This is a very high level, and it needs to come down somewhat gradually so as not to experience feelings of low blood sugar. Taking charge of food and lifestyle is the path to stay on. Insulin may help to detoxify beta cells, giving the pancreas a rest while you move into a more normal range. Be patient with yourself, but diligent. You didn't develop diabetes overnight; you may have been pre-diabetic for some time. The closer you get to a more normal weight, the better your chances for better control with less medication.