Kidney transplantation is the preferred treatment when chronic kidney disease (CKD) reaches the end stage. Despite the fact that renal transplantation lowers the mortality and improves life quality, allograft rejection is the major threat for graft survival. Therefore, the post renal transplantation management regimen is required following the transplant surgery, involving the prescriptions of immunosuppressive drugs, Mycophenolate mofetil (MMF) and Azathioprine (AZA), to inhibit the rejection of the immune system and increase the survival rate and life expectancy among patients. MMF alleviates the acute rejection following the renal transplantation more effectively (by 30- 50% compared with AZA) and with less severe adverse effects (MMF is less hepatotoxic and mutagenic) and associates with lower graft loss compared with AZA. However, the price of MMF is more than 15 times the price of AZA.