"What can I do as he refuse to take injections for the high sugar levels. He only use the pills Diamacron and Glucuphage."
Family counseling? He has to be willing to take care of himself first before others can help him. As the saying goes, "You can lead a horse to water, but you can't make it drink the water." I wish I had a better answer for you but my capabilities lays with diabetes, not mental health.
I am sorry that I ask my question to the wrong person. It is the diabetes causing the madness I am sure of it. Raadop