Diabetes mellitus is a chronic disorder characterized by increased blood glucose level. The available commercial oral antidiabetic drugs have some serious side effects; hence there is a need for new hypoglycemic agents which will have therapeutic efficacy as well as less side effects. Ferulic acid, a phytochemical, might be a good supplement to manage diabetes. We investigated the antidiabetic and antilipidemic effect of ferulic acid alone and in combination with oral antidiabetic drugs (metformin and Thiazolidinedione (THZ)). Blood glucose, plasma lipid profiles levels, liver function and kidney function markers were measured in control and streptozotocin induced diabetic rats three weeks after administrating ferulic acid and OHDs (oral hypoglycemic drugs) alone and in combinations. The histopathological analysis of the pancreas was also carried out. Ferulic acid and OHDs significantly reduced the blood glucose, lipid profile, urea, creatinine, serum glutamic pyruvic transaminases (SGPT) and serum glutamic oxaloacetate transaminases (SGOT) in diabetic rats. Same level of reduction in blood glucose levels was achieved when ferulic acid was used in combination with even reduced amounts of OHDs. It decreased most of the side effects when used in combination with THZ. Histopathological analysis showed that combinations increased the number of islets. Ferulic acid interacts synergistically with both the drugs. It might be a good supplement with the OHDs to manage diabetic complications as well as reduces the use of the later. © 2013 Elsevier GmbH. All rights reserved.