Type 2 Diabetes Mellitus (T2DM) patients are at high risk of Coronary Heart Disease (CHD) and need a global therapeutic intervention. A fixed-dose combination prescription medication containing anti-diabetic drug (Sitagliptin) and lipid lowering (Simvastatin) has recently been approved. Present study was designed to explore the potential synergistic toxic effects of sitagliptin and simvastatin at cellular level.