In diabetics , decades over there could be side effects due to impedance of circulation or degeneration of the blood vessels that could cause numbness of the extremeties.
Homeopathic medicine has good remedies like sulph, gymnema sylvestra, gnaphalium, cephalandra indica which would help in preventing the side effects.
I am sure homeopathic medicine would be of help to you.

Dr.Venugopal gouri.