitus caused by a mutation in KCNJ11.

Initial management of neonatal diabetes mellitus consists of insulin and adequate calories for growth. Once a genetic diagnosis is made, most patients with neonatal diabetes caused by mutations in the KCNJ11 gene can be successfully managed with a sulfonylurea agent without the need for insulin. We report on the transition from insulin to glyburide (glibenclamide) therapy in a 4-month-old girl with neonatal diabetes mellitus caused by a mutation in KCNJ11. Dosing of glyburide three times daily was critical for her successful transition.