The role of medicinal plants as primary tools in the maintenance of health as well as prevention and management of diseases is realized with alarming concern in recent days. The present study was undertaken to elucidate the property of some medicinal plants used in the treatment of diabeties mellitus and antioxidant related problems. There are many plants having compounds showing antidiabetic and antioxidant activity in their extracts. An attempt has been made to isolate the compounds responsible for the antidiabetic as well as antibiotic activity. This involves the extraction of the leaves from the plants Cassia auriculata and Moringa oleifera. The experimental observations made showed that there was a significant decrease in the sugar levels after the administration of the plant extracts indicating that the plants used in the present study contain antidiabetic and antioxidant factors which can bring out the hypoglycemic effect.