Insulin can also help manage high blood glucose levels in type 2 diabetes, but is typically used only when other treatments have not had the desired effect.Women with type 2 diabetes who become pregnant may also use it to reduce the effects of the condition on the fetus.In people with high blood glucose levels in spite of applying lifestyle measures to bring them down, doctors can prescribe non-insulin drugs to lower blood glucose.Many of the drugs have a combination of effects. If a person needs two or more treatments to control glucose levels, insulin treatment may be necessary.