You must consult a diabetologist for any changes in medication or initiation of insulin injections, if required for managing diabetes in a better way. Do you use a glucometer device for monitoring blood glucose at home? if you haven t been doing so, I would suggest you to purchase a glucometer and start monitoring his blood sugar at home. Record the readings pre and post meals to alter his diet. Make sure he eats his meals at regular intervals everyday. Having meals on time and avoiding too much gap between meals prevents any fluctuations in blood glucose. Whenever he has hypoglycemia, treat it with 15 gms of glucose or sugar ( 3 tsp of glucose/sugar/3-4 glucose biscuits). Make sure he eats adequately and avoid intake of refined carbohydrates like white bread, white polished rice or maida products including bakery items and sweets. Ensure he has a healthy diet comprising of fibre rich foods like whole pulses or grams like whole bengal gram or chana, whole grain cereals like dalia, oats and oat bran (good for lowering cholesterol and preventing any spikes in blood glucose levels), whole wheat chapati, brown rice, partly milled rice. Control portion sizes to avoid too high or too low sugar levels. A meal pattern with 3 main meals (breakfast ,lunch and dinner) and 3 in between snacks will be helpful. Avoid fried, fatty foods like butter ghee or milk cream. Foods which can raise blood sugar significantly are dried fruits, nuts, sweets, oily foods to name a few. Hope this information will serve you as a guide to manage diabetes in a better way.