Diagnostic evaluation before randomisation includes assessment of clinical hepatic encephalopathy, usual blood tests, and Doppler-ultrasonography of the abdomen. Inclusion and exclusion criteria will be checked during the inclusion visit. Informations concerning the trial will also be given. After the investigator receives written informed consent, randomisation will be performed online. Randomisation will be centralized, equilibrated for each center, stratified according to whether cirrhosis is alcoholic or not and adjusted every ten patients.