Husband diabetic 55 over weight vomiting and diarrhea constantly for 3 weeks hospital last week gave fluid and antibiotics still not better any ideas what it might be

As you know, diabetes over years, and lack of careful attention to diet, leads to all sorts of complications, and it would not be appropriate to talk about it online. Nor is there room enough. There is very little in the medical world that doesn't require work from the person with the disease.