Diabetic coma, is there anything that can be done?

Treat the diabetes: Your question is not specific. You can be in a coma from very high or very low glu. Diabetic ketoacidosis is treated with fluids, insulin, potassium. The more important question: how can you prevent diabetic coma from happening again? Sometimes an illness can bring it on (infection, heart attack, etc) but often it occurs when the patient with diabetes is not taking care of himself.