Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional
Official Title: Use of Metformin to Treat Patients With Congenital Nephrogenic Diabetes Insipidus (NDI)
Brief Summary: The purpose of this study is to determine whether metformin can increase urine concentration (osmolality) and decrease the amount of urine in patients with congenital nephrogenic diabetes insipidus (NDI).