Hepatic encephalopathy (HE), a challenging complication of advanced liver disease, occurs in approximately 30-45% of patients with cirrhosis. The treatment of choice is non-absorbable disaccharides, such as lactulose and lactitol.Probiotics are effective in the treatment of minimal hepatic encephalopathy which precipitates hepatic encephalopathy. The investigators will assess the effects of lactulose and probiotics for the prevention of recurrence of HE (secondary prophylaxis) in patients after the recovery of an episode of overt hepatic encephalopathy.