We know almost as much about depression. Major depression, regardless of cause, can lead to eating disorders, physical inactivity, abandonment of consistent routine, and other behavioral changes that can harm your diabetes control. Successful treatment for depression, whether with counseling, medication, or both, improves one's capacity to independently carry out the necessary tasks of diabetes self-management. But there's more. Certain medications used to treat depression have also proven effective against diabetic complications.
Tricyclic antidepressants appear effective against certain forms of diabetic neuropathy.
Other medications may be effective as well, although such medications may impact one's blood sugar control. The nature of the link is still unclear. What is clear is that significant improvement to either condition can improve the other.