Liver transplantation has been a lifesaving treatment for individuals with end stage liver disease and acute liver failure. However, initial poor function of a liver allograft after liver transplantation, termed early graft dysfunction (EGD), has been associated with increased allograft loss or mortality after transplantation. EGD in LDLT is multifactorial. Factors affecting EGD are GRWR, ischemia reperfusion injury, recipient metabolic demand, graft quality, graft inflow and outflow. Studies shows that the incidence of EGD is 15-38%. It is associated with increased allograft loss \& mortality. Rifaximin is an antibiotic that reduces EGD by 50% as shown by 2 studies but this study was done in DDLT setting and rifaximin was given in the pretransplant group. In this investigators will study the effect of perioperative oral rifaximin on early graft dysfunction in adult living donor liver transplant.