Hello,
I'm afraid there isn't anything like that.
Diabetes control is a complex task that may take some time. Most of all, it requires patient cooperation.
Is his diabetes type 1 or type 2?
I understand he is
overweight which probably means that he likes eating.
Insulin dosage may vary a lot depending on food intake (quantity and quality), physical activity and intrinsic factors like the patient's resistance to insulin.
He should cooperate closely with his doctor to create an eating schedule, engage in physical activities if not contraindicated by other conditions and learn to modify the dosage of insulin depending on food, activity and blood
glucose measurements. This is too broad to be covered here in detail.
If you need more information then please provide more data like the patient's history (including his age and type of diabetes), drugs, eating schedule, measurements (fasting glucose, before meals and 2 hours after them) and his activities schedule as well.
Kind Regards!