Your father is going to die. He’s not going to die from low blood sugar. He’s going to die from high blood sugar. He could die any day.
Your in a really tough spot. I would advise you to take the most dramatic action that you can as quickly as you can (immediately). I would call adult protective services. He is clearly dying. They will be able to tell just by looking at him that he is dying. Self Neglect | DSHS
This isn’t a situation where you convince someone to change. This is an emergency situation where everyday matters.
He is drinking so much soda because his blood sugar is high and he is thirsty. He needs to drink water.
If he is afraid of lowering his blood sugar because it makes him feel weak, then someone might have to stay with him so he’s not so afraid. Is there a daytime nursing program you could enroll him in? Somewhere with other people around who could watch him during the day while your at work?
He might feel weak as his BG lowers, but he’s not gonna die until you get under 100 (30 is a danger zone), but he’s not gonna get there anytime soon.
If you tell us what city your in, maybe we can find a diabetic phycologist. I don’t think it hurts to have those resources on hand, but the level of danger he is in is much higher than that. I think you could possibly have him committed for being a danger to himself and being totally unfit to care for himself. I think you need to do that quickly.