Thyroid hormones affect glucose metabolism through several mechanisms. Hyperthyroidism has been recognized to promote hyperglycemia. During hyperthyroidism, the half-life of insulin is reduced most likely secondary to an increased rate of degradation and an enhanced release of biologically inactive insulin precursors. Randomly selected 100 patients, both male and female with type 2 diabetes mellitus above age of 40 years including newly diagnosed diabetics attending hospital were included in this study. Out of 12 patients 4 patients (33.3%) had systemic hypertension and 1 patient (8.33%) had ischemic heart disease, compared with normal thyroid profile group it is of no statistical significance with P value of 0.896. Comparing mean HbA1C of patients with abnormal thyroid profile with that of patients with normal thyroid profile it has no statistical significance with P value of 0.7944.