The aim of this study was to evaluate the effectiveness ofDongsulin (rDNA, insulin) in maintaining HbA1c level in a normal clinical practice setting and secondly to assess weight gain, episodes of hypoglycaemia, insulin dose change and its safety. Fifty two diabetic patients already on human insulin (rDNA) were enrolled to a 12 week of treatment. Patients with HbA1c level between 6-8% were switched to Dongsulin on same dosage. The compliance of the patient regarding dietary pattern, physical activity and insulin dosages were assessed. HbA1c was checked after 12 weeks. Patient known to have either of the noncompliance factors during the study period were grouped as group B (non compliant) while, patients who were compliant were grouped as group A (compliant). Thirty nine patients completed the study. No significant difference was found between the HbA1c of two visits in group A (p = 0.32) while, HbA1c in group B was significantly raised as compared to first visit (p = 0.000). In group B patients missed the doses, changes in their diets and decreased their physical activity significantly. The mean insulin dose and weight of the patient remained the same in both groups. No major episode of hypoglycemia was observed. This study has shown that patients who remained compliant during the study period, switched over to Dongsulin had no significant change in the glycaemic control as measured by HbA1c.