hepatic encephalopathy and lactulose

today i learned that lactulose helps in easing up hepatic encephalopathy. lactulose alters acidity of the colon tract preventing absorption of ammonia into the bloodstream...ammonia is just one of the many toxins carried by the bloodstream, and toxins can cause encaphalopathy when blood does not go through the liver but then enters the brain...causing altered mentation n stuff like that