This is a randomized controlled trial whose purpose is to evaluate the efficacy of therapy with lactulose and rifaximin associated with a vegetable diet in the prevention of post-TIPS hepatic encephalopathy.

Inclusion Criteria:

• consecutive cirrhotic patients undergoing TIPS

Exclusion Criteria:

• age >75 years; bilirubin levels >5 mg/dl; creatinine levels >3 mg/dl; a serious cardiac or pulmonary dysfunction; a Child-Pugh's score >11 (except for the patients candidates to early TIPS); a model end-stage liver disease (MELD) score >18; a diagnosis of hepatic carcinoma; sepsis; spontaneous bacterial peritonitis; renal insufficiency. Present HE or previous spontaneous/recurrent HE, alcohol/psychoactive drugs intake (positive alcoholaemia and/or benzodiazepines or opioid urine metabolites) at the moment of evaluation, unrelated neurological disease including dementia (mini mental state < 26).