Hello, Because postprandial glucose elevations tend to be higher in elderly diabetic patients, intensive efforts to reduce blood sugar levels  to normal or near-normal levels may greatly increase the risk of hypoglycemic events.  following are the factors which may cause problems... 1...Poor or erratic nutritional intake 2...,Changes in mental status that impair the perception or response to hypoglycemia 3...Increased polypharmacy and noncompliance with medications 4...Dependence or isolation that limits receipt of early treatment for hypoglycemia 5...Impaired renal or hepatic metabolism Hiwever as far as aggressive  control of blood pressure is concerned ,beneficial effects on microvascular complications equal to or greater than that of tight glycemic control.Further, the beneficial effects of improved blood pressure control extended to cardiovascular and stroke events, which occur with much greater frequency (and with greater morbidity and mortality) than microvascular complications in elderly diabetic patients.  So, aggressive control of blood pressure should be a high priority in the management of older hypertensive diabetic patients. So that is the reason your doctor has added LISINOPRIL to TAZOLAC to achieve a better blood pressure control. So the levels of FASTING around 120 and PP between 180 to 200 are acceptable. Thanks