Hello, Thanks for the query. A person having T2 DM has to follow certain guidelines in terms of diet and exercises. Plus when on medication it is necessary to maintain FBG Secondly sweetened drinks and any other sweets have to be avoided, as those increase blood glucose suddenly. Plus alcohol also needs to be avoided. Since he has prostatic enlargement, there is bound to be difficulty in urination, that is the reason for giving Tamsulosin. For a person with diabetes it is essential to adapt a modified lifestyle which means taking restricted diet, giving exact amount of calories based on ideal body weight, extent of daily exercise and blood glucose levels. Plus refraining from high fat, foods, junk foods, alcohol and smoking. At the cost of repetition let me say again he has to avoid sugars and sweetened drinks strictly. With high blood glucose levels if present treatment may not benefit, then Insulin will have to be added to control glucose. In most of the T2 DM patients Insulin has to be used to control blood glucose when disease goes on for over many years. Thanks.