The aim of this study is to determine the effects of different concentrations of albendazole and lansoprazole, which were benzimidazole derivatives, on endocrinologic and biochemical parameters in experimental type 2 diabetic (T2D) rats. In this study, 46 male Wistar Albino rats were used. Animals were divided as healthy control (0.1 mL/rat/day saline, s.c, n=6), diabetes control (0.1 mL/rat/day saline, s.c, n=8), diabetes+low-dose albendazole (5 mg/kg, oral, n=8), diabetes+high-dose albendazole (10 mg/kg, oral n=8), diabetes+low-dose lansoprazole (15 mg/kg, subcutaneous, n=8) and diabetes+high-dose lansoprazole (30 mg/kg, subcutaneous, n=8). All groups were treated for 8 weeks. The blood samples were analyzed by autoanalyzer and ELISA kits for biochemical and endocrinological parameters, respectively. Glucose, HbA1c, triglyceride, LDL, leptin, and HOMA-IR levels increased and insulin and HOMA-ß levels decreased in the diabetic rats compared to the healthy control group. The glucose, HbA1c, and triglyceride levels were partially decreased however insulin and HOMA-ß levels were increased by low-dose albendazole therapy. The high dose of lansoprazole treatment increased insulin level. The lansoprazole and albendazole treatments can be a potential drug or combined with antidiabetic drugs in T2D treatment by AMPK, PPAR, incretin-like effect and other antidiabetic mechanisms. It may be beneficial to create an effective treatment strategy by developing more specific substances with benzimidazole scaffold.