Background: Schizophrenia is a severe illness. Rate of type 2 diabetes is about 2–3 times higher as compared to the general population. We are intended to perform the oral glucose tolerance test in drug–naïve schizophrenia patients & determine whether the disease itself increase the risk of impaired glucose tolerance or not, it will guide the antipsychotic treatment & help in minimizing the risk & complications of metabolic impairment. Material & Method: Two group i.e. ‘drug naïve schizophrenia patients’ &‘healthy controls ’were recruited from OPD of psychiatry, M.Y and mental hospital, Indore. Assessment was done with oral glucose tolerance test. Results:Mean fasting and 2hr blood sugar among cases and control were 81.2±15.9 & 116.08±25.7 and 83.1±12.1. & 115.7±20.2 respectively. Prevalence of impaired oral glucose tolerance test(OGTT) among cases & control was 15% and 3.3% respectively. Conclusion: OGTT was significantly impaired in cases as compared to controls